Characterization of the hot Neptune GJ 436 b with Spitzer and ground-based observations

被引：84
|
作者：
Demory, B. -O. [1 ]
Gillon, M.
Barman, T.
Bonfils, X.
Mayor, M.
Mazeh, T.
Queloz, D.
Udry, S.
Bouchy, F.
Delfosse, X.
Forveille, T.
Mallmann, F.
Pepe, F.
Perrier, C.
机构：
[1] Univ Geneva, Observ Geneva, CH-1290 Sauverny, Switzerland
[2] Univ Liege, Inst Astropjys & Geophys, B-4000 Liege, Belgium
[3] Lowell Observ, Flagstaff, AZ 86001 USA
[4] Astron Observ, P-1349 Lisbon, Portugal
[5] Tel Aviv Univ, Raymond & Beverly Sackler Fac Exact Sci, Sch Phys & Astron, IL-69978 Tel Aviv, Israel
[6] Univ Grenoble 1, Observ Grenoble, Astrophys Lab, F-38041 Grenoble, France
[7] CNRS, F-38041 Grenoble, France
[8] OFXB, CH-3961 St Luc, Switzerland
[9] Univ Paris 06, CNRS, Inst Astrophys, UMR 7095, F-75014 Paris, France
来源：
ASTRONOMY & ASTROPHYSICS | 2007年 / 475卷 / 03期
关键词：
techniques : photometric; techniques : spectroscopic; eclipses; stars : individual : GJ 436; planetary systems; infrared : general;
D O I：
10.1051/0004-6361:20078354
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We present Spitzer Space Telescope infrared photometry of a secondary eclipse of the hot Neptune GJ 436 b. The observations were obtained using the 8-mu m band of the InfraRed Array Camera (IRAC). The data spanning the predicted time of secondary eclipse show a clear flux decrement with the expected shape and duration. The observed eclipse depth of 0.58 mmag allows us to estimate a blackbody brightness temperature of T-p = 717 +/- 35 K at 8 mu m. We compare this infrared flux measurement to a model of the planetary thermal emission, and show that this model reproduces properly the observed flux decrement. The timing of the secondary eclipse confirms the non-zero orbital eccentricity of the planet, while also increasing its precision (e = 0.14 +/- 0.01). Additional new spectroscopic and photometric observations allow us to estimate the rotational period of the star and to assess the potential presence of another planet.
引用
收藏
页码：1125 / 1129
页数：5
相关论文
共 50 条
  • [41] A global analysis of Spitzer and new HARPS data confirms the loneliness and metal-richness of GJ 436 b
    Lanotte, A. A.
    Gillon, M.
    Demory, B. -O.
    Fortney, J. J.
    Astudillo, N.
    Bonfils, X.
    Magain, P.
    Delfosse, X.
    Forveille, T.
    Lovis, C.
    Mayor, M.
    Neves, V.
    Pepe, F.
    Queloz, D.
    Santos, N.
    Udry, S.
    ASTRONOMY & ASTROPHYSICS, 2014, 572
  • [42] Neptune at summer solstice: Zonal mean temperatures from ground-based observations, 2003-2007
    Fletcher, Leigh N.
    de Pater, Imke
    Orton, Glenn S.
    Hammel, Heidi B.
    Sitko, Michael L.
    Irwin, Patrick G. J.
    ICARUS, 2014, 231 : 146 - 167
  • [43] SPITZER OBSERVATIONS OF GJ 3470 b: A VERY LOW-DENSITY NEPTUNE-SIZE PLANET ORBITING A METAL-RICH M DWARF
    Demory, Brice-Olivier
    Torres, Guillermo
    Neves, Vasco
    Rogers, Leslie
    Gillon, Michael
    Horch, Elliott
    Sullivan, Peter
    Bonfils, Xavier
    Delfosse, Xavier
    Forveille, Thierry
    Lovis, Christophe
    Mayor, Michel
    Santos, Nuno
    Seager, Sara
    Smalley, Barry
    Udry, Stephane
    ASTROPHYSICAL JOURNAL, 2013, 768 (02):
  • [44] Multiple asteroid systems: Dimensions and thermal properties from Spitzer Space Telescope and ground-based observations
    Marchis, F.
    Enriquez, J. E.
    Emery, J. P.
    Mueller, M.
    Baek, M.
    Pollock, J.
    Assafin, M.
    Vieira Martins, R.
    Berthier, J.
    Vachier, F.
    Cruikshank, D. P.
    Lim, L. F.
    Reichart, D. E.
    Ivarsen, K. M.
    Haislip, J. B.
    LaCluyze, A. P.
    ICARUS, 2012, 221 (02) : 1130 - 1161
  • [45] Refined Ephemeris for Four Hot Jupiters Using Ground-Based and TESS Observations
    Davoudi, F.
    MirshafieKhozani, P.
    Paki, E.
    Roshana, M.
    Hasheminasab, F.
    MazidabadiFarahani, A.
    Farahani, F. Ahangarani
    Farjadnia, T.
    Nasrollahzadeh, F.
    Rezvanpanah, S.
    Mousavi, S. M.
    Foroughi, R.
    Poro, A.
    Ghalee, A.
    ASTRONOMY LETTERS-A JOURNAL OF ASTRONOMY AND SPACE ASTROPHYSICS, 2021, 47 (09): : 638 - 650
  • [46] Refined Ephemeris for Four Hot Jupiters Using Ground-Based and TESS Observations
    F. Davoudi
    P. MirshafieKhozani
    E. Paki
    M. Roshana
    F. Hasheminasab
    A. MazidabadiFarahani
    F. Ahangarani Farahani
    T. Farjadnia
    F. Nasrollahzadeh
    S. Rezvanpanah
    S. M. Mousavi
    R. Foroughi
    A. Poro
    A. Ghalee
    Astronomy Letters, 2021, 47 : 638 - 650
  • [47] KEPLER AND GROUND-BASED TRANSITS OF THE EXO-NEPTUNE HAT-P-11b
    Deming, Drake
    Sada, Pedro V.
    Jackson, Brian
    Peterson, Steven W.
    Agol, Eric
    Knutson, Heather A.
    Jennings, Donald E.
    Haase, Flynn
    Bays, Kevin
    ASTROPHYSICAL JOURNAL, 2011, 740 (01):
  • [48] The effect of Lyman α radiation on mini-Neptune atmospheres around M stars: application to GJ 436b
    Miguel, Yamila
    Kaltenegger, Lisa
    Linsky, Jeffrey L.
    Rugheimer, Sarah
    MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2015, 446 (01) : 345 - 353
  • [49] A SPITZER TRANSMISSION SPECTRUM FOR THE EXOPLANET GJ 436b, EVIDENCE FOR STELLAR VARIABILITY, AND CONSTRAINTS ON DAYSIDE FLUX VARIATIONS
    Knutson, Heather A.
    Madhusudhan, Nikku
    Cowan, Nicolas B.
    Christiansen, Jessie L.
    Agol, Eric
    Deming, Drake
    Desert, Jean-Michel
    Charbonneau, David
    Henry, Gregory W.
    Homeier, Derek
    Langton, Jonathan
    Laughlin, Gregory
    Seager, Sara
    ASTROPHYSICAL JOURNAL, 2011, 735 (01):
  • [50] A ground-based transmission spectrum of the super-Earth exoplanet GJ 1214b
    Bean, Jacob L.
    Kempton, Eliza Miller-Ricci
    Homeier, Derek
    NATURE, 2010, 468 (7324) : 669 - 672
12345