SPATIALLY RESOLVED SPECTROSCOPY OF THE EXOPLANET HR 8799 c

被引：82

作者：

Janson, M. ^{[1
]}

Bergfors, C. ^{[2
]}

Goto, M. ^{[2
]}

Brandner, W. ^{[2
]}

Lafreniere, D. ^{[3
]}

机构：

[1] Univ Toronto, Toronto, ON, Canada

[2] Max Planck Inst Astron, D-69117 Heidelberg, Germany

[3] Univ Montreal, Montreal, PQ, Canada

来源：

ASTROPHYSICAL JOURNAL LETTERS | 2010年 / 710卷 / 01期

关键词：

planetary systems; techniques: spectroscopic; INTEGRAL FIELD SPECTROSCOPY; EVOLUTIONARY MODELS; BROWN DWARFS; PLANET; ATMOSPHERES; COMPANION; CONTRAST; SYSTEM; STARS; EARTH;

D O I：

10.1088/2041-8205/710/1/L35

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

HR 8799 is a multi-planet system detected in direct imaging, with three companions known so far. Here, we present spatially resolved Very Large Telescope/NACO 3.88-4.10 mu m spectroscopy of the middle planet, HR 8799 c, which has an estimated mass of similar to 1.0 M-Jup, temperature of similar to 1100 K, and projected separation of 38 AU. The spectrum shows some differences in the continuum from existing theoretical models, particularly longwards of 4 mu m, implying that detailed cloud structure or non-equilibrium conditions may play an important role in the physics of young exoplanetary atmospheres.

引用

收藏

页码：L35 / L38

页数：4

相关论文

共 19 条

[1] Evolutionary models for cool brown dwarfs and extrasolar giant planets. The case of HD 209458 [J].

Baraffe, I ;

Chabrier, G ;

Barman, TS ;

Allard, F ;

Hauschildt, PH .

ASTRONOMY & ASTROPHYSICS, 2003, 402 (02) :701-712

[2] L and T dwarf models and the L to T transition [J].

Burrows, A ;

Sudarsky, D ;

Hubeny, I .

ASTROPHYSICAL JOURNAL, 2006, 640 (02) :1063-1077

[3] Evolutionary models for very low-mass stars and brown dwarfs with dusty atmospheres [J].

Chabrier, G ;

Baraffe, I ;

Allard, F ;

Hauschildt, P .

ASTROPHYSICAL JOURNAL, 2000, 542 (01) :464-472

[4] SOLAR SYSTEM ANALOGS AROUND IRAS-DISCOVERED DEBRIS DISKS [J].

Chen, Christine H. ;

Sheehan, Patrick ;

Watson, Dan M. ;

Manoj, P. ;

Najita, Joan R. .

ASTROPHYSICAL JOURNAL, 2009, 701 (02) :1367-1372

[5] Synthetic spectra and colors of young giant planet atmospheres: Effects of initial conditions and atmospheric metallicity [J].

Fortney, J. J. ;

Marley, M. S. ;

Saumon, D. ;

Lodders, K. .

ASTROPHYSICAL JOURNAL, 2008, 683 (02) :1104-1116

[6] HR 8799:: A link between γ Doradus variables and γ Bootis stars [J].

Gray, RO ;

Kaye, AB .

ASTRONOMICAL JOURNAL, 1999, 118 (06) :2993-2996

[7] A Spitzer spectrum of the exoplanet HD 189733b [J].

Grillmair, C. J. ;

Charbonneau, D. ;

Burrows, A. ;

Armus, L. ;

Stauffer, J. ;

Meadows, V. ;

Van Cleve, J. ;

Levine, D. .

ASTROPHYSICAL JOURNAL, 2007, 658 (02) :L115-L118

[8] A comprehensive examination of the ε Eridani system -: Verification of a 4 micron narrow-band high-contrast imaging approach for planet searches [J].

Janson, M. ;

Reffert, S. ;

Brandner, W. ;

Henning, T. ;

Lenzen, R. ;

Hippler, S. .

ASTRONOMY & ASTROPHYSICS, 2008, 488 (02) :771-780

[9] Integral field spectroscopy of L449-1 - A test case for spectral differential imaging with SINFONI [J].

Janson, M. ;

Brandner, W. ;

Henning, T. .

ASTRONOMY & ASTROPHYSICS, 2008, 478 (02) :597-603

[10] Imaging search for the unseen companion to ε Ind A - improving the detection limits with 4 μm observations [J].

Janson, M. ;

Apai, D. ;

Zechmeister, M. ;

Brandner, W. ;

Kuerster, M. ;

Kasper, M. ;

Reffert, S. ;

Endl, M. ;

Lafreniere, D. ;

Geissler, K. ;

Hippler, S. ;

Henning, Th. .

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2009, 399 (01) :377-384