2001A&A...378.1014A -
Astronomy and Astrophysics, volume 378, 1014-1023 (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.
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Syntax of coordinates is : "ra dec (wtype) [error ellipse] quality bibcode" :
ra dec : right ascension and declination (unit and frame defined according to your Output Options)
Grey values are increasing the original precision due to the computation of frame transformations
(wtype) : wavelength class for the origin of the coordinates (Rad, mm, IR, Optical, UV, Xray, Gam)
[error ellipse] : measurement uncertainty, on (ra,dec) if the positional angle is 90 degrees, on (majaxis,minaxis) otherwise (in mas at defined epoch in the original catalogue),
position angle (in degrees North celestial pole to East)
Syntax of coordinates is : "ra dec (wtype) [error ellipse] quality bibcode" :
ra dec : right ascension and declination (unit and frame defined according to your Output Options)
Grey values are increasing the original precision due to the computation of frame transformations
(wtype) : wavelength class for the origin of the coordinates (Rad, mm, IR, Optical, UV, Xray, Gam)
[error ellipse] : measurement uncertainty, on (ra,dec) if the positional angle is 90 degrees, on (majaxis,minaxis) otherwise (in mas at defined epoch in the original catalogue),
position angle (in degrees North celestial pole to East)
quality : flag of quality
E ≥ 10"
D : 1-10" (and some old data)
C : 0.1-1"
B : 0.01-0.1" + 2MASS, Tyc
A : VLBI, Hipparcos
bibcode : bibcode of the coordinates reference
FK4
coord.
(ep=B1950 eq=1950) :
17 49 57.65 -30 54 57.5
[
60 60 90
]
Syntax of coordinates is : "ra dec (wtype) [error ellipse] quality bibcode" :
ra dec : right ascension and declination (unit and frame defined according to your Output Options)
Grey values are increasing the original precision due to the computation of frame transformations
(wtype) : wavelength class for the origin of the coordinates (Rad, mm, IR, Optical, UV, Xray, Gam)
[error ellipse] : measurement uncertainty, on (ra,dec) if the positional angle is 90 degrees, on (majaxis,minaxis) otherwise (in mas at defined epoch in the original catalogue),
position angle (in degrees North celestial pole to East)
quality : flag of quality
E ≥ 10"
D : 1-10" (and some old data)
C : 0.1-1"
B : 0.01-0.1" + 2MASS, Tyc
A : VLBI, Hipparcos
bibcode : bibcode of the coordinates reference
Gal
coord.
(ep=J2000) :
359.13565 -02.42967
[
60 60 90
]
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temperature class, eventually a luminosity class (roman number)
and/or spectral peculiarities;
References (36 between 1850 and 2023) (Total 36)
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