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Full characterization of binary-lens event OGLE-2002-BLG-069 from PLANET observations


Kubas, Daniel; Cassan, Arnaud; Beaulieu, J.P.; Coutures, C.; Dominik, M.; Albrow, M. D.; Brillant, S.; Caldwell, J.A.R.; Dominis, Dijana; Donatowicz, J. et al.
Full characterization of binary-lens event OGLE-2002-BLG-069 from PLANET observations // Astronomy & Astrophysics, 435 (2005), 941-948 doi:10.1051/0004-6361:20042624 (međunarodna recenzija, članak, znanstveni)


Naslov
Full characterization of binary-lens event OGLE-2002-BLG-069 from PLANET observations
(Potpuna karakterizacija dogadjaja OGLE-2002-BLG-069 pomocu PLANET opazanja)

Autori
Kubas, Daniel ; Cassan, Arnaud ; Beaulieu, J.P. ; Coutures, C. ; Dominik, M. ; Albrow, M. D. ; Brillant, S. ; Caldwell, J.A.R. ; Dominis, Dijana ; Donatowicz, J. ; Fouque, P. ; Jorgensen, U.G. ; Greenhill, V. J. ; Hill, K. ; Horne, K. ; Kane, S. ; Marquette, J. B. ; Martin, R. ; Menzies, J. ; Pollard, K.R. ; Sahu, K.C. ; Vinter, C. ; Wambsganss, J. ; Watson, R. ; Williams, A. ; Fendt, C. ; Heinmueller, J. ; Thurl, C.

Izvornik
Astronomy & Astrophysics (0004-6361) 435 (2005); 941-948

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Tehinke: gravitacijska mikroleca - zvijezde: modeli atmosfera - zvijezde: rubno zatamnjenje - zvijezde: masa lece
(Techiniques: gravitational microlensing - stars: atmosphere models - stars: limb darkening - stars: lens mass - stars:individual: OGLE-2002-BLG-069)

Sažetak
We analyze the photometric data obtained by PLANET and OGLE on the caustic-crossing binary-lens microlensing event OGLE-2002-BLG-069. Thanks to the excellent photometric and spectroscopic coverage of the event, we are able to constrain the lens model up to the known ambiguity between close and wide binary lenses. The detection of annual parallax in combination with measurements of extended-source effects allows us to determine the mass, distance and velocity of the lens components for the competing models. While the model involving a close binary lens leads to a Bulge-Disc lens scenario with a lens mass of M=(0.51 +- 0.15) M_sol and distance of D_L=(2.9 +- 0.4) kpc, the wide binary lens solution requires a rather implausible binary black-hole lens (M >=126 M_sol). Furthermore we compare current state-of-the-art numerical and empirical models for the surface brightness profile of the source, a G5III Bulge giant. We find that a linear limb-darkening model for the atmosphere of the source star is consistent with the data whereas a PHOENIX atmosphere model assuming LTE and with no free parameter does not match our observations.

Izvorni jezik
Engleski

Znanstvena područja
Fizika



POVEZANOST RADA


Autor s matičnim brojem:
Dijana Dominis Prester, (241452)

Časopis indeksira:


  • Current Contents Connect (CCC)
  • Web of Science Core Collection (WoSCC)
    • SCI-EXP, SSCI i/ili A&HCI
  • Scopus


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