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Your search keyword '"Harsono, D. [0000-0001-6307-4195]"' showing total 2 results
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2 results on '"Harsono, D. [0000-0001-6307-4195]"'

1. Spectroscopic sizing of interstellar icy grains with JWST

Author

Centre National de la Recherche Scientifique (France), Centre National D'Etudes Spatiales (France), Ministerio de Ciencia e Innovación (España), Dutch Research Council, Royal Astronomical Society, Space Telescope Science Institute (US), Swiss National Science Foundation, Ministry of Education (Taiwan), National Science and Technology Council (Taiwan), Danish National Research Foundation, European Commission, Dartois, E. [0000-0003-1197-7143], Noble, J. A. [0000-0003-4985-8254], Caselli, P. [0000-0003-1481-7911], Fraser, H. J. [0000-0003-0972-1595], Jiménez-Serra, I. [0000-0003-4493-8714], Maté, Belén [0000-0002-5478-8644], McClure, M. K. [0000-0003-1878-327X], #NODATA#, Pendleton, Y. J. [0000-0001-8102-2903], Sturm, J. A. [0000-0002-0377-1316], Taillard, A. [0009-0006-9236-7978], Wakelam, V. [0000-0001-9676-2605], Boogert, A. C.A. [0000-0001-9344-0096], Drozdovskaya, M. N. [0000-0001-7479-4948], Erkal, J. [0000-0002-8476-1389], Harsono, D. [0000-0001-6307-4195], Ioppolo, S. [0000-0002-2271-1781], Linnartz, H. [0000-0002-8322-3538], McGuire, B. A. [0000-0003-1254-4817], Perotti, G. [0000-0002-8545-6175], Rocha, W. R.M. [0000-0001-6144-4113], Dartois, E., Noble, J. A., Caselli, P., Fraser, H. J., Jiménez-Serra, I., Maté, Belén, McClure, M. K., Melnick, G. J., Pendleton, Y. J., Shimonishi, T., Smith, Z. L., Sturm, J. A., Taillard, A., Wakelam, V., Boogert, A. C.A., Drozdovskaya, M. N., Erkal, J., Harsono, D., Herrero, Víctor J., Ioppolo, S., Linnartz, H., McGuire, B. A., Perotti, G., Qasim, D., Rocha, W. R.M., Centre National de la Recherche Scientifique (France), Centre National D'Etudes Spatiales (France), Ministerio de Ciencia e Innovación (España), Dutch Research Council, Royal Astronomical Society, Space Telescope Science Institute (US), Swiss National Science Foundation, Ministry of Education (Taiwan), National Science and Technology Council (Taiwan), Danish National Research Foundation, European Commission, Dartois, E. [0000-0003-1197-7143], Noble, J. A. [0000-0003-4985-8254], Caselli, P. [0000-0003-1481-7911], Fraser, H. J. [0000-0003-0972-1595], Jiménez-Serra, I. [0000-0003-4493-8714], Maté, Belén [0000-0002-5478-8644], McClure, M. K. [0000-0003-1878-327X], #NODATA#, Pendleton, Y. J. [0000-0001-8102-2903], Sturm, J. A. [0000-0002-0377-1316], Taillard, A. [0009-0006-9236-7978], Wakelam, V. [0000-0001-9676-2605], Boogert, A. C.A. [0000-0001-9344-0096], Drozdovskaya, M. N. [0000-0001-7479-4948], Erkal, J. [0000-0002-8476-1389], Harsono, D. [0000-0001-6307-4195], Ioppolo, S. [0000-0002-2271-1781], Linnartz, H. [0000-0002-8322-3538], McGuire, B. A. [0000-0003-1254-4817], Perotti, G. [0000-0002-8545-6175], Rocha, W. R.M. [0000-0001-6144-4113], Dartois, E., Noble, J. A., Caselli, P., Fraser, H. J., Jiménez-Serra, I., Maté, Belén, McClure, M. K., Melnick, G. J., Pendleton, Y. J., Shimonishi, T., Smith, Z. L., Sturm, J. A., Taillard, A., Wakelam, V., Boogert, A. C.A., Drozdovskaya, M. N., Erkal, J., Harsono, D., Herrero, Víctor J., Ioppolo, S., Linnartz, H., McGuire, B. A., Perotti, G., Qasim, D., and Rocha, W. R.M.

