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5101. The Ogle et al. Galaxy Catalog (OGC)
ID:
ivo://CDS.VizieR/J/ApJS/243/14
Title:
The Ogle et al. Galaxy Catalog (OGC)
Short Name:
J/ApJS/243/14
Date:
21 Oct 2021
Publisher:
CDS
Description:
We present a catalog of the 1525 most optically luminous galaxies from the Sloan Digital Sky Survey with r-band luminosity L_r_>8L* and redshift z<0.3, including 84 super spirals, 15 super lenticulars, 14 super post-merger galaxies, and 1400 giant ellipticals. With mass in stars of 10^11.3^-10^12^M_{sun}_, super spirals and lenticulars are the most massive disk galaxies currently known. The specific star formation rates of super spirals place them on or below the star-forming main sequence. They must have formed stars at a high rate throughout their history in order to grow their massive, gigantic stellar disks and maintain their blue u-r integrated colors. Their disks are red on the inside and blue on the outside, consistent with inside-out growth. They tend to have small bulge-to-total (B/T) r-band luminosity ratios, characteristic of disk building via minor mergers and cold accretion. A large percentage of super disk galaxies (41%) have double nuclei, double disks, or other signatures of ongoing mergers. Most (72%) are found in moderate- to low-density environments, while the rest are found at the outskirts of clusters. It is likely that super spirals survive in these environments because they continue to accrete cold gas and experience only minor mergers at late times, by virtue of their enormous masses and angular momenta. We suggest that super post-mergers are the product of super spiral major mergers and may be the precursors of some giant elliptical galaxies found in low-density environments.
5102. The OPTX project: CLANS, CLASXS and CDF-N
ID:
ivo://CDS.VizieR/J/ApJS/179/1
Title:
The OPTX project: CLANS, CLASXS and CDF-N
Short Name:
J/ApJS/179/1
Date:
21 Oct 2021
Publisher:
CDS
Description:
We present the redshift catalogs for the X-ray sources detected in the Chandra Deep Field-North (CDF-N), the Chandra Large Area Synoptic X-ray Survey (CLASXS), and the Chandra Lockman Area North Survey (CLANS). The catalogs for the CDF-N and CLASXS fields include redshifts from previous work, while the redshifts for the CLANS field are all new. For fluxes above 10^-14^ergs/cm^2^/s (2-8keV) we have redshifts for 76% of the sources. We extend the redshift information for the full sample using photometric redshifts. The goal of the OPTX Project is to use these three surveys, which are among the most spectroscopically complete surveys to date, to analyze the effect of spectral type on the shape and evolution of the X-ray luminosity functions and to compare the optical spectral types with the X-ray spectral properties. We also present the CLANS X-ray catalog. The nine ACIS-I fields cover a solid angle of ~0.6deg^2^ and reach fluxes of 7x10^-16^ergs/cm^2^/s (0.5-2keV) and 3.5x10^-15^ergs/cm^2^/s (2-8keV). We find a total of 761 X-ray point sources. In addition, we present the optical and infrared photometric catalog for the CLANS X-ray sources, as well as updated optical and infrared photometric catalogs for the X-ray sources in the CLASXS and CDF-N fields.
5103. Theoretical framework for RR Lyrae. II. MIR data
ID:
ivo://CDS.VizieR/J/ApJ/841/84
Title:
Theoretical framework for RR Lyrae. II. MIR data
Short Name:
J/ApJ/841/84
Date:
21 Oct 2021
Publisher:
CDS
Description:
We present new theoretical period-luminosity-metallicity (PLZ) relations for RR Lyrae stars (RRLs) at Spitzer and WISE wavelengths. The PLZ relations were derived using nonlinear, time-dependent convective hydrodynamical models for a broad range of metal abundances (Z=0.0001-0.0198). In deriving the light curves, we tested two sets of atmospheric models and found no significant difference between the resulting mean magnitudes. We also compare our theoretical relations to empirical relations derived from RRLs in both the field and in the globular cluster M4. Our theoretical PLZ relations were combined with multi-wavelength observations to simultaneously fit the distance modulus, {mu}0, and extinction, A_V_, of both the individual Galactic RRL and of the cluster M4. The results for the Galactic RRL are consistent with trigonometric parallax measurements from Gaia's first data release. For M4, we find a distance modulus of {mu}0=11.257+/-0.035mag with A_V_=1.45+/-0.12mag, which is consistent with measurements from other distance indicators. This analysis has shown that, when considering a sample covering a range of iron abundances, the metallicity spread introduces a dispersion in the PL relation on the order of 0.13mag. However, if this metallicity component is accounted for in a PLZ relation, the dispersion is reduced to ~0.02mag at mid-infrared wavelengths.
