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Your search keyword '"Linnartz, H. [0000-0002-8322-3538]"' showing total 2 results
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2 results on '"Linnartz, H. [0000-0002-8322-3538]"'

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. Exocomets from a solar system perspective

Author

Eva H. L. Bodman, Maria Teresa Capria, I. Rebollido, Liton Majumdar, Alan Fitzsimmons, Siyi Xu, Ernst J. W. de Mooij, Harold Linnartz, Nader Haghighipour, John H. D. Harrison, P. A. Strøm, Luca Matrà, D. Iglesias, Mihkel Kama, Dennis Bodewits, Matthew M. Knight, Colin Snodgrass, Sebastian Zieba, Cyrielle Opitom, Stefanie N. Milam, Laura K. Rogers, Ilsedore Cleeves, Flavien Kiefer, Quentin Kral, Clara Sousa-Silva, Geraint H. Jones, Zhong-Yi Lin, Strøm, PA [0000-0002-7823-1090], Bodewits, D [0000-0002-2668-7248], Knight, MM [0000-0003-2781-6897], Kiefer, F [0000-0001-9129-4929], Jones, GH [0000-0002-5859-1136], Kral, Q [0000-0001-6527-4684], Matrà, L [0000-0003-4705-3188], Bodman, E [0000-0002-4133-5216], Capria, MT [0000-0002-9814-9588], Cleeves, I [0000-0003-2076-8001], Fitzsimmons, A [0000-0003-0250-9911], Haghighipour, N [0000-0002-5234-6375], Harrison, JHD [0000-0002-9971-4956], Iglesias, D [0000-0002-0756-9836], Kama, M [0000-0003-0065-7267], Linnartz, H [0000-0002-8322-3538], Majumdar, L [0000-0001-7031-8039], de Mooij, EJW [0000-0001-6391-9266], Milam, SN [0000-0001-7694-4129], Opitom, C [0000-0002-9298-7484], Rebollido, I [0000-0002-4388-6417], Rogers, LK [0000-0002-3553-9474], Snodgrass, C [0000-0001-9328-2905], Sousa-Silva, C [0000-0002-7853-6871], Xu, S [0000-0002-8808-4282], Lin, ZY [0000-0003-3827-8991], Zieba, S [0000-0003-0562-6750], Apollo - University of Cambridge Repository, Institut d'Astrophysique de Paris (IAP), Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA (UMR_8109)), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP)

Subjects
Solar System, astro-ph.SR, 010504 meteorology & atmospheric sciences, Main-belt comets, FOS: Physical sciences, 5109 Space Sciences, Protoplanetary disk, 01 natural sciences, Astronomical spectroscopy, Astrobiology, Kuiper belt, Photometry, Exocomets, 0103 physical sciences, Comets, Astrophysics::Solar and Stellar Astrophysics, 010303 astronomy & astrophysics, QC, Solar and Stellar Astrophysics (astro-ph.SR), Spectroscopy, Astrophysics::Galaxy Astrophysics, QB, 0105 earth and related environmental sciences, Physics, Earth and Planetary Astrophysics (astro-ph.EP), White dwarf, Small solar system bodies, Astronomy and Astrophysics, Stars, Astrophysics - Solar and Stellar Astrophysics, 13. Climate action, 5101 Astronomical Sciences, Space and Planetary Science, Physics::Space Physics, astro-ph.EP, Astrophysics::Earth and Planetary Astrophysics, Formation and evolution of the Solar System, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], 51 Physical Sciences, Main sequence, Astrophysics - Earth and Planetary Astrophysics, Extrasolar Small Bodies, Exocomet
Abstract

Exocomets are small bodies releasing gas and dust which orbit stars other than the Sun. Their existence was first inferred from the detection of variable absorption features in stellar spectra in the late 1980s using spectroscopy. More recently, they have been detected through photometric transits from space, and through far-IR/mm gas emission within debris disks. As (exo)comets are considered to contain the most pristine material accessible in stellar systems, they hold the potential to give us information about early stage formation and evolution conditions of extra Solar Systems. In the Solar System, comets carry the physical and chemical memory of the protoplanetary disk environment where they formed, providing relevant information on processes in the primordial solar nebula. The aim of this paper is to compare essential compositional properties between Solar System comets and exocomets. The paper aims to highlight commonalities and to discuss differences which may aid the communication between the involved research communities and perhaps also avoid misconceptions. Exocomets likely vary in their composition depending on their formation environment like Solar System comets do, and since exocomets are not resolved spatially, they pose a challenge when comparing them to high fidelity observations of Solar System comets. Observations of gas around main sequence stars, spectroscopic observations of "polluted" white dwarf atmospheres and spectroscopic observations of transiting exocomets suggest that exocomets may show compositional similarities with Solar System comets. The recent interstellar visitor 2I/Borisov showed gas, dust and nuclear properties similar to that of Solar System comets. This raises the tantalising prospect that observations of interstellar comets may help bridge the fields of exocomet and Solar System comets., Comment: 25 pages, 3 figures. To be published in PASP. This paper is the product of a workshop at the Lorentz Centre in Leiden, the Netherlands

Published
2020
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