Abstract

Clouds of gas and dust in the Galaxy are nurseries in which stars and planetary systems are born. During their journey from the diffuse interstellar medium to the protoplanetary disks, molecular solids accumulate on cold dust grains by accretion and surface chemistry. These so-called icy grains will continuously evolve, notably by collision and aggregation processes, modifying their sizes. Our ‘Ice Age’ James Webb Space Telescope observations of the dense Chamaeleon I cloud reveal that this growth starts early, before the protostellar phase, substantially modifying the ice band profiles in the spectra. Spectral analysis confirms that the grains reach micrometre sizes, implying myriad changes in local microphysics, including mass transfer from small to large grains, reduction in the grain surface available for chemistry and modification of the penetration and propagation of radiation fields. Deformation of the observed profiles complicates the determination of chemical abundance. Observing the extensive icy grain growth in dense clouds quantitatively constrains the grain size evolution before star and planet formation.

Published
2024

2. A Large Double-ring Disk Around the Taurus M Dwarf J04124068+2438157

Author

Feng Long, Bin B. Ren, Nicole L. Wallack, Daniel Harsono, Gregory J. Herczeg, Paola Pinilla, Dimitri Mawet, Michael C. Liu, Sean M. Andrews, Xue-Ning Bai, Sylvie Cabrit, Lucas A. Cieza, Doug Johnstone, Jarron M. Leisenring, Giuseppe Lodato, Yao Liu, Carlo F. Manara, Gijs D. Mulders, Enrico Ragusa, Steph Sallum, Yangfan Shi, Marco Tazzari, Taichi Uyama, Kevin Wagner, David J. Wilner, Jerry W. Xuan, Long, F [0000-0002-7607-719X], Ren, BB [0000-0003-1698-9696], Wallack, NL [0000-0003-0354-0187], Harsono, D [0000-0001-6307-4195], Herczeg, GJ [0000-0002-7154-6065], Pinilla, P [0000-0001-8764-1780], Mawet, D [0000-0002-8895-4735], Liu, MC [0000-0003-2232-7664], Andrews, SM [0000-0003-2253-2270], Bai, XN [0000-0001-6906-9549], Cabrit, S [0000-0002-1593-3693], Cieza, LA [0000-0002-2828-1153], Johnstone, D [0000-0002-6773-459X], Leisenring, JM [0000-0002-0834-6140], Lodato, G [0000-0002-2357-7692], Manara, CF [0000-0003-3562-262X], Mulders, GD [0000-0002-1078-9493], Ragusa, E [0000-0001-5378-7749], Sallum, S [0000-0001-6871-6775], Shi, Y [0000-0001-9277-6495], Tazzari, M [0000-0003-3590-5814], Uyama, T [0000-0002-6879-3030], Wagner, K [0000-0002-4309-6343], Wilner, DJ [0000-0003-1526-7587], Xuan, JW [0000-0002-6618-1137], and Apollo - University of Cambridge Repository

Subjects
Earth and Planetary Astrophysics (astro-ph.EP), Space and Planetary Science, FOS: Physical sciences, Astronomy and Astrophysics, 5109 Space Sciences, 51 Physical Sciences, Astrophysics - Earth and Planetary Astrophysics
Abstract

Planet formation imprints signatures on the physical structures of disks. In this paper, we present high-resolution ($\sim$50 mas, 8 au) Atacama Large Millimeter/submillimeter Array (ALMA) observations of 1.3 mm dust continuum and CO line emission toward the disk around the M3.5 star 2MASS J04124068+2438157. The dust disk consists only of two narrow rings at radial distances of 0.47 and 0.78 arcsec ($\sim$70 and 116 au), with Gaussian $\sigma$ widths of 5.6 and 8.5 au, respectively. The width of the outer ring is smaller than the estimated pressure scale height by $\sim25\%$, suggesting dust trapping in a radial pressure bump. The dust disk size, set by the location of the outermost ring, is significantly larger (by $3\sigma$) than other disks with similar millimeter luminosity, which can be explained by an early formation of local pressure bump to stop radial drift of millimeter dust grains. After considering the disk's physical structure and accretion properties, we prefer planet--disk interaction over dead zone or photoevaporation models to explain the observed dust disk morphology. We carry out high-contrast imaging at $L'$ band using Keck/NIRC2 to search for potential young planets, but do not identify any source above $5\sigma$. Within the dust gap between the two rings, we reach a contrast level of $\sim$7 mag, constraining the possible planet below $\sim$2--4 $M_{\rm Jup}$. Analyses of the gap/ring properties suggest a $\sim$Saturn mass planet at $\sim$90 au is likely responsible for the formation of the outer ring, which can be potentially revealed with JWST., Comment: 15 pages, 5 figures. Accepted for publication in ApJ

Published
2023

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