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Start Over Author "Absil, O." Publisher american astronomical society
24 results on '"Absil, O."'

1. The JWST Early-release Science Program for Direct Observations of Exoplanetary Systems II: A 1 to 20 μm Spectrum of the Planetary-mass Companion VHS 1256-1257 b

Author

Miles, BE, Biller, BA, Patapis, P, Worthen, K, Rickman, E, Hoch, KKW, Skemer, A, Perrin, MD, Whiteford, N, Chen, CH, Sargent, B, Mukherjee, S, Morley, CV, Moran, SE, Bonnefoy, M, Petrus, S, Carter, AL, Choquet, E, Hinkley, S, Ward-Duong, K, Leisenring, JM, Millar-Blanchaer, MA, Pueyo, L, Ray, S, Sallum, S, Stapelfeldt, KR, Stone, JM, Wang, JJ, Absil, O, Balmer, WO, Boccaletti, A, Bonavita, M, Booth, M, Bowler, BP, Chauvin, G, Christiaens, V, Currie, T, Danielski, C, Fortney, JJ, Girard, JH, Grady, CA, Greenbaum, AZ, Henning, T, Hines, DC, Janson, M, Kalas, P, Kammerer, J, Kennedy, GM, Kenworthy, MA, Kervella, P, Lagage, PO, Lew, BWP, Liu, MC, Macintosh, B, Marino, S, Marley, MS, Marois, C, Matthews, EC, Matthews, BC, Mawet, D, McElwain, MW, Metchev, S, Meyer, MR, Molliere, P, Pantin, E, Quirrenbach, A, Rebollido, I, Ren, BB, Schneider, G, Vasist, M, Wyatt, MC, Zhou, Y, Briesemeister, ZW, Bryan, ML, Calissendorff, P, Cantalloube, F, Cugno, G, De Furio, M, Dupuy, TJ, Factor, SM, Faherty, JK, Fitzgerald, MP, Franson, K, Gonzales, EC, Hood, CE, Howe, AR, Kraus, AL, Kuzuhara, M, Lagrange, AM, Lawson, K, Lazzoni, C, Liu, P, Llop-Sayson, J, Lloyd, JP, Martinez, RA, Mazoyer, J, Quanz, SP, Redai, JA, Samland, M, Schlieder, JE, Miles, BE [0000-0002-5500-4602], Biller, BA [0000-0003-4614-7035], Patapis, P [0000-0001-8718-3732], Worthen, K [0000-0002-5885-5779], Rickman, E [0000-0003-4203-9715], Hoch, KKW [0000-0002-9803-8255], Skemer, A [0000-0001-6098-3924], Perrin, MD [0000-0002-3191-8151], Whiteford, N [0000-0001-8818-1544], Chen, CH [0000-0002-8382-0447], Sargent, B [0000-0001-9855-8261], Mukherjee, S [0000-0003-1622-1302], Morley, CV [0000-0002-4404-0456], Moran, SE [0000-0002-6721-3284], Bonnefoy, M [0000-0001-5579-5339], Petrus, S [0000-0003-0331-3654], Carter, AL [0000-0001-5365-4815], Choquet, E [0000-0002-9173-0740], Hinkley, S [0000-0001-8074-2562], Ward-Duong, K [0000-0002-4479-8291], Leisenring, JM [0000-0002-0834-6140], Millar-Blanchaer, MA [0000-0001-6205-9233], Ray, S [0000-0003-2259-3911], Sallum, S [0000-0001-6871-6775], Stapelfeldt, KR [0000-0002-2805-7338], Stone, JM [0000-0003-0454-3718], Wang, JJ [0000-0003-0774-6502], Absil, O [0000-0002-4006-6237], Balmer, WO [0000-0001-6396-8439], Boccaletti, A [0000-0001-9353-2724], Bonavita, M [0000-0002-7520-8389], Booth, M [0000-0001-8568-6336], Bowler, BP [0000-0003-2649-2288], Chauvin, G [0000-0003-4022-8598], Christiaens, V [0000-0002-0101-8814], Currie, T [0000-0002-7405-3119], Danielski, C [0000-0002-3729-2663], Fortney, JJ [0000-0002-9843-4354], Girard, JH [0000-0001-8627-0404], Greenbaum, AZ [0000-0002-7162-8036], Henning, T [0000-0002-1493-300X], Hines, DC [0000-0003-4653-6161], Janson, M [0000-0001-8345-593X], Kalas, P [0000-0002-6221-5360], Kammerer, J [0000-0003-2769-0438], Kennedy, GM [0000-0001-6831-7547], Kenworthy, MA [0000-0002-7064-8270], Kervella, P [0000-0003-0626-1749], Lew, BWP [0000-0003-1487-6452], Liu, MC [0000-0003-2232-7664], Macintosh, B [0000-0003-1212-7538], Marino, S [0000-0002-5352-2924], Marley, MS [0000-0002-5251-2943], Marois, C [0000-0002-4164-4182], Matthews, EC [0000-0003-0593-1560], Matthews, BC [0000-0003-3017-9577], Mawet, D [0000-0002-8895-4735], McElwain, MW [0000-0003-0241-8956], Metchev, S [0000-0003-3050-8203], Meyer, MR [0000-0003-1227-3084], Molliere, P [0000-0003-4096-7067], Pantin, E [0000-0001-6472-2844], Rebollido, I [0000-0002-4388-6417], Ren, BB [0000-0003-1698-9696], Schneider, G [0000-0002-4511-5966], Vasist, M [0000-0002-4511-3602], Wyatt, MC [0000-0001-9064-5598], Zhou, Y [0000-0003-2969-6040], Briesemeister, ZW [0000-0002-1764-2494], Bryan, ML [0000-0002-6076-5967], Calissendorff, P [0000-0002-5335-0616], Cantalloube, F [0000-0002-3968-3780], Cugno, G [0000-0001-7255-3251], De Furio, M [0000-0003-1863-4960], Dupuy, TJ [0000-0001-9823-1445], Factor, SM [0000-0002-8332-8516], Faherty, JK [0000-0001-6251-0573], Fitzgerald, MP [0000-0002-0176-8973], Franson, K [0000-0003-4557-414X], Gonzales, EC [0000-0003-4636-6676], Hood, CE [0000-0003-1150-7889], Howe, AR [0000-0002-4884-7150], Kraus, AL [0000-0001-9811-568X], Kuzuhara, M [0000-0002-4677-9182], Lawson, K [0000-0002-6964-8732], Lazzoni, C [0000-0001-7819-9003], Liu, P [0000-0001-7047-0874], Llop-Sayson, J [0000-0002-3414-784X], Martinez, RA [0000-0001-6301-896X], Mazoyer, J [0000-0002-9133-3091], Quanz, SP [0000-0003-3829-7412], Redai, JA [0000-0002-4489-3168], Samland, M [0000-0001-9992-4067], Schlieder, JE [0000-0001-5347-7062], and Apollo - University of Cambridge Repository

