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- Chauvin, G. (author)
Discovery of a warm, dusty giant planet around HIP 65426
- Article/chapterEnglish2017
Publisher, publication year, extent ...
- 2017-09-18
- EDP Sciences,2017
- printrdacarrier
Numbers
- LIBRIS-ID:oai:DiVA.org:su-148893
- https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-148893URI
- https://doi.org/10.1051/0004-6361/201731152DOI
Supplementary language notes
- Language:English
- Summary in:English
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- SwePubSwePub
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- Aims. The SHINE program is a high-contrast near-infrared survey of 600 young, nearby stars aimed at searching for and characterizing new planetary systems using VLT/SPHERE's unprecedented high-contrast and high-angular-resolution imaging capabilities. It is also intended to place statistical constraints on the rate, mass and orbital distributions of the giant planet population at large orbits as a function of the stellar host mass and age to test planet-formation theories.Methods. We used the IRDIS dual-band imager and the IFS integral field spectrograph of SPHERE to acquire high-contrast coronagraphic differential near-infrared images and spectra of the young A2 star HIP 65426. It is a member of the similar to 17 Myr old Lower Centaurus-Crux association. Results. At a separation of 830 mas (92 au projected) from the star, we detect a faint red companion. Multi-epoch observations confirm that it shares common proper motion with HIP 65426. Spectro-photometric measurements extracted with IFS and IRDIS between 0.95 and 2.2 mu m indicate a warm, dusty atmosphere characteristic of young low-surface-gravity L5-L7 dwarfs. Hot-start evolutionary models predict a luminosity consistent with a 6-12 M-Jup, T-eff = 1300-1600K and R = 1.5 +/- 0.1 R-Jup giant planet. Finally, the comparison with Exo-REM and PHOENIX BT-Settl synthetic atmosphere models gives consistent effective temperatures but with slightly higher surface gravity solutions of log(g) = 4.0-5.0 with smaller radii (1.0-1.3 R-Jup).Conclusions. Given its physical and spectral properties, HIP 65426 b occupies a rather unique placement in terms of age, mass, and spectral-type among the currently known imaged planets. It represents a particularly interesting case to study the presence of clouds as a function of particle size, composition, and location in the atmosphere, to search for signatures of non-equilibrium chemistry, and finally to test the theory of planet formation and evolution.
Subject headings and genre
- NATURVETENSKAP Fysik hsv//swe
- NATURAL SCIENCES Physical Sciences hsv//eng
- instrumentation: adaptive optics
- instrumentation: high angular resolution
- methods: observational
- planets and satellites: atmospheres
- planets and satellites: formation
Added entries (persons, corporate bodies, meetings, titles ...)
- Desidera, S. (author)
- Lagrange, A. -M. (author)
- Vigan, A. (author)
- Gratton, R. (author)
- Langlois, M. (author)
- Bonnefoy, M. (author)
- Beuzit, J. -L. (author)
- Feldt, M. (author)
- Mouillet, D. (author)
- Meyer, M. (author)
- Cheetham, A. (author)
- Biller, B. (author)
- Boccaletti, A. (author)
- D'Orazi, V. (author)
- Galicher, R. (author)
- Hagelberg, J. (author)
- Maire, A. -L. (author)
- Mesa, D. (author)
- Olofsson, J. (author)
- Samland, M. (author)
- Schmidt, T. O. B. (author)
- Sissa, E. (author)
- Bonavita, M. (author)
- Charnay, B. (author)
- Cudel, M. (author)
- Daemgen, S. (author)
- Delorme, P. (author)
- Janin-Potiron, P. (author)
- Janson, MarkusStockholms universitet,Institutionen för astronomi,Max Planck Institute for Astronomy, Germany(Swepub:su)mjanso (author)
- Keppler, M. (author)
- Le Coroller, H. (author)
- Ligi, R. (author)
- Marleau, G. D. (author)
- Messina, S. (author)
- Molliere, P. (author)
- Mordasini, C. (author)
