Recurrence of the blue wing enhancements in the high ionization lines of SDSS 1004+4112 A - INSPIRE

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Recurrence of the blue wing enhancements in the high ionization lines of SDSS 1004+4112 A

Pedro Gomez-Alvarez
(
- Laguna U., Tenerife and
- Valencia U. and
- Baltimore, Space Telescope Sci. and
- IAA, Granada and
- Potsdam, Astrophys. Inst. and
- Calar Alto Observ. and
- CSIC, Catalunya
)
,
E. Mediavilla
(
- Laguna U., Tenerife and
- Valencia U. and
- Baltimore, Space Telescope Sci. and
- IAA, Granada and
- Potsdam, Astrophys. Inst. and
- Calar Alto Observ. and
- CSIC, Catalunya
)
,
J.A. Munoz
(
- Laguna U., Tenerife and
- Valencia U. and
- Baltimore, Space Telescope Sci. and
- IAA, Granada and
- Potsdam, Astrophys. Inst. and
- Calar Alto Observ. and
- CSIC, Catalunya
)
,
S. Arribas
(
- Laguna U., Tenerife and
- Valencia U. and
- Baltimore, Space Telescope Sci. and
- IAA, Granada and
- Potsdam, Astrophys. Inst. and
- Calar Alto Observ. and
- CSIC, Catalunya
)
,
S.F. Sanchez
(
- Laguna U., Tenerife and
- Valencia U. and
- Baltimore, Space Telescope Sci. and
- IAA, Granada and
- Potsdam, Astrophys. Inst. and
- Calar Alto Observ. and
- CSIC, Catalunya
)

May, 2006

4 pages

Published in:

Astrophys.J.Lett. 645 (2006) L5-L8

e-Print:

astro-ph/0605522 [astro-ph]

DOI:

10.1086/506147

View in:

ADS Abstract Service

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Abstract: (arXiv)

We present integral field spectroscopic observations of the quadruple-lensed QSO SDSS 1004+4112 taken with the fiber system INTEGRAL at the William Herschel Telescope on 2004 January 19. In May 2003 a blueward enhancement in the high ionization lines of SDSS 1004+4112A was detected and then faded. Our observations are the first to note a second event of similar characteristics less than one year after. Although initially attributed to microlensing, the resemblance among the spectra of both events and the absence of microlensing-induced changes in the continuum of component A are puzzling. The lack of a convincing explanation under the microlensing or intrinsic variability hypotheses makes the observed enhancements particularly relevant, calling for close monitoring of this object.

gravitational lensing
quasars: emission lines
quasars: individual (SDSS 1004+4112)

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