Subjects
The Solar System, Exoplanets, and Astrobiology, 5109 Space Sciences, 51 Physical Sciences
Abstract

We present the highest fidelity spectrum to date of a planetary-mass object. VHS 1256 b is a M Jup widely separated (∼8″, a = 150 au), young, planetary-mass companion that shares photometric colors and spectroscopic features with the directly imaged exoplanets HR 8799c, d, and e. As an L-to-T transition object, VHS 1256 b exists along the region of the color–magnitude diagram where substellar atmospheres transition from cloudy to clear. We observed VHS 1256 b with JWST's NIRSpec IFU and MIRI MRS modes for coverage from 1 to 20 μm at resolutions of ∼1000–3700. Water, methane, carbon monoxide, carbon dioxide, sodium, and potassium are observed in several portions of the JWST spectrum based on comparisons from template brown dwarf spectra, molecular opacities, and atmospheric models. The spectral shape of VHS 1256 b is influenced by disequilibrium chemistry and clouds. We directly detect silicate clouds, the first such detection reported for a planetary-mass companion.

Published
2023

2. The HOSTS Survey: Evidence for an Extended Dust Disk and Constraints on the Presence of Giant Planets in the Habitable Zone of β Leo

Author

Defrère, D., primary, Hinz, P. M., additional, Kennedy, G. M., additional, Stone, J., additional, Rigley, J., additional, Ertel, S., additional, Gaspar, A., additional, Bailey, V. P., additional, Hoffmann, W. F., additional, Mennesson, B., additional, Millan-Gabet, R., additional, Danchi, W. C., additional, Absil, O., additional, Arbo, P., additional, Beichman, C, additional, Bonavita, M, additional, Brusa, G., additional, Bryden, G., additional, Downey, E. C., additional, Esposito, S., additional, Grenz, P., additional, Haniff, C., additional, Hill, J. M., additional, Leisenring, J. M., additional, Males, J. R., additional, McMahon, T. J., additional, Montoya, M., additional, Morzinski, K. M., additional, Pinna, E., additional, Puglisi, A., additional, Rieke, G., additional, Roberge, A., additional, Rousseau, H., additional, Serabyn, E., additional, Spalding, E., additional, Skemer, A. J., additional, Stapelfeldt, K., additional, Su, K., additional, Vaz, A., additional, Weinberger, A. J., additional, and Wyatt, M. C., additional

Published
2021
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3. The HOSTS Survey for Exozodiacal Dust: Observational Results from the Complete Survey

Author

Ertel, S., primary, Defrère, D., additional, Hinz, P., additional, Mennesson, B., additional, Kennedy, G. M., additional, Danchi, W. C., additional, Gelino, C., additional, Hill, J. M., additional, Hoffmann, W. F., additional, Mazoyer, J., additional, Rieke, G., additional, Shannon, A., additional, Stapelfeldt, K., additional, Spalding, E., additional, Stone, J. M., additional, Vaz, A., additional, Weinberger, A. J., additional, Willems, P., additional, Absil, O., additional, Arbo, P., additional, Bailey, V. P., additional, Beichman, C., additional, Bryden, G., additional, Downey, E. C., additional, Durney, O., additional, Esposito, S., additional, Gaspar, A., additional, Grenz, P., additional, Haniff, C. A., additional, Leisenring, J. M., additional, Marion, L., additional, McMahon, T. J., additional, Millan-Gabet, R., additional, Montoya, M., additional, Morzinski, K. M., additional, Perera, S., additional, Pinna, E., additional, Pott, J.-U., additional, Power, J., additional, Puglisi, A., additional, Roberge, A., additional, Serabyn, E., additional, Skemer, A. J., additional, Su, K. Y. L., additional, Vaitheeswaran, V., additional, and Wyatt, M. C., additional

Published
2020
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4. The HOSTS Survey—Exozodiacal Dust Measurements for 30 Stars

Author

Ertel, S., primary, Defrère, D., additional, Hinz, P., additional, Mennesson, B., additional, Kennedy, G. M., additional, Danchi, W. C., additional, Gelino, C., additional, Hill, J. M., additional, Hoffmann, W. F., additional, Rieke, G., additional, Shannon, A., additional, Spalding, E., additional, Stone, J. M., additional, Vaz, A., additional, Weinberger, A. J., additional, Willems, P., additional, Absil, O., additional, Arbo, P., additional, Bailey, V. P., additional, Beichman, C., additional, Bryden, G., additional, Downey, E. C., additional, Durney, O., additional, Esposito, S., additional, Gaspar, A., additional, Grenz, P., additional, Haniff, C. A., additional, Leisenring, J. M., additional, Marion, L., additional, McMahon, T. J., additional, Millan-Gabet, R., additional, Montoya, M., additional, Morzinski, K. M., additional, Pinna, E., additional, Power, J., additional, Puglisi, A., additional, Roberge, A., additional, Serabyn, E., additional, Skemer, A. J., additional, Stapelfeldt, K., additional, Su, K. Y. L., additional, Vaitheeswaran, V., additional, and Wyatt, M. C., additional

Published
2018
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5. Deep Imaging Search for Planets Forming in the TW Hya Protoplanetary Disk with the Keck/NIRC2 Vortex Coronagraph

Author

Ruane, G., primary, Mawet, D., additional, Kastner, J., additional, Meshkat, T., additional, Bottom, M., additional, Castellá, B. Femenía, additional, Absil, O., additional, Gonzalez, C. Gomez, additional, Huby, E., additional, Zhu, Z., additional, Jensen-Clem, R., additional, Choquet, É., additional, and Serabyn, E., additional

