J/MNRAS/423/600 Type-1 low-z AGN emission properties (Stern+, 2012)
Type 1 AGN at low z. I. Emission properties.
Stern J., Laor A.
<Mon. Not. R. Astron. Soc. 423, 600 (2012)>
=2012MNRAS.423..600S 2012MNRAS.423..600S
ADC_Keywords: Active gal. nuclei ; QSOs
Keywords: quasars: emission lines - quasars: general
Abstract:
We analyze the emission properties of a new sample of 3,579 type 1
AGN, selected from the SDSS DR7 based on the detection of broad
H-α emission. The sample extends over a broad H-α
luminosity LbHa of 1040-1044erg/s and a broad H-α FWHM
of 1,000-25,000km/s, which covers the range of black hole mass
106<MBH/M☉<109.5 and luminosity in Eddington units
10-3<L/LEdd<1. We combine ROSAT, GALEX and 2MASS observations to
form the SED from 2.2um to 2keV.
We find the following: 1. The distribution of the H-α FWHM values
is independent of luminosity. 2. The observed mean optical-UV SED is
well matched by a fixed shape SED of luminous quasars, which scales
linearly with LbHa, and a host galaxy contribution. 3. The host
galaxy r-band (fibre) luminosity function follows well the luminosity
function of inactive non-emission line galaxies (NEG), consistent with
a fixed fraction of ∼3% of NEG hosting an AGN, regardless of the host
luminosity. 4. The hosts of lower luminosity AGN have a mean z band
luminosity and u-z colour which are identical to NEG with the same
redshift distribution. With increasing LbHa the AGN hosts become
bluer and less luminous than NEG. The implied increasing star
formation rate with LbHa is consistent with the relation for SDSS
type 2 AGN of similar bolometric luminosity. 5. The optical-UV SED of
the more luminous AGN shows a small dispersion, consistent with dust
reddening of a blue SED, as expected for thermal thin accretion disc
emission. 6. There is a rather tight relation of νLν(2keV) and
LbHa, which provides a useful probe for unobscured (true) type 2
AGN. 7. The primary parameter which drives the X-ray to UV emission
ratio is the luminosity, rather than MBH or L/LEdd.
Description:
Table 1: The type 1 AGN sample, selected from the SDSS DR7 based on
the detection of broad H-α emission. The table includes broad
H-α luminosities, widths and 2MASS, GALEX and ROSAT photometric
luminosities.
Table B1: Objects with excess flux near H-α that were rejected
from the type 1 sample. The table lists the excess flux and reason for
rejection.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 73 3579 Type 1 AGN sample
tableb1.dat 95 3407 Excess flux objects rejected from sample
--------------------------------------------------------------------------------
See also:
J/A+A/274/105 : UV to X bump of Seyfert 1 AGNs (Walter+ 1993)
J/A+A/457/79 : VIMOS VLT Deep Survey faint type-1 AGN sample (Gavignaud+ 2006)
J/A+A/512/A34 : XMM-COSMOS Type 1 AGNs (Lusso+, 2010)
J/ApJ/590/73 : RASS AGN sample. II. (Xu+, 2003)
http://www.sdss/org : SDSS Home Page
Byte-by-byte Description of file: table1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 19 A19 --- Name SDSS name (JHHMMSS.ss+DDMMSS.s)
21- 25 F5.3 --- z Redshift (from SDSS)
27- 31 F5.2 [10-7W] logLbHa Broad H-α luminosity
33- 37 I5 km/s W(bHa) Broad H-α FWHM
39- 43 F5.2 [10-7W] logLKs ? Ks luminosity (2MASS) (1)
45- 49 F5.2 [10-7W] logLH ? H luminosity (2MASS) (1)
51- 55 F5.2 [10-7W] logLJ ? J luminosity (2MASS) (1)
57- 61 F5.2 [10-7W] logLNUV ? NUV luminosity (GALEX) (1)
62 A1 --- n_logLNUV [n] n for object not observed
63- 67 F5.2 [10-7W] logLFUV ? FUV luminosity (GALEX) (1)
68 A1 --- n_logLFUV [n] n for object not observed
69- 73 F5.2 [10-7W] logLX ? 2keV luminosity (ROSAT) (1)
--------------------------------------------------------------------------------
Note (1): GALEX and 2MASS luminosities are in observed frame.
Non detections are denoted by blanks.
For 2MASS and GALEX, a detection in all bands of the survey is required.
--------------------------------------------------------------------------------
Byte-by-byte Description of file: tableb1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 19 A19 --- Name SDSS name (JHHMMSS.ss+DDMMSS.s)
21- 24 F4.1 --- Excess Normalized excess flux (ΔF/σdata)
26- 95 A70 --- Reason Criterion that object failed
--------------------------------------------------------------------------------
Acknowledgements:
Jonathan Stern, stern(at)physics.technion.ac.il
(End) Jonathan Stern [IIT], Patricia Vannier [CDS] 15-Mar-2012