2003A&A...397..891J


C.D.S. - SIMBAD4 rel 1.7 - 2021.03.02CET11:56:42

2003A&A...397..891J - Astronomy and Astrophysics, volume 397, 891-898 (2003/1-3)

Caught in the act: A helium-reionizing quasar near the line of sight to Q0302-003.

JAKOBSEN P., JANSEN R.A., WAGNER S. and REIMERS D.

Abstract (from CDS):

We report the discovery of a quasar at z=3.050±0.003, closely coincident in redshift with the isolated low-opacity feature seen near z≃3.056 in the otherwise black portion of the HeII Gunn-Peterson absorption trough seen toward the z=3.286 background quasar Q0302-003, located 6.5' away on the sky. We explore plausible models for the HeIII ionization zone created by this neighboring quasar and its interception with the line of sight toward Q0302-003. At its present brightness of V≃20.5 and separation of D{perpendicular}≃3.2Mpc, the quasar can readily account for the opacity gap in the HeII absorption spectrum of Q0302-003, provided it has been active for tQ>107y. This is the first clear example of the ``transverse'' proximity effect and the association of a quasar with its imprint on the intervening absorption detected along an adjacent line of sight.

Abstract Copyright:

Journal keyword(s): quasars: individual: QSO03020-0014, Q0302-003 - quasars: absorption lines - intergalactic medium

Nomenclature: [JJW2003] QSO HHMMm+DDMM N=2.

Simbad objects: 9

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Number of rows : 9

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 3XMM J030435.4-000250 QSO 03 04 35.3330867752 -00 02 51.090501641   20.83 20.46 20.3   ~ 16 0
2 MCG+00-08-082 G 03 04 36.5647538241 -00 02 14.690088863   15.5       ~ 13 0
3 [VV2006] J030445.9-001138 QSO 03 04 45.9 -00 11 38     22.5     ~ 5 0
4 LBQS 0302-0019 QSO 03 04 49.8591748182 -00 08 13.537401746   18.08 17.80 17.5   ~ 239 0
5 GSC 04800-00963 * 06 52 11.5116004000 -00 19 16.356999275 14.612 13.287 11.930 11.203 10.549 ~ 21 0
6 HS 1700+6416 QSO 17 01 00.6195618802 +64 12 09.118927057   16.39 16.17     ~ 345 0
7 QSO B1935-692 QSO 19 40 25.5273425126 -69 07 56.972951491   18.36 18.8     ~ 107 1
8 [L92b] Mark A HS* 20 43 59.2255386146 -10 47 41.693629843 11.854 13.010 13.256 13.370 13.494 sdO 68 1
9 QSO B2347-4342 QSO 23 50 34.2595236845 -43 25 59.680334378   16.3 16.3     ~ 160 0

    Equat.    Gal    SGal    Ecl

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2021.03.02-11:56:42

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