2015A&A...574A..46P


Query : 2015A&A...574A..46P

2015A&A...574A..46P - Astronomy and Astrophysics, volume 574A, 46-46 (2015/2-1)

Exploration of quasars with the Gaia mission.

PROFT S. and WAMBSGANSS J.

Abstract (from CDS):

We analyze the opportunities in and limits to investigating quasars with the Gaia satellite by studying Gaia's low- and high-resolution quasar spectra, with consideration of their signal-to-noise ratios. Furthermore, we explore bright quasars from the Sloan Digital Sky Survey with broad emission lines (BELs) redshifted into the spectral range of Gaia's Radial Velocity Spectrograph (RVS). We find that Gaia low-resolution spectra of quasars enable a determination of equivalent widths, continuum variability, and the Baldwin effect. Additionally, it will be feasible to analyze BEL reverberation mapping with Gaia data for a small sample of objects. These quasars should have a high cadence of measurements or higher time lags due to large redshifts, high quasar luminosities, or selected low-ionization lines. More than 500 known quasars will also get high-resolution spectra of individual BELs in the small wavelength range of the RVS. This allows an investigation of broad emission line shapes and their variabilities to get information on the spatial structure and kinematics of the broad line region. We identify six known variable SDSS quasars with BELs in the RVS that have interesting spectra for a potential intrinsic line variability investigation. However, the signal-to-noise ratio of the RVS is too small for studying narrow and broad absorption lines in quasar spectra.

Abstract Copyright:

Journal keyword(s): quasars: general - space vehicles: instruments

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 LBQS 0004+0036 QSO 00 07 10.014 +00 53 29.07   17.58 17.25     ~ 55 0
2 [VV2006] J033706.2-004747 QSO 03 37 06.2305229825 -00 47 47.747774813   18.12 17.85     ~ 22 0
3 2SLAQ J133649.11-002057.4 Sy1 13 36 49.1063783904 -00 20 57.298756100   18.31 18.16     ~ 33 0
4 LBQS 1429-0053 QSO 14 32 29.2466918428 -01 06 16.091805697   18.10 17.88     ~ 95 0
5 [VV2006] J154757.7+060627 QSO 15 47 57.7189896621 +06 06 26.666815241   18.17 17.87     ~ 25 0
6 [VV2006] J155449.1+084204 QSO 15 54 49.1134071117 +08 42 04.840637280   17.82 17.56     ~ 26 0
7 1RXS J172321.6+550417 Sy1 17 23 22.3108258715 +55 04 13.824942741   19.81 19.25     ~ 8 0
8 QSO B2149-2745 QSO 21 52 07.4534 -27 31 49.718   18.70 18.39     ~ 98 2
9 QSO B2310+0018 QSO 23 13 24.4543585882 +00 34 44.582411841   17.05 16.59     ~ 40 0

    Equat.    Gal    SGal    Ecl

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2021.07.27-08:35:08

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