Results 91 to 100 of about 224,275 (141)
The Astrophysical JournalGamma-ray bursts (GRBs) are powerful probes of the high-redshift Universe. However, the proportion of collapsar GRBs among long GRBs and their event rate relative to the star formation rate (SFR) remain contentious issues. We assume that long GRBs with z
Yan-Kun Qu +3 more
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Luminosity function of faint Galactic sources in the Chandra bulge field
, 2011 We study the statistical properties of faint X-ray sources detected in the Chandra Bulge Field. The unprecedented sensitivity of the Chandra observations allows us to probe the population of faint Galactic X-ray sources down to luminosities L(2-10 keV ...
Cappelluti +37 more
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The Redshift Evolution of the Luminosity Function of Type II Gamma-Ray Bursts
The Astrophysical JournalAs of 2023 December, the Neil Gehrels Swift Observatory satellite has detected more than 1600 gamma-ray bursts (GRBs). We select 307 Type II GRBs for constructing the luminosity function (LF) based on the following criteria: (1) duration T _90 ≥ 2 s; (2)
Yan-Kun Qu +5 more
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A Nuclear Luminosity Function for Seyferts [PDF]
Symposium - International Astronomical Union, 1996 Relations between various classes of AGN should show up when examining their LFs. For Seyfert galaxies, such studies have been affected by the prevalence of (essentially) integrated magnitudes. Proper nuclear magnitudes have been determined in an effort of CCD imaging, which enable an appropriate comparison with QSOs.
openaire +2 more sources
The CNOC2 Field Galaxy Luminosity Function. I. A Description of Luminosity Function Evolution
The Astrophysical Journal, 1999 We examine the evolution of the galaxy luminosity function (LF) using a sample of over 2000 galaxies, with 0.12 < z < 0.55 and 17.0 < Rc < 21.5, drawn from the Canadian Network for Observational Cosmology Field Galaxy Redshift Survey (CNOC2), at present the largest such sample at intermediate redshifts. We use UBVRcIc photometry to classify
Howard K. C. Yee +15 more
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Mass and Luminosity Function of the Pleiades [PDF]
Symposium - International Astronomical Union, 1980 From a proper motion survey by Pels and photometric measurement of selected stars it was found that the Pleiades cluster extends till at least 496 from the centre, corresponding to 10 pc at a distance of 125 pc. It turns out that the luminosity function of the Pleiades is a function of the distance to the centre, the proportion of faint stars ...
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A NEW LUMINOSITY FUNCTION FOR GALAXIES AS GIVEN BY THE MASS-LUMINOSITY RELATIONSHIP [PDF]
The Astronomical Journal, 2008 The search for a luminosity function for galaxies both alternative or companion to a Schechter function is a key problem in the reduction of data from catalogs of galaxies. Two luminosity functions for galaxies can be built starting from two distributions of mass as given by the fragmentation. A first overall distribution function is the Kiang function
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Scientific ReportsWe characterize luminosity components of Ultra/Luminous Infrared Galaxies (U/LIRGs) in multi-wavelength from the X-ray to far-infrared. A set of 63 AGN U/LIRGs was selected where these galaxies are powered by a central active galactic nucleus (AGN ...
Abdallah A. M. Ali +3 more
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The High-mass X-Ray Binary Luminosity Functions of Dwarf Galaxies
The Astrophysical JournalDrawing from the Chandra archive and using a carefully selected set of nearby dwarf galaxies, we present a calibrated high-mass X-ray binary (HMXB) luminosity function in the low-mass galaxy regime and search for an already hinted at dependence on ...
Robel Geda +4 more
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The Astrophysical Journal LettersWe present a sample of 88 candidate z ∼ 8.5–14.5 galaxies selected from the completed NIRCam imaging from the Cosmic Evolution Early Release Science survey.
Steven L. Finkelstein +54 more
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