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Pregled bibliografske jedinice broj: 351593

Časopis

Autori: Dong, Subo; Gould, Andrew; Udalski, Andrzej; Anderson, Jay; Christie, G.; Gaudi, B.S.; Jaroszynski, M.; Kubiak, M.; Szymanski, M.K.; Pietrzynski, G.; Soszynski, I.; Szewczyk, O.; Ulaczyk, K.; Wyrzykowski, L.; DePoy, D.L.; Fox, D.B.; Gal-Yam, A.; Han, C.; Lepine, S.; McCormick, J.; Ofek, E.; Park, B.-G.; Pogge, R.W.; Abe, F.; Bennett, D.P.; Bond, I.A.; Britton, T.R.; Gilmore, A.C.; Hearnshaw, J.B.; Itow, Y.; Kamiya, K.; Kilmartin, P.M.; Korpela, A.; Masuda, K.; Matsubara, Y.; Motomura, M.; Muraki, Y.; Nakamura, S.; Ohnishi, K.; Okada, C.; Rattenbury, N.; Saito, To.; Sako, T.; Sasaki, M.; Sullivan, D.; Sumi, T.; . Tristram, P.J; Yanagisawa, T.; Yock, P.C.M.; Yoshoika, T.; Albrow, M.D.; Beaulieu, J.P.; Brillant, S.; Calitz, H.; Cassan, A.; Cook, K.H.; Coutures, Ch.; Dieters, S.; Dominis Prester, Dijana; Donatowicz, J.; Fouque, P.; Greenhill, J.; Hill, K.; Hoffman, M.; Horne, K.; Jorgensen, U.G.; Kane, S.; Kubas, D.; Marquette, J.B.; Martin, R.; Meintjes, P.; Menzies, J.; Pollard, K.R.; Sahu, K.C.; Vinter, C.; Wambsganss, J.; Williams, A.; Bode, M.; Bramich, D.M.; Burgdorf, M.; Snodgrass, C.; Steele, I.; Doublier, V.; Foelmi, C.
Naslov: OGLE-2005-BLG-071Lb, the Most Massive M-Dwarf Planetary Companion?
Izvornik: Astrophysical Journal (0004-637X) 695 (2009), 2; 970-987
Vrsta rada: članak
Ključne riječi: gravitational lensing; planetary systems; Galaxy: bulge
Sažetak:
We combine all available information to constrain the nature of OGLE-2005-BLG-071Lb, the second planet discovered by microlensing and the first in a high-magnification event. These include photometric and astrometric measurements from Hubble Space Telescope, as well as constraints from higher-order effects extracted from the ground-based light curve, such as microlens parallax, planetary orbital motion and finite-source effects. Our primary analysis leads to the conclusion that the host of Jovian planet OGLE-2005-BLG-071Lb is a foreground M dwarf, with mass M = 0.46 +/- 0.04 Msun, distance D_lens = 3.3 +/- 0.4 kpc, and thick-disk kinematics v_LSR ~ 103 km/s. From the best-fit model, the planet has mass M_p = 3.5 +/- 0.3 M_Jup, lies at a projected separation r_perp = 3.6 +/- 0.2 AU from its host and has an equilibrium temperature of T ~ 50 K, i.e., similar to Neptune. A degenerate model less favored by Deltachi^2 ~ 4 gives essentially the same planetary mass M_p = 3.3 +/- 0.4 M_Jup with a smaller projected separation, r_perp = 2.1 +/- 0.1 AU, and higher equilibrium temperature T ~ 70 K. These results from the primary analysis suggest that OGLE-2005-BLG-071Lb is likely to be the most massive planet yet discovered that is hosted by an M dwarf. However, the formation of such high-mass planetary companions in the outer regions of M-dwarf planetary systems is predicted to be unlikely within the core-accretion scenario. There are a number of caveats to this analysis, but these could mostly be resolved by a single astrometric measurement a few years after the event.
Projekt / tema: 316-0000000-2824
Izvorni jezik: ENG
Rad je indeksiran u
bazama podataka:
Current Contents Connect (CCC)
Scopus
SCI-EXP, SSCI i/ili A&HCI
Science Citation Index Expanded (SCI-EXP) (sastavni dio Web of Science Core Collectiona)
Kategorija: Znanstveni
Znanstvena područja:
Fizika
URL Internet adrese: http://www.iop.org/EJ/article/0004-637X/695/2/970/apj_695_2_970.pdf
http://dx.doi.org/10.1088/0004-637X/695/2/970
Broj citata:
Altmetric:
DOI: 10.1088/0004-637X/695/2/970
URL cjelovitog teksta:
Google Scholar: OGLE-2005-BLG-071Lb, the Most Massive M-Dwarf Planetary Companion?
Upisao u CROSBI: dijana@ffri.hr (dijana@ffri.hr), 12. Svi. 2008. u 14:25 sati



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