Keck Observations Confirm a Super-Jupiter Planet Orbiting M-dwarf OGLE-2005-BLG-071L
| Autor: | Calen B. Henderson, J.-P. Beaulieu, Jessica R. Lu, Sean K. Terry, Aikaterini Vandorou, J. B. Marquette, Naoki Koshimoto, J. W. Blackman, Andrew A. Cole, David P. Bennett, Andrzej Udalski, Clément Ranc, Aparna Bhattacharya |
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| Přispěvatelé: | Institut d'Astrophysique de Paris (IAP), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC), Department of Chemistry [Berkeley], University of California [Berkeley], University of California-University of California |
| Rok vydání: | 2019 |
| Předmět: |
Proper motion
010504 meteorology & atmospheric sciences FOS: Physical sciences Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics Gravitational microlensing 01 natural sciences Jupiter Planet 0103 physical sciences Astrophysics::Solar and Stellar Astrophysics 010303 astronomy & astrophysics Astrophysics::Galaxy Astrophysics 0105 earth and related environmental sciences Physics Earth and Planetary Astrophysics (astro-ph.EP) Very Large Telescope Astrophysics::Instrumentation and Methods for Astrophysics Astronomy and Astrophysics Light curve Exoplanet 13. Climate action Space and Planetary Science Astrophysics::Earth and Planetary Astrophysics [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph] Planetary mass Astrophysics - Earth and Planetary Astrophysics |
| Zdroj: | The Astronomical Journal The Astronomical Journal, American Astronomical Society, 2019, 159 (2), ⟨10.3847/1538-3881/ab6212⟩ |
| ISSN: | 0004-6256 1538-3881 |
| DOI: | 10.48550/arxiv.1909.04740 |
| Popis: | We present adaptive optics imaging from the NIRC2 instrument on the Keck-2 telescope that resolves the exoplanet host (and lens) star as it separates from the brighter source star. These observations yield the $K$-band brightness of the lens and planetary host star, as well as the lens-source relative proper motion, $��_{\rm rel,H}$. in the heliocentric reference frame. The $��_{\rm rel,H}$ measurement allows determination of the microlensing parallax vector, $��_E$, which had only a single component determined by the microlensing light curve. The combined measurements of $��_{\rm rel,H}$ and $K_L$ provide the masses of the host stat, $M_{\rm host} = 0.426\pm 0.037 M_\odot$, and planet, $m_p = 3.27 \pm 0.32 M_{\rm Jup}$ with a projected separation of $3.4\pm 0.5\,$AU. This confirms the tentative conclusion of a previous paper (Dong et al. 2009) that this super-Jupiter mass planet, OGLE-2005-BLG-071Lb, orbits an M-dwarf. Such planets are predicted to be rare by the core accretion theory and have been difficult to find with other methods, but there are two such planets with firm mass measurements from microlensing, and an additional 11 planetary microlens events with host mass estimates $< 0.5M_\odot$ and planet mass estimates $> 2$ Jupiter masses that could be confirmed by high angular follow-up observations. We also point out that OGLE-2005-BLG-071L has separated far enough from its host star that it should be possible to measure the host star metallicity withspectra from a high angular resolution telescope such as Keck, the VLT, the Hubble Space Telescope or the James Webb Space Telescope. accepted by AJ |
| Databáze: | OpenAIRE |
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