J/ApJ/815/33 A Hubble diagram for quasars (Risaliti+, 2015)
A Hubble diagram for quasars.
Risaliti G., Lusso E.
<Astrophys. J., 815, 33 (2015)>
=2015ApJ...815...33R 2015ApJ...815...33R (SIMBAD/NED BibCode)
ADC_Keywords: QSOs ; X-ray sources ; Ultraviolet ; Redshifts
Keywords: cosmology: observations; distance scale
Abstract:
We present a new method to test the ΛCDM cosmological model and
to estimate cosmological parameters based on the nonlinear relation
between the ultraviolet and X-ray luminosities of quasars. We built a
data set of 1138 quasars by merging several samples from the
literature with X-ray measurements at 2keV and SDSS photometry, which
was used to estimate the extinction-corrected 2500Å flux. We
obtained three main results: (1) we checked the nonlinear relation
between X-ray and UV luminosities in small redshift bins up to z∼6,
confirming that the relation holds at all redshifts with the same
slope; (2) we built a Hubble diagram for quasars up to z∼6, which is
well matched to that of supernovae in the common z=0-1.4 redshift
interval and extends the test of the cosmological model up to z∼6; and
(3) we showed that this nonlinear relation is a powerful tool for
estimating cosmological parameters. Using the present data and
assuming a ΛCDM model, we obtain ΩM=0.22-0.08+0.10
and ΩΛ=0.92-0.30_+0.18 (Ω=0.28±0.04 and
ΩΛ=0.73±0.08 from a joint quasar-SNe fit). Much more
precise measurements will be achieved with future surveys. A few
thousand SDSS quasars already have serendipitous X-ray observations
from Chandra or XMM-Newton, and at least 100000 quasars with UV and
X-ray data will be made available by the extended ROentgen Survey with
an Imaging Telescope Array all-sky survey in a few years. The Euclid,
Large Synoptic Survey Telescope, and Advanced Telescope for High
ENergy Astrophysics surveys will further increase the sample size to
at least several hundred thousand. Our simulations show that these
samples will provide tight constraints on the cosmological parameters
and will allow us to test for possible deviations from the standard
model with higher precision than is possible today.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table2.dat 98 808 Optical and X-ray properties of the "best sample"
--------------------------------------------------------------------------------
See also:
VII/270 : SDSS quasar catalog: tenth data release (Paris+, 2014)
IX/42 : The XMM-Newton serendipitous ultraviolet source survey catalogue
J/ApJ/806/129 : Space telescope RM project. II. Swift data (Edelson+, 2015)
J/A+A/568/A22 : Joint analysis of the SDSS-II and SNLS SNe Ia (Betoule+, 2014)
J/MNRAS/438/1288 : SEDs of type I AGN in XMM-COSMOS. II. (Hao+, 2014)
J/ApJS/206/4 : SED of luminous QSOs (Krawczyk+, 2013)
J/ApJS/201/10 : SDSS quasar catalog with Swift observations (Wu+, 2012)
J/ApJ/751/52 : AGN candidates from WISE, 2MASS, RASS (W2R) (Edelson+, 2012)
J/ApJ/746/85 : The HST Cluster Supernova Survey. V. (Suzuki+, 2012)
J/ApJ/742/61 : Photom. redshift of AGNs from XMM- & C-COSMOS (Salvato+ 2011)
J/A+A/535/A80 : Type-2 QSOs in XMM-COSMOS (Mainieri+, 2011)
J/ApJS/194/45 : QSO properties from SDSS-DR7 (Shen+, 2011)
J/A+A/519/A17 : X-ray/UV ratio of 2XMM AGN (Vagnetti+, 2010)
J/ApJ/716/348 : The XMM-Newton survey of the COSMOS field (Brusa+, 2010)
J/ApJS/187/64 : The simultaneous optical-to-X-ray SED of AGNs (Grupe+, 2010)
J/A+A/512/A34 : XMM-COSMOS Type 1 AGNs (Lusso+, 2010)
J/A+A/497/635 : XMM-Newton wide-field survey in COSMOS (Cappelluti+, 2009)
J/ApJ/692/758 : BAL QSOs in SDSS-DR5 (Gibson+, 2009)
J/ApJ/685/773 : X-ray-UV relations in SDSS DR5 QSOs (Gibson+, 2008)
J/ApJS/166/470 : SDSS-Spitzer type I QSOs IR photometry (Richards+, 2006)
J/AJ/130/387 : SDSS-ROSAT AGN data (Strateva+, 2005)
J/ApJ/450/51 : X-rays from large optical QSO sample (Green+ 1995)
J/ApJS/95/1 : Atlas of Quasar Energy Distributions (Elvis+ 1994)
http://www.sdss.org/ : SDSS home page
Byte-by-byte Description of file: table2.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 19 A19 --- Name Source identifier
21- 29 F9.5 deg RAdeg Right Ascension in decimal degrees (J2000)
31- 39 F9.5 deg DEdeg Declination in decimal degrees (J2000)
41- 45 F5.3 --- z [0.06/6.3] Spectroscopic redshift
47- 53 F7.4 [10-7W/Hz] logLUV [28.9/33] Log UV monochromatic luminosity (1)
55- 61 F7.4 [10-7W/Hz] logLX [25/28.1] Log X-ray monochromatic
luminosity (2)
63- 70 F8.4 [mW/m2/Hz] logFUV [-29.3/-24.8] Log rest frame UV flux (1)
72- 78 F7.5 [mW/m2/Hz] e_logFUV [0/0.3] Uncertainty in logFUV
80- 87 F8.4 [mW/m2/Hz] logFX [-33.3/-28.8] Log rest frame X-ray flux (2)
89- 95 F7.5 [mW/m2/Hz] e_logFX [0/0.3] Uncertainty in logFX
97- 98 I2 --- Grp Group code (3)
--------------------------------------------------------------------------------
Note (1): At 2500 Angstroms. Extinction corrected. Units are erg/s/Hz and
erg/s/cm2/Hz for the luminosities and fluxes, respectively.
Note (2): At 2 keV. Extinction corrected. Units are erg/s/Hz and
erg/s/cm2/Hz for the luminosities and fluxes, respectively.
Note (3): Group code as follows:
1 = Steffen et al. (2006AJ....131.2826S 2006AJ....131.2826S); 222 quasars with z∼0.061-6.280
2 = Just et al. (2007ApJ...665.1004J 2007ApJ...665.1004J); 20 quasars with z∼1.760-4.610
3 = Shemmer et al. (2006ApJ...644...86S 2006ApJ...644...86S); 14 quasars with z∼4.720-6.220
4 = XMM-COSMOS (327 quasars with z∼0.45-4.255 from Lusso et al. 2010,
J/A+A/512/A34)
5 = Young et al. (2010ApJ...708.1388Y 2010ApJ...708.1388Y); 225 quasars with z∼0.173-4.441.
--------------------------------------------------------------------------------
History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 04-Mar-2016