Published
2017
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6. THE W. M. KECK OBSERVATORY INFRARED VORTEX CORONAGRAPH AND A FIRST IMAGE OF HIP 79124 B

Author

Serabyn, E., primary, Huby, E., additional, Matthews, K., additional, Mawet, D., additional, Absil, O., additional, Femenia, B., additional, Wizinowich, P., additional, Karlsson, M., additional, Bottom, M., additional, Campbell, R., additional, Carlomagno, B., additional, Defrère, D., additional, Delacroix, C., additional, Forsberg, P., additional, Gonzalez, C. Gomez, additional, Habraken, S., additional, Jolivet, A., additional, Liewer, K., additional, Lilley, S., additional, Piron, P., additional, Reggiani, M., additional, Surdej, J., additional, Tran, H., additional, Catalán, E. Vargas, additional, and Wertz, O., additional

Published
2017
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7. Polarization measurements of hot dust stars and the local interstellar medium

Author

Marshall, JP, Cotton, DV ; https://orcid.org/0000-0003-0340-7773, Bott, K, Ertel, S, Kennedy, GM, Wyatt, MC, Burgo, CD, Absil, O, Bailey, J ; https://orcid.org/0000-0002-5726-7000, Kedziora-Chudczer, L ; https://orcid.org/0000-0001-7212-0835, Marshall, JP, Cotton, DV ; https://orcid.org/0000-0003-0340-7773, Bott, K, Ertel, S, Kennedy, GM, Wyatt, MC, Burgo, CD, Absil, O, Bailey, J ; https://orcid.org/0000-0002-5726-7000, and Kedziora-Chudczer, L ; https://orcid.org/0000-0001-7212-0835

Published
2016

9. NULLING DATA REDUCTION AND ON-SKY PERFORMANCE OF THE LARGE BINOCULAR TELESCOPE INTERFEROMETER

Author

Defrère, D., primary, Hinz, P. M., additional, Mennesson, B., additional, Hoffmann, W. F., additional, Millan-Gabet, R., additional, Skemer, A. J., additional, Bailey, V., additional, Danchi, W. C., additional, Downey, E. C., additional, Durney, O., additional, Grenz, P., additional, Hill, J. M., additional, McMahon, T. J., additional, Montoya, M., additional, Spalding, E., additional, Vaz, A., additional, Absil, O., additional, Arbo, P., additional, Bailey, H., additional, Brusa, G., additional, Bryden, G., additional, Esposito, S., additional, Gaspar, A., additional, Haniff, C. A., additional, Kennedy, G. M., additional, Leisenring, J. M., additional, Marion, L., additional, Nowak, M., additional, Pinna, E., additional, Powell, K., additional, Puglisi, A., additional, Rieke, G., additional, Roberge, A., additional, Serabyn, E., additional, Sosa, R., additional, Stapeldfeldt, K., additional, Su, K., additional, Weinberger, A. J., additional, and Wyatt, M. C., additional

Published
2016
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10. FIRST-LIGHT LBT NULLING INTERFEROMETRIC OBSERVATIONS: WARM EXOZODIACAL DUST RESOLVED WITHIN A FEW AU OF η Crv

Author

Defrère, D., primary, Hinz, P. M., additional, Skemer, A. J., additional, Kennedy, G. M., additional, Bailey, V. P., additional, Hoffmann, W. F., additional, Mennesson, B., additional, Millan-Gabet, R., additional, Danchi, W. C., additional, Absil, O., additional, Arbo, P., additional, Beichman, C., additional, Brusa, G., additional, Bryden, G., additional, Downey, E. C., additional, Durney, O., additional, Esposito, S., additional, Gaspar, A., additional, Grenz, P., additional, Haniff, C., additional, Hill, J. M., additional, Lebreton, J., additional, Leisenring, J. M., additional, Males, J. R., additional, Marion, L., additional, McMahon, T. J., additional, Montoya, M., additional, Morzinski, K. M., additional, Pinna, E., additional, Puglisi, A., additional, Rieke, G., additional, Roberge, A., additional, Serabyn, E., additional, Sosa, R., additional, Stapeldfeldt, K., additional, Su, K., additional, Vaitheeswaran, V., additional, Vaz, A., additional, Weinberger, A. J., additional, and Wyatt, M. C., additional

