We discuss the imprints left by a cosmological evolution of the star formation rate (SFR) on the evolution of X-ray luminosities LX of normal galaxies, using the scheme proposed by White and Ghosh (1998, WG98), wherein the evolution of LX of a galaxy is driven by the evolution of its X-ray binary population. As indicated in WG98, the profile of LX with redshift can both serve as a diagnostic pr...

In this study we investigate the relation between stellar mass, dust extinction and star formation rate (SFR) using ∼ 150, 000 star-forming galaxies from the SDSS DR7. We show that the relation between dust extinction and SFR changes with stellar mass. For galaxies at the same stellar mass dust extinction is anti-correlated with the SFR at stellar masses < 10M⊙. There is a sharp transition in t...

This work revisits the star formation rate (SFR) model of Krumholz and McKee, extends it to the case of a magnetized medium, and verifies it with a set of numerical simulations of driven, supersonic, magneto-hydrodynamic (MHD) turbulence, where collapsing cores are captured with accreting sink particles. The main results are: i) a new physical interpretation of the critical density for star for...

Critical examination of the slanted-edge method for color SFR measurement reveals inaccuracies in the estimated SFR, due to the use of demosaicing. The proposed method resolves these inaccuracies by eliminating the need for demosaicing during SFR measurement. OCIS codes: (110.4100) Modulation transfer function; (110.4850) Optical transfer functions

About 45% of the point sources detected in the 2 Ms Chandra exposure of the HDF-N can be matched with moderately bright galaxies with z < 1.4 that have been studied by the Caltech Faint Galaxy Redshift Survey. Although the optical spectra of these galaxies appear normal, based on their X-ray properties ∼20% of them appear to contain weak AGNs. More than 90% of the X-ray photons detected by Chan...

We derive a physical model for the observed relations between star formation rate (SFR) and molecular line (CO and HCN) emission in galaxies, and show how these observed relations are reflective of the underlying star formation law. We do this by combining self-consistent 3D non-LTE radiative transfer calculations with hydrodynamic simulations of isolated disk galaxies and galaxy mergers. We de...

Using deep Herschel and ALMA observations, we investigate the star formation rate (SFR) distributions of X-ray selected AGN host galaxies at 0.5 < z < 1.5 and 1.5 < z < 4, comparing them to that of normal, star-forming (i.e., “main-sequence”, or MS) galaxies. We find 34–55 per cent of AGNs in our sample have SFRs at least a factor of two below that of the average MS galaxy, compared to ≈ 15 per...

The main observational results from radio continuum and polarization observations about the magnetic field strength and large-scale pattern for face-on and edge-on spiral galaxies are summarized and compared within our sample of galaxies of different morphological types, inclinations, and star formation rates (SFR). We found that galaxies with low SFR have higher thermal fractions/ smaller sync...

We use the photometric information contained in individual pixels of 44,964 (0.019 < z < 0.125 and −23.5 < Mr < −20.5) galaxies in the Fourth Data Release (DR4) of the Sloan Digital Sky Survey to investigate the effects of environment on galaxy star formation (SF). We use the pixel-z technique, which combines stellar population synthesis models with photometric redshift template fitting on the ...

INTRODUCTION Since 2011 the Swedish Fracture Register (SFR) has collected information on fracture epidemiology, treatment and outcome. More than 112 000 fractures, including 11 600 ankle fractures, have been registered so far. The accuracy of the classification is crucial when using the register in future research and quality improvement of care. In this study we examine the degree of accuracy ...