Arid
DOI10.1093/mnras/stu2036
ExELS: an exoplanet legacy science proposal for the ESA Euclid mission - II. Hot exoplanets and sub-stellar systems
McDonald, I.1; Kerins, E.1; Penny, M.1,2; Beaulieu, J. -P.3; Batista, V.2; Novati, S. Calchi4,5,6; Cassan, A.3; Fouque, P.7; Mao, S.1,8; Marquette, J. B.3; Rattenbury, N.1; Robin, A. C.9; Tisserand, P.10; Zapatero Osorio, M. R.11
来源期刊MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
ISSN0035-8711
EISSN1365-2966
出版年2014
卷号445期号:4页码:4137-4154
英文摘要

The Exoplanet Euclid Legacy Survey (ExELS) proposes to determine the frequency of cold exoplanets down to Earth mass from host separations of similar to 1 au out to the free-floating regime by detecting microlensing events in Galactic bulge. We show that ExELS can also detect large numbers of hot, transiting exoplanets in the same population. The combined microlensing+transit survey would allow the first self-consistent estimate of the relative frequencies of hot and cold sub-stellar companions, reducing biases in comparing ’near-field’ radial velocity and transiting exoplanets with ’far-field’ microlensing exoplanets. The age of the bulge and its spread in metallicity further allows ExELS to better constrain both the variation of companion frequency with metallicity and statistically explore the strength of star-planet tides. We conservatively estimate that ExELS will detect similar to 4100 sub-stellar objects, with sensitivity typically reaching down to Neptune-mass planets. Of these, similar to 600 will be detectable in both Euclid’s VIS (optical) channel and Near Infrared Spectrometer and Photometer (NISP)-H-band imager, with similar to 90 per cent of detections being hot Jupiters. Likely scenarios predict a range of 2900-7000 for VIS and 400-1600 for H band. Twice as many can be expected in VIS if the cadence can be increased to match the 20-min H-band cadence. The separation of planets from brown dwarfs via Doppler boosting or ellipsoidal variability will be possible in a handful of cases. Radial velocity confirmation should be possible in some cases, using 30m-class telescopes. We expect secondary eclipses, and reflection and emission from planets to be detectable in up to similar to 100 systems in both VIS and NISP-H. Transits of similar to 500 planetary-radius companions will be characterized with two-colour photometry and similar to 40 with four-colour photometry (VIS, YJH), and the albedo of (and emission from) a large sample of hot Jupiters in the H band can be explored statistically.


英文关键词planets and satellites: detection planet star interactions stars: low-mass planetary systems stars: variables: general Galaxy: bulge
类型Article
语种英语
国家England ; USA ; France ; Italy ; Peoples R China ; Australia ; Spain
收录类别SCI-E
WOS记录号WOS:000346963300062
WOS关键词EXTRASOLAR PLANET CANDIDATES ; GAS-GIANT PLANET ; SOLAR-TYPE STARS ; HYDROGEN-BURNING LIMIT ; BROWN-DWARF DESERT ; GALACTIC BULGE ; TRANSITING EXOPLANETS ; ELEMENT ABUNDANCES ; OMEGA-CENTAURI ; LIGHT CURVES
WOS类目Astronomy & Astrophysics
WOS研究方向Astronomy & Astrophysics
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/183916
作者单位1.Univ Manchester, Sch Phys & Astron, Jodrell Bank Ctr Astrophys, Manchester M13 9PL, Lancs, England;
2.Ohio State Univ, Dept Astron, Columbus, OH 43210 USA;
3.Univ Paris 06, Inst Astrophys Paris, CNRS UMR7095, F-75014 Paris, France;
4.Univ Salerno, Dipartimento Fis ER Caianiello, I-84084 Fisciano, SA, Italy;
5.IIASS, I-84019 Vietri Sul Mare, SA, Italy;
6.CALTECH, NASA Exoplanet Sci Inst, Pasadena, CA 91125 USA;
7.Univ Toulouse, CNRS, IRAP, F-31400 Toulouse, France;
8.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China;
9.Univ Franche Comte, CNRS UMR6213, Inst Utinam, OSU THETA Franche Comte Bourgogne, F-25010 Besancon, France;
10.Australian Natl Univ, Res Sch Astron & Astrophys, Weston, ACT 2611, Australia;
11.Ctr Astrobiol CSIC INTA, E-28850 Madrid, Spain
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McDonald, I.,Kerins, E.,Penny, M.,et al. ExELS: an exoplanet legacy science proposal for the ESA Euclid mission - II. Hot exoplanets and sub-stellar systems[J],2014,445(4):4137-4154.
APA McDonald, I..,Kerins, E..,Penny, M..,Beaulieu, J. -P..,Batista, V..,...&Zapatero Osorio, M. R..(2014).ExELS: an exoplanet legacy science proposal for the ESA Euclid mission - II. Hot exoplanets and sub-stellar systems.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,445(4),4137-4154.
MLA McDonald, I.,et al."ExELS: an exoplanet legacy science proposal for the ESA Euclid mission - II. Hot exoplanets and sub-stellar systems".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 445.4(2014):4137-4154.
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