5104. The OTELO survey as morphological probe
ID:
ivo://CDS.VizieR/J/A+A/647/A89
Title:
The OTELO survey as morphological probe
Short Name:
J/A+A/647/A89
Date:
21 Oct 2021
Publisher:
CDS
Description:
The morphology of galaxies provide us with a unique tool to connect and understand other related physical properties and their changes over the course of cosmic time. Only recently, thanks to big and/or deep surveys, we have access to a wealth of data for unprecedented number galaxies. The morphological catalogue of the OTELO survey galaxies detected in Hubble Space Telescope (HST)-ACS F814W images is presented. We explore various methods from previous works to separate early-type (ET) and late-type (LT) galaxies classified via spectral energy distribution (SED) fittings using galaxy templates. Together with this article we release the catalogue containing main morphological parameters in F606W and F814W bands derived for more than 8000 sources. The morphological analysis is based on the single-Sersic profile fit. The GALAPAGOS-2 software was used in order to provide multi-wavelength morphological parameters fitted simultaneously in two HST-ACS bands. GALAPAGOS-2 detects, prepares guess values for GALFIT-M, and provides the best-fitting single-Sersic model in both bands for each source. Stellar masses were estimated using synthetic rest-frame magnitudes recovered from SED-fitting of galaxy templates. The morphological catalogue is complemented with concentration indexes from a separate SExtractor dual, high dynamical range mode. A total of 8812 sources were successfully fitted with single-Sersic profiles. The analysis of a carefully selected sample of ~3000 sources up to z_phot=2 is presented in this work, from which 873 sources were not detected in previous studies. We found no statistical evidence for the evolution of low-mass end of mass-size relation for ET and LT since z=2. Furthermore, we found a good agreement on the median size evolution for ET and LT galaxies, for a given stellar-mass, with data in the literature. Compared to previous works on faint field galaxies, we found similarities regarding rest-frame colours, Sersic and concentration indices.
5105. The Pan-STARRS release 1 (PS1) Survey - DR1
ID:
ivo://CDS.VizieR/II/349
Title:
The Pan-STARRS release 1 (PS1) Survey - DR1
Short Name:
II/349
Date:
21 Oct 2021
Publisher:
CDS
Description:
The Panoramic Survey Telescope and Rapid Response System (Pan-STARRS) is a system for wide-field astronomical imaging developed and operated by the Institute for Astronomy at the University of Hawaii. Pan-STARRS1 (PS1) is the first part of Pan-STARRS to be completed and is the basis for Data Release 1 (DR1). The PS1 survey used a 1.8m telescope and its 1.4 Gigapixel camera (GPC1) to image the sky in five broadband filters (g, r, i, z, y). PS1 took approximately 370000 exposures from 2010 to 2015. The PS1 camera surveyed the sky using 5 filters: g, r, i, z, and y. The effective wavelengths (and spectral resolutions) of these 5 filters are 481nm (R=3.5), 617nm (R=4.4), 752nm (R=5.8), 866nm (R=8.3), and 962nm (R=11.6), respectively. Please refer to Table 4 in Tonry+ (2012, J/ApJ/750/99) for bandpass details. Schlafly+ (2012ApJ...756..158S) provides updated zeropoints in Table 1. Data for this catalog has been retrieved from STScI and was built from ObjectThin and StackObjectThin tables with nDetections>2.
5106. The Phoenix Survey
ID:
ivo://CDS.VizieR/J/MNRAS/306/708
Title:
The Phoenix Survey
Short Name:
J/MNRAS/306/708
Date:
21 Oct 2021
Publisher:
CDS
Description:
Using a deep Australia Telescope Compact Array (ATCA) radio survey covering an area of ~3deg^2^ to a 4{sigma} sensitivity of >=100mmJy at 1.4GHz, we study the nature of faint radio galaxies. About 50 per cent of the detected radio sources are identified with an optical counterpart revealed by CCD photometry to m_R=22.5mag. Near-infrared (K-band) data are also available for a selected sample of the radio sources, while spectroscopic observations have been carried out for about 40 per cent of the optically identified sample. These provide redshifts and information on the stellar content. Emission-line ratios imply that most of the emission-line sources are star-forming galaxies, with a small contribution (~10 per cent) from Sy1/Sy2 type objects. We also find a significant number of absorption-line systems, likely to be ellipticals. These dominate at high flux densities (>1mJy) but are also found at sub-mJy levels. Using the Balmer decrement we find a visual extinction A_V_=1.0 for the star-forming faint radio sources. This moderate reddening is consistent with the V-R and R-K colours of the optically identified sources. For emission-line galaxies, there is a correlation between the radio power and the Halpha luminosity, in agreement with the result of Benn et al. (1993MNRAS.263....9B). This suggests that the radio emission of starburst radio galaxies is a good indicator of star formation activity.
5107. The Photometric Magnitude Difference Catalog
ID:
ivo://CDS.VizieR/II/235
Title:
The Photometric Magnitude Difference Catalog
Short Name:
II/235
Date:
21 Oct 2021
Publisher:
CDS
Description:
The Photometric Magnitude Difference Catalog is a collection of all double star photometric data which does not contain astrometric information and is therefore inappropriate for the Washington Double Star Catalog. Magnitude difference information can be useful in estimating mass ratios, determining photocentric positions which are color dependent, or into investigations of variability in close binary systems. Due to uncertainties in bandpass characteristics or variability, no summary line is presented, rather a complete listing of all data.
