The Mg I line: a new probe of the atmospheres of evaporating exoplanets

被引：22
作者：
Bourrier, V. [1 ,2 ,3 ]
des Etangs, A. Lecavelier [1 ,2 ]
Vidal-Madjar, A. [1 ,2 ]
机构：
[1] CNRS, Inst Astrophys Paris, UMR 7095, F-75014 Paris, France
[2] Univ Paris 06, UMR 7095, Inst Astrophys Paris, F-75014 Paris, France
[3] Observ Univ Geneve, CH-1290 Sauverny, Switzerland
来源：
ASTRONOMY & ASTROPHYSICS | 2015年 / 573卷
关键词：
surveys; planets and satellites: atmospheres; methods: numerical; HOT JUPITERS; HD; 209458B; MASS-LOSS; STAR; ABSORPTION; HD209458B; RADIATION; MAGNESIUM; EXOSPHERE; TRANSITS;
D O I：
10.1051/0004-6361/201323266
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
Transit observations of HD 209458b in the UV revealed signatures of neutral magnesium escaping the planet's upper atmosphere. The absorption detected in the Mg I line provides unprecedented information on the physical conditions at the altitude where the atmospheric blow-off takes place. Here we use a 3D model of atmospheric escape to estimate the transit absorption signatures in the Mg I line of their host stars. The detectability of these signatures depends on the brightness of the star and the escape rate of neutral magnesium. We identify a sample of potentially evaporating exoplanets that covers a wide range of stellar and planetary properties, and whose extended exospheres might be detected through Mg I line observations with current UV facilities, allowing further steps in comparative exoplanetology.
引用
收藏
页数：4
相关论文
共 27 条
  • [1] The Chemical Composition of the Sun
    Asplund, Martin
    Grevesse, Nicolas
    Sauval, A. Jacques
    Scott, Pat
    [J]. ANNUAL REVIEW OF ASTRONOMY AND ASTROPHYSICS, VOL 47, 2009, 47 : 481 - 522
  • [2] ON THE EXISTENCE OF ENERGETIC ATOMS IN THE UPPER ATMOSPHERE OF EXOPLANET HD209458b
    Ben-Jaffel, Lotfi
    Hosseini, S. Sona
    [J]. ASTROPHYSICAL JOURNAL, 2010, 709 (02) : 1284 - 1296
  • [3] Modeling magnesium escape from HD 209458b atmosphere
    Bourrier, V.
    des Etangs, A. Lecavelier
    Vidal-Madjar, A.
    [J]. ASTRONOMY & ASTROPHYSICS, 2014, 565
  • [4] 3D model of hydrogen atmospheric escape from HD209458b and HD 189733b: radiative blow-out and stellar wind interactions
    Bourrier, V.
    des Etangs, A. Lecavelier
    [J]. ASTRONOMY & ASTROPHYSICS, 2013, 557
  • [5] Line-profile tomography of exoplanet transits - II. A gas-giant planet transiting a rapidly rotating A5 star☆
    Cameron, A. Collier
    Guenther, E.
    Smalley, B.
    McDonald, I.
    Hebb, L.
    Andersen, J.
    Augusteijn, Th.
    Barros, S. C. C.
    Brown, D. J. A.
    Cochran, W. D.
    Endl, M.
    Fossey, S. J.
    Hartmann, M.
    Maxted, P. F. L.
    Pollacco, D.
    Skillen, I.
    Telting, J.
    Waldmann, I. P.
    West, R. G.
    [J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2010, 407 (01) : 507 - 514
  • [6] A diagram to determine the evaporation status of extrasolar planets
    des Etangs, A. Lecavelier
    [J]. ASTRONOMY & ASTROPHYSICS, 2007, 461 (03): : 1185 - U115
  • [7] Evaporation of the planet HD 189733b observed in H I Lyman-α
    des Etangs, A. Lecavelier
    Ehrenreich, D.
    Vidal-Madjar, A.
    Ballester, G. E.
    Desert, J. -M.
    Ferlet, R.
    Hebrard, G.
    Sing, D. K.
    Tchakoumegni, K. -O.
    Udry, S.
    [J]. ASTRONOMY & ASTROPHYSICS, 2010, 514
  • [8] Atmospheric escape from hot Jupiters
    des Etangs, AL
    Vidal-Madjar, A
    McConnel, JC
    Hébrard, G
    [J]. ASTRONOMY & ASTROPHYSICS, 2004, 418 (01): : L1 - L4
  • [9] Hint of a transiting extended atmosphere on 55 Cancri b
    Ehrenreich, D.
    Bourrier, V.
    Bonfils, X.
    des Etangs, A. Lecavelier
    Hebrard, G.
    Sing, D. K.
    Wheatley, P. J.
    Vidal-Madjar, A.
    Delfosse, X.
    Udry, S.
    Forveille, T.
    Moutou, C.
    [J]. ASTRONOMY & ASTROPHYSICS, 2012, 547
  • [10] Mass-loss rates for transiting exoplanets
    Ehrenreich, D.
    Desert, J. -M.
    [J]. ASTRONOMY & ASTROPHYSICS, 2011, 529
123