Published
2015
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11. CONSTRAINING THE EXOZODIACAL LUMINOSITY FUNCTION OF MAIN-SEQUENCE STARS: COMPLETE RESULTS FROM THE KECK NULLER MID-INFRARED SURVEYS

Author

Mennesson, B., primary, Millan-Gabet, R., additional, Serabyn, E., additional, Colavita, M. M., additional, Absil, O., additional, Bryden, G., additional, Wyatt, M., additional, Danchi, W., additional, Defrère, D., additional, Doré, O., additional, Hinz, P., additional, Kuchner, M., additional, Ragland, S., additional, Scott, N., additional, Stapelfeldt, K., additional, Traub, W., additional, and Woillez, J., additional

Published
2014
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12. SOUTHERN MASSIVE STARS AT HIGH ANGULAR RESOLUTION: OBSERVATIONAL CAMPAIGN AND COMPANION DETECTION

Author

Sana, H., primary, Le Bouquin, J.-B., additional, Lacour, S., additional, Berger, J.-P., additional, Duvert, G., additional, Gauchet, L., additional, Norris, B., additional, Olofsson, J., additional, Pickel, D., additional, Zins, G., additional, Absil, O., additional, de Koter, A., additional, Kratter, K., additional, Schnurr, O., additional, and Zinnecker, H., additional

Published
2014
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14. HERSCHEL's “COLD DEBRIS DISKS”: BACKGROUND GALAXIES OR QUIESCENT RIMS OF PLANETARY SYSTEMS?

Author

Krivov, A. V., primary, Eiroa, C., additional, Löhne, T., additional, Marshall, J. P., additional, Montesinos, B., additional, del Burgo, C., additional, Absil, O., additional, Ardila, D., additional, Augereau, J.-C., additional, Bayo, A., additional, Bryden, G., additional, Danchi, W., additional, Ertel, S., additional, Lebreton, J., additional, Liseau, R., additional, Mora, A., additional, Mustill, A. J., additional, Mutschke, H., additional, Neuhäuser, R., additional, Pilbratt, G. L., additional, Roberge, A., additional, Schmidt, T. O. B., additional, Stapelfeldt, K. R., additional, Thébault, Ph., additional, Vitense, Ch., additional, White, G. J., additional, and Wolf, S., additional

Published
2013
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18. DUST IN THE INNER REGIONS OF DEBRIS DISKS AROUND A STARS

Author

Akeson, R. L., primary, Ciardi, D. R., additional, Millan-Gabet, R., additional, Merand, A., additional, Folco, E. Di, additional, Monnier, J. D., additional, Beichman, C. A., additional, Absil, O., additional, Aufdenberg, J., additional, McAlister, H., additional, Brummelaar, T. ten, additional, Sturmann, J., additional, Sturmann, L., additional, and Turner, N., additional

Published
2009
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19. Erratum: “First Results from the CHARA Array. VII. Long‐Baseline Interferometric Measurements of Vega Consistent with a Pole‐On, Rapidly Rotating Star” (ApJ, 645, 664 [2006])

Author

Aufdenberg, J. P., primary, Merand, A., additional, Coude du Foresto, V., additional, Absil, O., additional, Di Folco, E., additional, Kervella, P., additional, Ridgway, S. T., additional, Berger, D. H., additional, ten Brummelaar, T. A., additional, McAlister, H. A., additional, Sturmann, J., additional, Sturmann, L., additional, and Turner, N. H., additional

Published
2006
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20. First Results from the CHARA Array. VII. Long‐Baseline Interferometric Measurements of Vega Consistent with a Pole‐On, Rapidly Rotating Star

Author

Aufdenberg, J. P., primary, Merand, A., additional, Foresto, V. Coude du, additional, Absil, O., additional, Di Folco, E., additional, Kervella, P., additional, Ridgway, S. T., additional, Berger, D. H., additional, Brummelaar, T. A. ten, additional, McAlister, H. A., additional, Sturmann, J., additional, Sturmann, L., additional, and Turner, N. H., additional

