Bibcode
Symeonidis, M.; Georgakakis, A.; Seymour, N.; Auld, R.; Bock, J.; Brisbin, D.; Buat, V.; Burgarella, D.; Chanial, P.; Clements, D. L.; Cooray, A.; Eales, S.; Farrah, D.; Franceschini, A.; Glenn, J.; Griffin, M.; Hatziminaoglou, E.; Ibar, E.; Ivison, R. J.; Mortier, A. M. J.; Oliver, S. J.; Page, M. J.; Papageorgiou, A.; Pearson, C. P.; Pérez-Fournon, I.; Pohlen, M.; Rawlings, J. I.; Raymond, G.; Rodighiero, G.; Roseboom, I. G.; Rowan-Robinson, M.; Scott, Douglas; Smith, A. J.; Tugwell, K. E.; Vaccari, M.; Vieira, J. D.; Vigroux, L.; Wang, L.; Wright, G.
Bibliographical reference
Monthly Notices of the Royal Astronomical Society, Volume 417, Issue 3, pp. 2239-2252.
Advertised on:
11
2011
Citations
45
Refereed citations
41
Description
For the first time, we investigate the X-ray/infrared (IR) correlation
for star-forming galaxies (SFGs) at z˜ 1, using SPIRE submm data
from the recently launched Herschel Space Observatory and deep X-ray
data from the 2-Ms Chandra Deep Field-North survey. We examine the
X-ray/IR correlation in the soft X-ray (SX; 0.5-2 keV) and hard X-ray
(HX; 2-10 keV) bands by comparing our z˜ 1 SPIRE-detected SFGs to
equivalently IR-luminous (LIR > 1010
L&sun;) samples in the local/low-redshift Universe. Our
results suggest that the X-ray/IR properties of the SPIRE SFGs are on
average similar to those of their local counterparts, as we find no
evidence for evolution in the LSX/LIR and
LHX/LIR ratios with redshift. We note, however,
that at all redshifts, both LSX/LIR and
LHX/LIR are strongly dependent on IR luminosity,
with luminous and ultraluminous IR galaxies (LIRGs and ULIRGs;
LIR > 1011 L&sun;) having up to an
order of magnitude lower values than normal IR galaxies (LIR
< 1011 L&sun;). We derive a
LSX-LIR relation and confirm the applicability of
an existing LHX-LIR relation for both local and
distant LIRGs and ULIRGs, consistent with a scenario where X-ray
luminosity is correlated with the star formation rate.
Related projects
Formation and Evolution of Galaxies: Observations in Infrared and other Wavelengths
This IAC research group carries out several extragalactic projects in different spectral ranges, using space as well as ground-based telescopes, to study the cosmological evolution of galaxies and the origin of nuclear activity in active galaxies. The group is a member of the international consortium which built the SPIRE instrument for the
Ismael
Pérez Fournon