2016A&A...587A..43S


Query : 2016A&A...587A..43S

2016A&A...587A..43S - Astronomy and Astrophysics, volume 587A, 43-43 (2016/3-1)

A multi-epoch spectroscopic study of the BAL quasar APM 08279+5255. II. Emission- and absorption-line variability time lags.

SATURNI F.G., TREVESE D., VAGNETTI F., PERNA M. and DADINA M.

Abstract (from CDS):

The study of high-redshift bright quasars is crucial to gather information about the history of galaxy assembly and evolution. Variability analyses can provide useful data on the physics of quasar processes and their relation with the host galaxy. In this study, we aim to measure the black hole mass of the bright lensed BAL QSO APM 08279+5255 at z=3.911 through reverberation mapping, and to update and extend the monitoring of its CIV absorption line variability. We perform the first reverberation mapping of the SiIV and CIV emission lines for a high-luminosity quasar at high redshift with the use of 138 R-band photometric data and 30 spectra available over 16 years of observations. We also cross-correlate the CIV absorption equivalent width variations with the continuum light curve to estimate the recombination time lags of the various absorbers and infer the physical conditions of the ionised gas. We find a reverberation-mapping time lag of ∼900 rest-frame days for both SiIV and CIV emission lines. This is consistent with an extension of the BLR size-to-luminosity relation for active galactic nuclei up to a luminosity of ∼1048erg/s, and implies a black hole mass of 1010M. Additionally, we measure a recombination time lag of ∼160 days in the rest frame for the CIV narrow absorption system, which implies an electron density of the absorbing gas of ∼2.5x104cm–3. The measured black hole mass of APM 08279+5255 indicates that the quasar resides in an under-massive host-galaxy bulge with Mbulge∼7.5MBH, and that the lens magnification is lower than ∼8. Finally, the inferred electron density of the narrow-line absorber implies a distance of the order of 10kpc of the absorbing gas from the quasar, placing it within the host galaxy.

Abstract Copyright:

Journal keyword(s): galaxies: active - quasars: absorption lines - quasars: emission lines - quasars: supermassive black holes - quasars: individual: APM 08279+5255 - quasars: general

CDS comments: CID-947 is XMMC 60131 in SIMBAD.

Simbad objects: 13

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Number of rows : 13
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
#notes
1 [VV2006] J052247.2-710130 QSO 05 22 47.1925789752 -71 01 30.816609420     19.44   18.57 ~ 13 0
2 QSO J0831+5245 QSO 08 31 41.7108197808 +52 45 17.616994560   19.2   14.5 13.9 ~ 527 1
3 4C 71.07 QSO 08 41 24.36528508 +70 53 42.1730435     16.5 16.8   ~ 740 1
4 COSMOS2015 558647 QSO 10 01 11.3378613816 +02 08 55.615115832   22.159 21.175   20.50 ~ 38 0
5 NGC 3783 Sy1 11 39 01.7096819040 -37 44 19.009642992   12.46 13.43 11.33 12.1 ~ 1586 0
6 NGC 4151 Sy1 12 10 32.5759813872 +39 24 21.063527532   12.18 11.48     ~ 3574 2
7 NGC 4395 Sy2 12 25 48.8633109888 +33 32 48.700168152 10.84 10.54 10.11 9.98   ~ 1109 1
8 LB 19 QSO 12 50 05.7146863848 +26 31 07.598352000   16.12 15.92     ~ 200 0
9 NGC 5548 Sy1 14 17 59.5400291832 +25 08 12.603122268   14.35 13.73     ~ 2589 0
10 ICRF J184208.9+794617 Sy1 18 42 08.9904975672 +79 46 17.127835104   16.06 15.38     ~ 1275 0
11 QSO J2240+0321 QSO 22 40 30.234 +03 21 30.63           ~ 667 1
12 Z 378-15 G 22 40 30.23447 +03 21 30.6290           ~ 629 0
13 NGC 7469 Sy1 23 03 15.674 +08 52 25.28 12.60 13.00 12.34     ~ 2027 3

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2023.01.31-08:30:29

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