Published
2006
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23. Polarization measurements of hot dust stars and the local interstellar medium

Author

Marshall, JP, Cotton, DV, Bott, K, Ertel, S, Kennedy, GM, Wyatt, MC, Burgo, CD, Absil, O, Bailey, J, and Kedziora-Chudczer, L

Subjects
polarization, 13. Climate action, Astrophysics::Solar and Stellar Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics::Earth and Planetary Astrophysics, dust, extinction, circumstellar matter, planetary systems, Astrophysics::Galaxy Astrophysics
Abstract

Debris discs are typically revealed through the presence of excess emission at infrared wavelengths. Most discs exhibit excess at mid- and far-infrared wavelengths, analogous to the solar system's Asteroid and Edgeworth-Kuiper belts. Recently, stars with strong (∼1%) excess at near-infrared wavelengths were identified through interferometric measurements. Using the HIgh Precision Polarimetric Instrument, we examined a sub-sample of these hot dust stars (and appropriate controls) at parts-per-million sensitivity in SDSS g′ (green) and r′ (red) filters for evidence of scattered light. No detection of strongly polarized emission from the hot dust stars is seen. We, therefore, rule out scattered light from a normal debris disk as the origin of this emission. A wavelength-dependent contribution from multiple dust components for hot dust stars is inferred from the dispersion (the difference in polarization angle in red and green) of southern stars. Contributions of 17 ppm (green) and 30 ppm (red) are calculated, with strict 3-σ upper limits of 76 and 68 ppm, respectively. This suggests weak hot dust excesses consistent with thermal emission, although we cannot rule out contrived scenarios, e.g., dust in a spherical shell or face-on discs. We also report on the nature of the local interstellar medium (ISM), obtained as a byproduct of the control measurements. Highlights include the first measurements of the polarimetric color of the local ISM and the discovery of a southern sky region with a polarization per distance thrice the previous maximum. The data suggest that λ max, the wavelength of maximum polarization, is bluer than typical.

24. First Scattered-light Images of the Gas-rich Debris Disk around 49 Ceti

Author

Choquet, E, Milli, J, Wahhaj, Z, Soummer, R, Roberge, A, Augereau, JC, Booth, M, Absil, O, Boccaletti, A, Chen, CH, Debes, JH, Burgo, CD, Dent, WRF, Ertel, S, Girard, JH, Gofas-Salas, E, Golimowski, DA, González, CAG, Hagan, JB, Hibon, P, Hines, DC, Kennedy, GM, Lagrange, AM, Matrà, L, Mawet, D, Mouillet, D, N'Diaye, M, Perrin, MD, Pinte, C, Pueyo, L, Rajan, A, Schneider, G, Wolff, S, and Wyatt, M

Subjects
13. Climate action, techniques: image processing, stars: individual (49 Ceti), circumstellar matter
Abstract

We present the first scattered-light images of the debris disk around 49 Ceti, a ∼40 Myr A1 main-sequence star at 59 pc, famous for hosting two massive dust belts as well as large quantities of atomic and molecular gas. The outer disk is revealed in reprocessed archival Hubble Space Telescope NICMOS-F110W images, as well as new coronagraphic H-band images from the Very Large Telescope SPHERE instrument. The disk extends from 1.″1 (65 au) to 4.″6 (250 au) and is seen at an inclination of 73°, which refines previous measurements at lower angular resolution. We also report no companion detection larger than 3 M Jup at projected separations beyond 20 au from the star (0.″34). Comparison between the F110W and H-band images is consistent with a gray color of 49 Ceti's dust, indicating grains larger than 2 μm. Our photometric measurements indicate a scattering efficiency/infrared excess ratio of 0.2-0.4, relatively low compared to other characterized debris disks. We find that 49 Ceti presents morphological and scattering properties very similar to the gas-rich HD 131835 system. From our constraint on the disk inclination we find that the atomic gas previously detected in absorption must extend to the inner disk, and that the latter must be depleted of CO gas. Building on previous studies, we propose a schematic view of the system describing the dust and gas structure around 49 Ceti and hypothetical scenarios for the gas nature and origin.

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