- Müller, A. (author)
- Peretti, S. (author)
- Perrot, C. (author)
- Rodet, L. (author)
- Rouan, D. (author)
- Zurlo, A. (author)
- Dominik, C. (author)
- Henning, T. (author)
- Menard, F. (author)
- Schmid, H. -M. (author)
- Turatto, M. (author)
- Udry, S. (author)
- Vakili, F. (author)
- Abe, L. (author)
- Antichi, J. (author)
- Baruffolo, A. (author)
- Baudoz, P. (author)
- Baudrand, J. (author)
- Blanchard, P. (author)
- Bazzon, A. (author)
- Buey, T. (author)
- Carbillet, M. (author)
- Carle, M. (author)
- Charton, J. (author)
- Cascone, E. (author)
- Claudi, R. (author)
- Costille, A. (author)
- Deboulbe, A. (author)
- De Caprio, V. (author)
- Dohlen, K. (author)
- Fantinel, D. (author)
- Feautrier, P. (author)
- Fusco, T. (author)
- Gigan, P. (author)
- Giro, E. (author)
- Gisler, D. (author)
- Gluck, L. (author)
- Hubin, N. (author)
- Hugot, E. (author)
- Jaquet, M. (author)
- Kasper, M. (author)
- Madec, F. (author)
- Magnard, Y. (author)
- Martinez, P. (author)
- Maurel, D. (author)
- Le Mignant, D. (author)
- Moeller-Nilsson, O. (author)
- Llored, M. (author)
- Moulin, T. (author)
- Origne, A. (author)
- Pavlov, A. (author)
- Perret, D. (author)
- Petit, C. (author)
- Pragt, J. (author)
- Puget, P. (author)
- Rabou, P. (author)
- Ramos, J. (author)
- Rigal, R. (author)
- Rochat, S. (author)
- Roelfsema, R. (author)
- Rousset, G. (author)
- Roux, A. (author)
- Salasnich, B. (author)
- Sauvage, J. -F. (author)
- Sevin, A. (author)
- Soenke, C. (author)
- Stadler, E. (author)
- Suarez, M. (author)
- Weber, L. (author)
- Wildi, F. (author)
- Antoniucci, S. (author)
- Augereau, J. -C. (author)
- Baudino, J. -L. (author)
- Brandner, W. (author)
- Engler, N. (author)
- Girard, J. (author)
- Gry, C. (author)
- Kral, Q. (author)
- Kopytova, T. (author)
- Lagadec, E. (author)
- Milli, J. (author)
- Moutou, C. (author)
- Schlieder, J. (author)
- Szulagyi, J. (author)
- Thalmann, C. (author)
- Wahhaj, Z. (author)
- Stockholms universitetInstitutionen för astronomi (creator_code:org_t)
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- Chauvin, G.
- Desidera, S.
- Lagrange, A. -M.
- Vigan, A.
- Gratton, R.
- Langlois, M.
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- Bonnefoy, M.
- Beuzit, J. -L.
- Feldt, M.
- Mouillet, D.
- Meyer, M.
- Cheetham, A.
- Biller, B.
- Boccaletti, A.
- D'Orazi, V.
- Galicher, R.
- Hagelberg, J.
- Maire, A. -L.
- Mesa, D.
- Olofsson, J.
- Samland, M.
- Schmidt, T. O. B ...
- Sissa, E.
- Bonavita, M.
- Charnay, B.
- Cudel, M.
- Daemgen, S.
- Delorme, P.
- Janin-Potiron, P ...
- Janson, Markus
- Keppler, M.
- Le Coroller, H.
- Ligi, R.
- Marleau, G. D.
- Messina, S.
- Molliere, P.
- Mordasini, C.
- Müller, A.
- Peretti, S.
- Perrot, C.
- Rodet, L.
- Rouan, D.
- Zurlo, A.
- Dominik, C.
- Henning, T.
- Menard, F.
- Schmid, H. -M.
- Turatto, M.
- Udry, S.
- Vakili, F.
- Abe, L.
- Antichi, J.
- Baruffolo, A.
- Baudoz, P.
- Baudrand, J.
- Blanchard, P.
- Bazzon, A.
- Buey, T.
- Carbillet, M.
- Carle, M.
- Charton, J.
- Cascone, E.
- Claudi, R.
- Costille, A.
- Deboulbe, A.
- De Caprio, V.
- Dohlen, K.
- Fantinel, D.
- Feautrier, P.
- Fusco, T.
- Gigan, P.
- Giro, E.
- Gisler, D.
- Gluck, L.
- Hubin, N.
- Hugot, E.
- Jaquet, M.
- Kasper, M.
- Madec, F.
- Magnard, Y.
- Martinez, P.
- Maurel, D.
- Le Mignant, D.
- Moeller-Nilsson, ...
- Llored, M.
- Moulin, T.
- Origne, A.
- Pavlov, A.
- Perret, D.
- Petit, C.
- Pragt, J.
- Puget, P.
- Rabou, P.
- Ramos, J.
- Rigal, R.
- Rochat, S.
- Roelfsema, R.
- Rousset, G.
- Roux, A.
- Salasnich, B.
- Sauvage, J. -F.
- Sevin, A.
- Soenke, C.
- Stadler, E.
- Suarez, M.
- Weber, L.
- Wildi, F.
- Antoniucci, S.
- Augereau, J. -C.
- Baudino, J. -L.
- Brandner, W.
- Engler, N.
- Girard, J.
- Gry, C.
- Kral, Q.
- Kopytova, T.
- Lagadec, E.
- Milli, J.
- Moutou, C.
- Schlieder, J.
- Szulagyi, J.
- Thalmann, C.
- Wahhaj, Z.
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