Probing the atmosphere of a solar-like star by galactic microlensing at high magnification

被引：37

作者：

Abe, F

Bennett, DP

Bond, IA ^{[1
]}

Calitz, JJ

Claret, A

Cook, KH

Furuta, Y

Gal-Yam, A

Glicenstein, JF

Hearnshaw, JB

Hauschildt, PH

Kent, D

Kilmartin, PM

Kurata, Y

Masuda, K

Maoz, D

Matsubara, Y

Meintjes, PJ

Moniez, M

Muraki, Y

Noda, S

Ofek, EO

Okajima, K

Philpott, L

Rattenbury, NJ

Rhie, SH

Sako, T

Sullivan, DJ

Sumi, T

Terndrup, DM

Tristram, PJ

Yanagisawa, T

Yock, PCM

机构：

[1] Univ Edinburgh, Inst Astron, Edinburgh EH9 3HJ, Midlothian, Scotland

[2] Nagoya Univ, Solar Terr Environm Lab, Nagoya, Aichi 46401, Japan

[3] Univ Notre Dame, Dept Phys, Notre Dame, IN 46556 USA

[4] Univ Orange Free State, Dept Phys, ZA-9300 Bloemfontein, South Africa

[5] CSIC, Inst Astrofis Andalucia, Granada 18080, Spain

[6] Lawrence Livermore Natl Lab, Inst Geophys & Planetary Phys, Livermore, CA 94563 USA

[7] Tel Aviv Univ, Sch Phys & Astron, IL-69978 Tel Aviv, Israel

[8] Ctr Etud Saclay, CEA, DSM, DAPNIA, F-91191 Gif Sur Yvette, France

[9] Univ Canterbury, Dept Phys & Astron, Christchurch 1, New Zealand

[10] Univ Hamburg, Sternwarte, D-21029 Hamburg, Germany

[11] Univ Paris 11, CNRS, IN2P3, Lab Accelerateur Lineaire, F-91405 Orsay, France

[12] Univ Auckland, Fac Sci, Auckland 1, New Zealand

[13] Univ Victoria, Sch Chem & Phys Sci, Wellington, New Zealand

[14] Princeton Univ, Dept Astrophys Sci, Princeton, NJ 08544 USA

[15] Ohio State Univ, Dept Astron, Columbus, OH 43210 USA

来源：

ASTRONOMY & ASTROPHYSICS | 2003年 / 411卷 / 03期

关键词：

techniques : high angular resolution; techniques : gravitational microlensing; stars : limb darkening; stars : individual : MOA-2002-BLG-33;

D O I：

10.1051/0004-6361:20031602

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We report a measurement of limb darkening of a solar-like star in the very high magnification microlensing event MOA 2002-BLG-33. A 15 hour deviation from the light curve profile expected for a single lens was monitored intensively in V and I passbands by five telescopes spanning the globe. Our modelling of the light curve showed the lens to be a close binary system whose centre-of-mass passed almost directly in front of the source star. The source star was identified as an F8-G2 main sequence turn-off star. The measured stellar profiles agree with current stellar atmosphere theory to within similar to4% in two passbands. The effective angular resolution of the measurements is <1 μas. These are the first limb darkening measurements obtained by microlensing for a Solar-like star.

引用

页码：L493 / L496

页数：4

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