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691. Radial velocities in 14 rich clusters
ID:
ivo://CDS.VizieR/J/AJ/95/284
Title:
Radial velocities in 14 rich clusters
Short Name:
J/AJ/95/284
Date:
21 Oct 2021
Publisher:
CDS
Description:
Heliocentric radial velocities accurate to <~50km/s are given for 1267 galaxies in the fields of 14 rich clusters from the Dressler (1980, Cat. <VII/174>) catalog (instead of 1268 velocities in 15 clusters as indicated in the title).
692. Radial Velocities of Galaxies
ID:
ivo://CDS.VizieR/VII/99
Title:
Radial Velocities of Galaxies
Short Name:
VII/99
Date:
21 Oct 2021
Publisher:
CDS
Description:
This catalog lists coordinates, names, and radial velocities for 8250 galaxies scattered over the whole sky. Both optical and radio measures are included. The individual values are given as published, with a reference to each, but no unpublished data are included. An attempt was made to obtain the most accurate coordinates for each object rather than relying on the source papers. In addition to the positions and heliocentric velocities, the catalog contains a name of the galaxy, whether the observation is made by radio or optically, the mean error of the velocity, a correction for the galactic motion of the Sun, and comments. This electronic version is a slightly improved version compared to the published one, and contains more names. References and notes are not included, and the user must refer to the printed version to get them.
693. Radial Velocities of the local universe
ID:
ivo://CDS.VizieR/J/A+AS/102/57
Title:
Radial Velocities of the local universe
Short Name:
J/A+AS/102/57
Date:
21 Oct 2021
Publisher:
CDS
Description:
This paper is the second one in a series dedicated to the study of the kinematics of the local universe. It gives 361 new optical and radio redshifts measured at ESO, OHP and Nancay Observatories.
694. Radio-optical reference frame link
ID:
ivo://CDS.VizieR/I/325
Title:
Radio-optical reference frame link
Short Name:
I/325
Date:
21 Oct 2021
Publisher:
CDS
Description:
Between 1997 and 2004 several observing runs were conducted mainly with the CTIO 0.9m to image ICRF counterparts (mostly QSOs) in order to determine accurate optical positions. Contemporary to these deep CCD images the same fields were observed with the USNO astrograph in the same bandpass. These provide accurate positions on the Hipparcos/Tycho-2 system for stars in the 10 to 16 magnitude range used as reference stars for the deep CCD imaging data. Here we present final optical position results of 413 sources based on astrograph data reductions using UCAC2 and UCAC4 type reference stars. These optical positions are compared to radio VLBI positions. The current optical system is not perfectly aligned to the ICRF radio system with rigid body rotation angles of 3 to 5 mas (3{sigma}) found between them for all 3 axes. Furthermore, statistically, the optical-radio position differences are found to exceed the total, combined, known errors in the observations. Systematic errors in the optical reference stars as well as physical offsets between the centers of optical and radio emissions are both identified as likely causes. A detrimental, astrophysical, random noise (DARN) component is postulated to be on about the 10mas level. If confirmed by future observations, this could severely limit the Gaia to ICRF reference frame alignment accuracy to an error of about 0.5mas per coordinate axis with the current number of sources envisioned to provide the link. A list of 36 ICRF sources without the detection of an optical counterpart to a limiting magnitude of about R=22 is provided as well.
695. Radio source selection for the ICRF
ID:
ivo://CDS.VizieR/J/A+A/493/317
Title:
Radio source selection for the ICRF
Short Name:
J/A+A/493/317
Date:
21 Oct 2021
Publisher:
CDS
Description:
The most accurate realization of a quasi inertial reference frame, the International Celestial Reference Frame (ICRF), is made of 212 defining extragalactic radio sources whose coordinates are determined using VLBI observations. Recent studies demonstrated however that using other sets of sources could improve the frame stability. This study examines a simple radio source selection scheme to define celestial reference frame axes more stable than the ones as currently defined by the ICRF. After having derived source coordinate time series from 26 years of VLBI observations, we select the most suitable sources on the basis of their positional variability (rms and slope), and observational history. We determine the axis stability of the frame defined by the selection, as well as its suitability for global geodetic VLBI analyses, i.e., determination of Earth orientation parameters and source and station coordinates.
