2014A&A...570A..53M


C.D.S. - SIMBAD4 rel 1.7 - 2019.11.12CET15:48:13

2014A&A...570A..53M - Astronomy and Astrophysics, volume 570A, 53-53 (2014/10-1)

SALT long-slit spectroscopy of CTS C30.10: two-component Mg II line.

MODZELEWSKA J., CZERNY B., HRYNIEWICZ K., BILICKI M., KRUPA M., SWIETON A., PYCH W., UDALSKI A., ADHIKARI T.P. and PETROGALLI F.

Abstract (from CDS):

Quasars can be used as a complementary tool to SN Ia to probe the distribution of dark energy in the Universe by measuring the time delay of the emission line with respect to the continuum. The understanding of the MgII emission line structure is important for cosmological application and for the black hole mass measurements of intermediate redshift quasars. Knowing the shape of MgII line and its variability allows for identifying which part of the line should be used to measure the time delay and the black hole mass. We thus aim at determining the structure and the variability of the MgII line, as well as the underlying FeII pseudo-continuum. We performed five spectroscopic observations of a quasar CTS C30.10 (z=0.9000) with the SALT telescope between December 2012 and March 2014, and we studied the variations in the spectral shape in the 2700Å-2900Å rest frame. We show that the MgII line in this source consists of two kinematic components, which makes the source representative of type B quasars. Both components were modeled well with a Lorentzian shape, and they vary in a similar way. The FeII contribution seems to be related only to the first (blue) MgII component. Broad band spectral fitting instead favor the use of the whole line profile. The contribution of the narrow line region to MgII is very low, below 2%. The MgII variability is lower than the variability of the continuum, which is consistent with the simple reprocessing scenario. The variability level of CTS C30.10 and the measurement accuracy of the line and continuum is high enough to expect that further monitoring will allow the time delay between the MgII line and continuum to be measured.

Abstract Copyright:

Journal keyword(s): accretion, accretion disks - techniques: spectroscopic - line: profiles - quasars: individual: CTS C30.10 - dark energy - galaxies: active

VizieR on-line data: <Available at CDS (J/A+A/570/A53): spectra.dat>

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 - 2020
#notes
1 Mrk 1502 Sy1 00 53 34.9326560879 +12 41 35.927159668   14.41 14.03     ~ 1008 1
2 CD-28 595 PM* 01 54 50.2704861570 -27 28 35.740415025   12.06 11.51     ~ 115 0
3 QSO B0445-4542 QSO 04 47 19.9876481005 -45 37 38.348968296   17.2 17.2     ~ 12 0
4 [VV2006] J094534.0+100950 QSO 09 45 33.9894170119 +10 09 50.096932872   18.51 18.16     ~ 44 0
5 NGC 4151 Sy1 12 10 32.5771747733 +39 24 21.057727323   12.18 11.48     ~ 3308 2
6 3C 279 QSO 12 56 11.1664521013 -05 47 21.531840471   18.01 17.75 15.87   ~ 2635 2
7 NGC 5548 Sy1 14 17 59.5401093128 +25 08 12.600227883   14.35 13.73     ~ 2336 0
8 ICRF J184208.9+794617 Sy1 18 42 08.9910523393 +79 46 17.129210139   16.06 15.38     ~ 1188 0
9 LBQS 2113-4538 QSO 21 16 44.3147551838 -45 26 10.223233009     17.3     ~ 15 0

    Equat.    Gal    SGal    Ecl

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2019.11.12-15:48:13

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