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Related papers: Lx-SFR relation in star forming galaxies

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We use $\sim 1,000$ X-ray sources in the COSMOS-Legacy survey and study the position of the AGN relative to the star forming main sequence (MS). We also construct a galaxy (non-AGN) reference sample that includes $\sim 90,000$ sources. We…

Astrophysics of Galaxies · Physics 2022-05-18 G. Mountrichas , V. A. Masoura , E. M. Xilouris , I. Georgantopoulos , V. Buat , E. -D. Paspaliaris

We investigate the H-alpha and infrared star formation rate (SFR) diagnostics for galaxies in the Nearby Field Galaxy Survey (NFGS). For the 81 galaxies in our sample, we derive H-alpha fluxes (included here) from integrated spectra. There…

Astrophysics · Physics 2008-11-26 L. J. Kewley , M. J. Geller , R. A. Jansen , M. A. Dopita

It has been proposed that the mass-metallicity relation of galaxies exhibits a secondary dependence on star formation rate (SFR), and that the resulting M-Z-SFR relation may be redshift-invariant, i.e., "fundamental." However, conflicting…

Astrophysics of Galaxies · Physics 2014-12-23 Samir Salim , Janice C. Lee , Chun Ly , Jarle Brinchmann , Romeel Davé , Mark Dickinson , John J. Salzer , Stéphane Charlot

We use the star formation rate-stellar mass relation ($SFR - {M_ * }$) of galaxies to measure their luminosity distances as well as estimate cosmological parameters. We compile a sample of 341 high-redshift galaxies at $5 < z < 14$ and an…

Cosmology and Nongalactic Astrophysics · Physics 2025-02-25 L. Huang , P. Zong , Z. X. Chang , N. Chang , F. He

The X-ray luminosity function (XLF) of galaxies is dominated by AGN (classified by their optical spectra) above Lx=10**42 erg/s, below this value by normal galaxies. The X-ray flux of AGN at low X-ray luminosity therefore contains…

Astrophysics · Physics 2007-05-23 I. Lehmann , G. Hasinger , A. D. Schwope , Th. Boller

This paper presents the spatially resolved star formation history (SFH) of nearby galaxies with the aim of furthering our understanding of the different processes involved in the formation and evolution of galaxies. To this end, we apply…

We aim to characterize the nature of galaxies whose optical emission line diagnostics are consistent with star formation, but whose X-ray properties strongly point towards the presence of an AGN. Understanding these sources is of particular…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-05 N. Castelló-Mor , X. Barcons , L. Ballo , F. J. Carrera , M. J. Ward , C. Jin

We investigate the relationship between the star formation rate (SFR) and dense molecular gas mass in the nuclei of galaxies. To do this, we utilize the observed 850 micron luminosity as a proxy for the infrared luminosity and SFR, and…

Astrophysics · Physics 2009-11-13 Desika Narayanan , Thomas J. Cox , Lars Hernquist

We obtain total galaxy X-ray luminosities, $L_X$, originating from individually detected point sources in a sample of 47 galaxies in 15 compact groups of galaxies (CGs). For the great majority of our galaxies, we find that the detected…

The aim of this paper is to characterize the radial structure of the star formation rate (SFR) in galaxies in the nearby Universe as represented by the CALIFA survey. The sample under study contains 416 galaxies observed with IFS, covering…

We present evidence for stochastic star formation histories in low-mass (M* < 10^10 Msun) galaxies from observations within the Galaxy And Mass Assembly (GAMA) survey. For ~73,000 galaxies between 0.05<z<0.32, we calculate star formation…

[Abridged] We compare H-alpha, ultraviolet (UV) and infrared (IR) indicators of star formation rate (SFR) for a sample of z = 0.84 galaxies from the High-z Emission Line Survey (HiZELS). Using multi-wavelength diagnostics, we estimate that…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-14 Timothy Garn , David Sobral , Philip N. Best , James E. Geach , Ian Smail , Michele Cirasuolo , Gavin B. Dalton , James S. Dunlop , Ross J. McLure , Duncan Farrah

We use a sample of 43,690 galaxies selected from the Sloan Digital Sky Survey Data Release 4 to study the systematic effects of specific star formation rate (SSFR) and galaxy size (as measured by the half light radius, r_h) on the…

Astrophysics · Physics 2009-11-13 Sara L. Ellison , David R. Patton , Luc Simard , Alan W. McConnachie

This paper discusses the evolution of the correlation between galaxy star formation rates (SFRs) and stellar mass (M*) over the last ~10 Gyrs, particularly focusing on its environmental dependence. We first present the mid-infrared (MIR)…

Lyman Break Galaxies (LBGs) are widely thought to be prototypical young galaxies in the early universe, particularly representative of those undergoing massive events of star formation. Therefore, LBGs should produce significant amounts of…

Cosmology and Nongalactic Astrophysics · Physics 2012-10-17 Peter-Christian Zinn , Stefan Blex , Nicholas Seymour , Dominik J. Bomans

Many investigations of star formation rates (SFRs) in galaxies have explored details of dust obscuration, with a number of recent analyses suggesting that obscuration appears to increase in systems with high rates of star formation. To date…

Astrophysics · Physics 2008-12-18 J. Afonso , A. Hopkins , B. Mobasher , C. Almeida

Context: We use the first XMM serendipitous source catalogue (1XMM) to compile a sample of normal X-ray galaxies Aims: We seek to expand the database of X-ray selected normal galaxies at intermediate redshifts and examine the relation…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-13 E. Rovilos , I. Georgantopoulos , P. Tzanavaris , M. Pracy , M. Whiting , D. Woods , C. Goudis

Near infrared slitless spectroscopy with the Wide Field Camera 3, onboard the Hubble Space Telescope, offers a unique opportunity to study low-mass galaxy populations at high-redshift ($z\sim$1-2). While most high$-z$ surveys are biased…

We examine what types of galaxies the conversion formula from dust infrared (IR) luminosity into the star formation rate (SFR) derived by Kennicutt (1998) is applicable to. The ratio of the observed IR luminosity, $L_{\rm IR}$, to the…

Astrophysics · Physics 2016-08-30 Akio K. Inoue

We study the global star formation law - the relation between the gas and star formation rate (SFR) in a sample of 130 local galaxies with infrared (IR) luminosities spanning over three orders of magnitude (10^9-10^12 Lsun), which includes…

Cosmology and Nongalactic Astrophysics · Physics 2015-03-19 Lijie Liu , Yu Gao