Article (Scientific journals)
First spectroscopic evidence of microlensing on a BAL quasar? The case of H 1413 + 117
Angonin, M.-C.; Vanderriest, C.; Remy, M. et al.
1990In Astronomy and Astrophysics, 233, p. 5-L8
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Keywords :
IMAGING TECHNIQUES; LINE SPECTRA; QUASARS; CASSEGRAIN OPTICS; GRAVITATIONAL EFFECTS; STELLAR RADIATION; STELLAR SPECTRA; ABSORPTION SPECTRA
Abstract :
[en] New data has been obtained for the quadruply lensed quasar H 1413 + 117 using the bidimensional spectrograph SILFID at the CFH telescope. The spectra recorded for each of the four individual images turn out to be quite similar, except for the narrow absorption line systems (probably related to the lenses) seen in images A and B and for marked differences in the spectrum of image D. When compared to the three other images, the spectrum of D shows smaller values for the emission lines/continuum ratio and a larger equivalent width for absorption features located in the blueshifted P Cygni profile. The possible explanations of these observations are briefly discussed in terms of micro-lensing and/or intrinsic variability of the source.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Angonin, M.-C.;  Paris, Observatoire, Meudon, France
Vanderriest, C.;  Paris, Observatoire, Meudon, France
Remy, M.
Surdej, Jean  ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Astroph. extragalactique et observations spatiales (AEOS)
Language :
English
Title :
First spectroscopic evidence of microlensing on a BAL quasar? The case of H 1413 + 117
Publication date :
July 1990
Journal title :
Astronomy and Astrophysics
ISSN :
0004-6361
eISSN :
1432-0746
Publisher :
EDP Sciences, Les Ulis, France
Volume :
233
Pages :
L5-L8
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 12 September 2009

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