2001A&A...378.1014A

Query : 2001A&A...378.1014A

2001A&A...378.1014A - Astronomy and Astrophysics, volume 3781014-1023 (2001/11-2)

Photometric constraints on microlens spectroscopy of EROS-BLG-2000-5.

AFONSO C., ALBERT J.N., ANDERSEN J., ANSARI R., AUBOURG E., BAREYRE P., BAUER F., BLANC G., BOUQUET A., CHAR S., CHARLOT X., COUCHOT F., COUTURES C., DERUE F., FERLET R., FOUQUE P., GLICENSTEIN J.F., GOLDMAN B., GOULD A., GRAFF D., GROS M., HAIESSINSKI J., HAMILTON J.C., HARDIN D., DE KAT J., KIM A., LASSERRE T., LE GUILLOU L., LESQUOY E., LOUP C., MAGNEVILLE C., MANSOUX B., MARQUETTE J.B., MAURICE E., MILSZTAJN A., MONIEZ M., PALANQUE-DELABROUILLE N., PERDEREAU O., PREVOT L., REGNAULT N., RICH J., SPIRO M., VIDAL-MADJAR A., VIGROUX L. and ZYLBERAJCH S.

Abstract (from CDS):

We apply EROS photometric data to interpret previously published Keck and VLT spectra of the binary-microlens caustic-crossing event EROS-BLG-2000-5. We show that the VLT data imply that the outer ∼4% of the limb of the K3-giant source is strongly in emission in Hα, in contradiction to available models of the photosphere. This conflict could be resolved if the integrated Hα emission from the chromosphere were equal to 8% of the integrated Hα absorption from the source as a whole. These conclusions regarding the extreme limb are almost completely model-independent. We also present a general method for using the photometric data to facilitate direct comparison between the atmospheric model and the spectroscopic data. While this method has some model-dependent features, it is fairly robust and can serve to guide the analysis of spectra while more detailed models of the lens geometry are being developed. In addition, we find that the color of the limb of the source (outer 5.5% by radius) is Δ(V-I)∼0.37 redder than the source as a whole, so that it has the color of a M0 giant.

Abstract Copyright: ∼

Journal keyword(s): gravitational lensing - techniques: high angular resolution - techniques: spectroscopic - stars: atmospheres

Simbad objects: 1

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Number of rows : 1

N	Identifier	Otype	ICRS (J2000) RA	ICRS (J2000) DEC	Mag U	Mag B	Mag V	Mag R	Mag I	Sp type	#ref 1850 - 2026	#notes
1	EROS BLG 2000 5	*	17 53 11.43	-30 55 34.4						K3III	37	0

Query : 2001A&A...378.1014A

Basic data :

EROS BLG 2000 5 -- Star

* (), NIR (2MASS)

17 53 11.43 -30 55 34.4 (Infrared) [ 60 60 90 ] C 2003yCat.2246....0C

17 49 57.65 -30 54 57.5 [ 60 60 90 ]

359.13565 -02.42967 [ 60 60 90 ]

K3III C 2010A&A...518A..51F

J 12.751 [0.027] C 2003yCat.2246....0C

H 11.719 [0.025] C 2003yCat.2246....0C

K 11.306 [0.020] C 2003yCat.2246....0C

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2MASS J17531143-3055344 EROS BLG 2000 5 TIC 256672263

References (37 between 1850 and 2026) (Total 37)
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