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Pregled bibliografske jedinice broj: 324083

Časopis

Autori: Kubas, Daniel; Cassan, Arnaud; Dominik, Martin; Bennett, Dave P.; Wambsganss, Joachim; Beaulieu, Jean-Philippe; Albrow, Michael D.; Batista, Virginie; Bode, M.; Bramich, Daniel M.; Brillant, Stéphane; Burgdorf, M.; Caldwell, John A. R.; Calitz, Hannes; Cook, Kem H.; Coutures, Christian; Dieters, Stefan; Dominis Prester, Dijana; Donatowicz, Jadzia; Fouqué, Pascal; Greenhill, John; Hill, Kym; Hoffman, Matie; Horne, Keith; Jø rgensen, Uffe G.; Kains, Noe; Kane, Stephen; Marquette, Jean-Baptiste; Martin, Ralph; Meintjes, Pieter; Menzies, John; Pollard, Karen R.; Sahu, Kailash C.; Snodgrass, C.; Steele, I.; Tsapras, Y.; Vinter, Christian; Williams, Andrew; Woller, Kristian; Zub, Marta
Naslov: Limits on additional planetary companions to OGLE-2005-BLG-390L
Izvornik: Astronomy and Astrophysics (0004-6361) 483 (2008), 1; 317-324
Vrsta rada: članak
Ključne riječi: techniques microlensing; exoplanets individual OGLE-2005-BLG-390Lb; stars M-dwarfs; stars K-dwarfs
Sažetak:
We investigate constraints on additional planets orbiting the distant M-dwarf star OGLE-2005-BLG-390L, around which photometric microlensing data has revealed the existence of the sub-Neptune-mass planet OGLE-2005-BLG-390Lb. We specifically aim to study potential Jovian companions and compare our findings with predictions from core-accretion and disc-instability models of planet formation. We also obtain an estimate of the detection probability for sub-Neptune mass planets similar to OGLE-2005-BLG-390Lb using a simplified simulation of a microlensing experiment. We compute the efficiency of our photometric data for detecting additional planets around OGLE-2005-BLG-390L, as a function of the microlensing model parameters and convert it into a function of the orbital axis and planet mass by means of an adopted model of the Milky Way. We find that more than 50 % of potential planets with a mass in excess of 1 M_J between 1.1 and 2.3 AU around OGLE-2005-BLG-390L would have revealed their existence, whereas for gas giants above 3 M_J in orbits between 1.5 and 2.2 AU, the detection efficiency reaches 70 % ; however, no such companion was observed. Our photometric microlensing data therefore do not contradict the existence of gas giant planets at any separation orbiting OGLE-2005-BLG-390L. Furthermore we find a detection probability for an OGLE-2005-BLG-390Lb-like planet of around 2-5 %. In agreement with current planet formation theories, this quantitatively supports the prediction that sub-Neptune mass planets are common around low-mass stars.
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
Kategorija: Znanstveni
Znanstvena područja:
Fizika
URL Internet adrese: http://arxiv.org/abs/0710.5306v2
http://arxiv.org/PS_cache/arxiv/pdf/0710/0710.5306v2.pdf
URL cjelovitog teksta:
Google Scholar: Limits on additional planetary companions to OGLE-2005-BLG-390L
Upisao u CROSBI: Dijana Dominis Prester (dijana@ffri.hr), 3. Ožu. 2008. u 13:12 sati



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