5108. The PMM USNO-A1.0 Catalogue
ID:
ivo://CDS.VizieR/I/243
Title:
The PMM USNO-A1.0 Catalogue
Short Name:
I/243
Date:
21 Oct 2021
Publisher:
CDS
Description:
USNO-A1.0 is a catalog of 488,006,860 sources whose positions can be used for astrometric references. These sources were detected by the Precision Measuring Machine (PMM) built and operated by the U. S. Naval Observatory Flagstaff Station during the scanning and processing of the Palomar Observatory Sky Survey I (POSS-I) O and E plates, the UK Science Research Council SRC-J survey plates, and the European Southern Observatory ESO-R survey plates. The PMM detects and processes at and beyond the nominal limiting magnitude of these surveys, but the large number of spurious detections requires that a filter be used to eliminate as many as possible. USNO-A's sole inclusion requirement was that there be spatially coincident detections (within a 2 arcsecond radius aperture) on the blue and red survey plate. For field centers of -30 degrees and above, data come from POSS-I plates, while data from field centers of -35 and below come from SRC-J and ESO-R plates.
5109. The population of pulsating variable stars in Sextans
ID:
ivo://CDS.VizieR/J/AJ/157/35
Title:
The population of pulsating variable stars in Sextans
Short Name:
J/AJ/157/35
Date:
21 Oct 2021
Publisher:
CDS
Description:
A large extension of the Sextans dwarf spheroidal galaxy, 7 deg^2^, has been surveyed for variable stars using the Dark Energy Camera at the Blanco Telescope at Cerro Tololo Inter-American Observatory, Chile. We report seven anomalous Cepheids, 199 RR Lyrae stars, and 16 dwarf Cepheids in the field. This is only the fifth extragalactic system in which dwarf Cepheids have been systematically searched. Henceforth, the new stars increase the census of stars coming from different environments that can be used to asses the advantages and limitations of using dwarf Cepheids as standard candles in populations for which the metallicity is not necessarily known. The dwarf Cepheids found in Sextans have a mean period of 0.066 day and a mean g amplitude of 0.87 mag. They are located below the horizontal branch, spanning a range of 0.8 mag: 21.9<g<22.7. The number of dwarf Cepheids in Sextans is low compared with other galaxies such as Carina, which has a strong intermediate-age population. On the other hand, the number and ratio of RR Lyrae stars to dwarf Cepheids are quite similar to those of Sculptor, a galaxy which, as Sextans, is dominated by an old stellar population. The dwarf Cepheid stars found in Sextans follow a well-constrained period-luminosity relationship with an rms=0.05 mag in the g band, which was set up by anchoring to the distance modulus given by the RR Lyrae stars. Although the majority of the variable stars in Sextans are located toward the center of the galaxy, we have found two RR Lyrae stars and one anomalous Cepheid in the outskirts of the galaxy that may be extratidal stars and suggest that this galaxy may be undergoing tidal destruction. These possible extratidal variable stars share the same proper motions as Sextans, as seen by recent Gaia measurements. Two additional stars that we initially classified as foreground RR Lyrae stars may actually be other examples of Sextans extratidal anomalous Cepheids, although radial velocities are needed to prove that scenario.
5110. The populations of Carina. II. Abundances
ID:
ivo://CDS.VizieR/J/ApJS/230/28
Title:
The populations of Carina. II. Abundances
Short Name:
J/ApJS/230/28
Date:
21 Oct 2021
Publisher:
CDS
Description:
Chemical abundances are presented for 19 elements in a sample of 63 red giants in the Carina dwarf spheroidal galaxy (dSph), based on homogeneous 1D/LTE model atmosphere analyses of our own observations (32 stars) and data available in the literature (a further 31 independent stars). The (Fe) metallicity and [{alpha}/Fe] distribution functions have mean values and dispersions of -1.59 and 0.33dex ([Fe/H] range: -2.68 to -0.64) and 0.07 and 0.13dex ([{alpha}/Fe] range: -0.27 to 0.25), respectively. We confirm the finding of Venn+ (2012, J/ApJ/751/102) that a small percentage (some 10% in the present investigation) of the sample shows clear evidence for significant enrichment by Type Ia supernova (SN Ia) ejecta. Calcium, with the most accurately determined abundance of the {alpha}-elements, shows an asymmetric distribution toward smaller values of [Ca/Fe] at all [Fe/H], most significantly over -2.0<[Fe/H]<-1.0, suggestive of incomplete mixing of the ejecta of SNe Ia with the ambient medium of each of Carina's generations. Approximate color-magnitude diagram age estimates are presented for the sample, and together with our chemical abundances, compared with the results of our previous synthetic color-magnitude diagram analysis, which reported the details of Carina's four well-defined populations. We searched for the Na-O anticorrelation universally reported in the Galaxy's globular clusters and confirm that this phenomenon does not exist in Carina. We also found that one of the 32 stars in our sample has an extremely enhanced lithium abundance-A(Li)_NLTE_=+3.36, consistent with membership of the ~1% group of Li-rich stars in dSph described by Kirby+ (2012ApJ...752L..16K).