دورية أكاديمية
Exoplanets with ELT-METIS. I. Estimating the direct imaging exoplanet yield around stars within 6.5 parsecs
| العنوان: | Exoplanets with ELT-METIS. I. Estimating the direct imaging exoplanet yield around stars within 6.5 parsecs |
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| المؤلفون: | Bowens, R., Meyer, M. R., Delacroix, Christian, Absil, Olivier, van Boekel, R., Quanz, S. P., Shinde, M., Kenworthy, M., Carlomagno, Brunella, Orban De Xivry, Gilles, Cantalloube, F., Pathak, Prashant |
| المساهمون: | STAR - Space sciences, Technologies and Astrophysics Research - ULiège |
| المصدر: | Astronomy and Astrophysics, 653, A8 (2021-08-31) |
| بيانات النشر: | EDP Sciences, 2021. |
| سنة النشر: | 2021 |
| مصطلحات موضوعية: | infrared: planetary systems, planets and satellites: detection, instrumentation: detectors, Physical, chemical, mathematical & earth Sciences, Space science, astronomy & astrophysics, Physique, chimie, mathématiques & sciences de la terre, Aérospatiale, astronomie & astrophysique |
| الوصف: | Direct imaging is a powerful exoplanet discovery technique that is complementary to other techniques and offers great promise in the era of 30 m class telescopes. Space-based transit surveys have revolutionized our understanding of the frequency of planets at small orbital radii around Sun-like stars. The next generation of extremely large ground-based telescopes will have the angular resolution and sensitivity to directly image planets with R < 4 R[SUB]⊕[/SUB] around the very nearest stars. Here, we predict yields from a direct imaging survey of a volume-limited sample of Sun-like stars with the Mid-Infrared ELT Imager and Spectrograph (METIS) instrument, planned for the 39 m European Southern Observatory Extremely Large Telescope (ELT) that is expected to be operational towards the end of the decade. Using Kepler occurrence rates, a sample of stars with spectral types A-K within 6.5 pc, and simulated contrast curves based on an advanced model of what is achievable from coronagraphic imaging with adaptive optics, we estimated the expected yield from METIS using Monte Carlo simulations. We find the METIS expected yield of planets in the N2 band (10.10−12.40 μm) is 1.14 planets, which is greater than comparable observations in the L (3.70−3.95 μm) and M (4.70−4.90 μm) bands. We also determined a 24.6% chance of detecting at least one Jovian planet in the background limited regime assuming a 1 h integration. We calculated the yield per star and estimate optimal observing revisit times to increase the yield. We also analyzed a northern hemisphere version of this survey and found there are additional targets worth considering. In conclusion, we present an observing strategy aimed to maximize the possible yield for limited telescope time, resulting in 1.48 expected planets in the N2 band. EPIC; NNExI |
| نوع الوثيقة: | journal article http://purl.org/coar/resource_type/c_6501 article peer reviewed |
| اللغة: | English |
| Relation: | info:eu-repo/grantAgreement/EC/H2020/819155; https://ui.adsabs.harvard.edu/abs/2021A&A...653A...8B; urn:issn:0004-6361; urn:issn:1432-0746 |
| DOI: | 10.1051/0004-6361/202141109 |
| URL الوصول: | https://orbi.uliege.be/handle/2268/265108 |
| حقوق: | open access http://purl.org/coar/access_right/c_abf2 info:eu-repo/semantics/openAccess |
| رقم الأكسشن: | edsorb.265108 |
| قاعدة البيانات: | ORBi |
| DOI: | 10.1051/0004-6361/202141109 |
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