- ID:
- ivo://lca/lyman
- Title:
- Catalog of Lyman{alpha} Forest Simulations
- Short Name:
- LCA Lyman Alpha
- Date:
- 22 Jul 2006 01:41:20
- Publisher:
- University of California, San Diego
- Description:
- 40 fully hydrodynamical numerical simulations of the intergalactic gas that gives rise to the Ly-alpha forest. The available data includes simulated spectra, fields such as temperature and density, and parameter files for the simulation. Links are provided to the simulation software (Enzo). This data is made available as a web supplement to astro-ph/0412557, "A Concordance Model of the Lyman- Alpha Forest at z =1.95".
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- ID:
- ivo://CDS.VizieR/J/other/AstBu/64.276
- Title:
- Catalog of radio galaxies with z>0.3
- Short Name:
- VII/255
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- This catalog groups the 2442 galaxies making up the sample of distant galaxies prepared by the authors published as 3 papers in 2009: radio data (paper I, table1), photometric data (paper II, table2), and angular sizes (paper III, table 3). The sample of distant (z>0.3) radio galaxies is aimed at application in cosmological tests. It was created using NED, SDSS, and CATS databases, and is assumed to be cleaned from objects with quasar properties.
- ID:
- ivo://CDS.VizieR/J/other/AstBu/64.123
- Title:
- Catalog of radio galaxies with z>0.3
- Short Name:
- VII/255
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- This catalog groups the 2442 galaxies making up the sample of distant galaxies prepared by the authors published as 3 papers in 2009: radio data (paper I, table1), photometric data (paper II, table2), and angular sizes (paper III, table 3). The sample of distant (z>0.3) radio galaxies is aimed at application in cosmological tests. It was created using NED, SDSS, and CATS databases, and is assumed to be cleaned from objects with quasar properties.
- ID:
- ivo://CDS.VizieR/J/ApJ/901/159
- Title:
- MaNGA AGNs from WISE, Swift/BAT, NVSS & FIRST
- Short Name:
- J/ApJ/901/159
- Date:
- 21 Feb 2022 13:46:21
- Publisher:
- CDS
- Description:
- Accurate active galactic nucleus (AGN) identifications and spatially resolved host galaxy properties are a powerful combination for studies of the role of AGNs and AGN feedback in the coevolution of galaxies and their central supermassive black holes. Here, we present robust identifications of 406 AGNs in the first 6261 galaxies observed by the integral field spectroscopy survey Mapping Nearby Galaxies at Apache Point Observatory (MaNGA). Instead of using optical line flux ratios, which can be difficult to interpret in light of the effects of shocks and metallicity, we identify the AGNs via mid-infrared Wide-field Infrared Survey Explorer colors, Swift/BAT ultrahard X-ray detections, NVSS and FIRST radio observations, and broad emission lines in SDSS spectra. We subdivide the AGNs into radio-quiet and radio-mode AGNs, and examine the correlations of the AGN classes with host galaxy star formation rates and stellar populations. When compared to the radio-quiet AGN host galaxies, we find that the radio-mode AGN host galaxies are preferentially elliptical, lie further beneath the star-forming main sequence (with lower star formation rates at fixed galaxy mass), have older stellar populations, and have more negative stellar age gradients with galactocentric distance (indicating inside-out quenching of star formation). These results establish a connection between radio-mode AGNs and the suppression of star formation.
- ID:
- ivo://CDS.VizieR/J/other/Nat/515.376
- Title:
- Power of relativistic jets in blazars
- Short Name:
- J/other/Nat/515.
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- Theoretical models for the production of relativistic jets from active galactic nuclei predict that jet power arises from the spin and mass of the central supermassive black hole, as well as from the magnetic field near the event horizon. The physical mechanism underlying the contribution from the magnetic field is the torque exerted on the rotating black hole by the field amplified by the accreting material. If the squared magnetic field is proportional to the accretion rate, then there will be a correlation between jet power and accretion luminosity. There is evidence for such a correlation, but inadequate knowledge of the accretion luminosity of the limited and inhomogeneous samples used prevented a firm conclusion. Here we report an analysis of archival observations of a sample of blazars (quasars whose jets point towards Earth) that overcomes previous limitations. We find a clear correlation between jet power, as measured through the γ-ray luminosity, and accretion luminosity, as measured by the broad emission lines, with the jet power dominating the disk luminosity, in agreement with numerical simulations9. This implies that the magnetic field threading the black hole horizon reaches the maximum value sustainable by the accreting matter.
- ID:
- ivo://CDS.VizieR/J/ApJ/702/506
- Title:
- The Clowes-Campusano LQG Survey. I.
- Short Name:
- J/ApJ/702/506
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- The nature of galaxy structures on large scales is a key observational prediction for current models of galaxy formation. The Sloan Digital Sky Survey (SDSS) and the 2dF galaxy survey have revealed a number of structures on 40-150h<SUP>–1</SUP>Mpc scales at low redshifts, and some even larger ones. To constrain galaxy number densities, luminosities, and stellar populations in large structures at higher redshift, we have investigated two sheet-like structures of galaxies at z=0.8 and 1.3 spanning 150h<SUP>–1</SUP> comoving Mpc embedded in large quasar groups (LQGs) extending over at least 200h<SUP>–1</SUP>Mpc. We present first results of an analysis of these sheet-like structures using two contiguous 1° Galaxy Evolution Explorer (GALEX) fields (FUV and NUV) cross-correlated with optical data from the SDSS. We derive a sample of 462 Lyman break galaxy (LBG) candidates coincident with the sheets. Using the GALEX and SDSS data, we show that the overall average spectral energy distribution of a LBG galaxy at z∼1 is flat (in f<SUB>λ</SUB>) in the rest-frame wavelength range from 1500Å to 4000Å, implying evolved populations of stars in the LBGs. From the luminosity functions we get indications for overdensities in the two LQGs compared to their foreground regions.
