Context. Star formation rate (SFR), metallicity, and stellar mass are
among the most important parameters of star-forming (SF) galaxies
characterizing their formation and evolution. They are known to be
related to each other both at low and high redshift in the
mass-metallicity, mass-SFR, and metallicity-SFR relations. <BR /> Aims:
We demonstrate the existence of a plane in a 3D parameter space defined
by the axes SFR [log (SFR)(M<SUB>ȯ</SUB> yr<SUP>-1</SUP>)] , gas
metallicity [12 + log (O/H)], and stellar mass…
We report the discovery of peculiar features in the optical spectrum of
4C+22.25, a flat spectrum radio quasar at z = 0.4183 observed in the
Sloan Digital Sky Survey and in a dedicated spectroscopic follow-up from
the Nordic Optical Telescope. The Hβ and Hα lines show broad
profiles (FWHM ~ 12,000 km s<SUP>-1</SUP>), faint fluxes, and extreme
offsets (Δv = 8700 ± 1300 km s<SUP>-1</SUP>) with respect
to the narrow emission lines. These features show no significant
variation in a time lag of ~3.1 yr (rest frame). We rule out possible
interpretations based on the…
Lyα emitters (LAEs) are seen everywhere in the redshift domain
from local to z ~ 7. Far-infrared (FIR) counterparts of LAEs at
different epochs could provide direct clues on dust content, extinction,
and spectral energy distribution (SED) for these galaxies. We search for FIR counterparts of LAEs that are optically detected in the GOODS-North
field at redshift z ~ 2.2 using data from the Herschel Space Telescope
with the Photodetector Array Camera and Spectrometer (PACS). The LAE
candidates were isolated via color-magnitude diagram using the
medium-band photometry from the ALHAMBRA Survey,…