696. RASS: clusters of galaxies around SGP
ID:
ivo://CDS.VizieR/J/ApJS/140/239
Title:
RASS: clusters of galaxies around SGP
Short Name:
J/ApJS/140/239
Date:
21 Oct 2021
Publisher:
CDS
Description:
A field of 1.013sr in the ROSAT All-Sky Survey (RASS), centered on the south Galactic pole (SGP), has been searched in a systematic, objective manner for clusters of galaxies. The procedure relied on a correlation of the X-ray positions and properties of ROSAT sources in the field with the distribution of galaxies in the COSMOS digitized database, which was obtained from scanning the plates of the UK Schmidt IIIa-J optical survey of the southern sky. The study used the second ROSAT survey database (RASS-2) and included several optical observing campaigns to measure cluster redshifts. The search, which is a precursor to the larger REFLEX survey encompassing the whole southern sky, reached the detection limits of both the RASS and the COSMOS data and yielded a catalog of 186 clusters in which the lowest flux is 1.5x10-12ergs/cm^2^/s in the 0.1-2.4keV band. Of these 157 have measured redshifts. Using a flux limit of 3.0x10-12ergs/cm^2^/s a complete subset of 112 clusters was obtained, of which 110 have measured redshifts. The spatial distribution of the X-ray clusters out to a redshift of 0.15 shows an extension of the Local Supercluster to the Pisces-Cetus supercluster (z<0.07), and an orthogonal structure at higher redshift (0.07<z<0.15). This result is consistent with large-scale structure suggested by optical surveys.
697. RAVE - 4th data release
ID:
ivo://aip.gavo.org/ravedr4/q/cone
Title:
RAVE - 4th data release
Short Name:
rave cone search
Date:
17 Jul 2024 11:34:41
Publisher:
GAVO at Leibniz-Institute for Astrophysics Potsdam
Description:
This service gives access to the 4th data release of RAVE (RAdial Velocity Experiment). It contains radial velocities of stars, stellar atmospheric parameters, some abundances and distances.
698. RC2 Catalogue
ID:
ivo://CDS.VizieR/VII/112
Title:
RC2 Catalogue
Short Name:
VII/112
Date:
21 Oct 2021
Publisher:
CDS
Description:
This standardized documentation file does not contain a complete description of the electronic version of the RC2 catalogue; please refer to the "doc.tex" file prepared by Theresa A. Nagy and Robert S. Hill.
699. RC3 corrections and additions
ID:
ivo://CDS.VizieR/J/AJ/108/2128
Title:
RC3 corrections and additions
Short Name:
J/AJ/108/2128
Date:
21 Oct 2021
Publisher:
CDS
Description:
Lists of corrections and additions to the Third Reference Catalogue of Bright Galaxies (RC3, Cat. <VII/155>) are given. The corrected version of the catalogue (RC3.9b), dated April 1994, is currently available through the national data centers.
700. Recently quenched elliptical galaxies in SDSS
ID:
ivo://CDS.VizieR/J/MNRAS/442/533
Title:
Recently quenched elliptical galaxies in SDSS
Short Name:
J/MNRAS/442/533
Date:
21 Oct 2021
Publisher:
CDS
Description:
We use the Sloan Digital Sky Survey to investigate the properties of massive elliptical galaxies in the local Universe (z<=0.08) that have unusually blue optical colours. Through careful inspection, we distinguish elliptical from non-elliptical morphologies among a large sample of similarly blue galaxies with high central light concentrations (c_r_>=2.6). These blue ellipticals comprise 3.7 per cent of all c_r>=2.6 galaxies with stellar masses between 10^10^ and 10^11^h^-2^M_{sun}_. Using published fibre spectrum diagnostics, we identify a unique subset of 172 non-star-forming ellipticals with distinctly blue urz colours and young (<3Gyr) light-weighted stellar ages. These recently quenched ellipticals (RQEs) have a number density of 2.7-4.7x10^-5^h^3^/Mpc^3^ and sufficient numbers above 2.5x10^10^h^-2^M_{sun}_ to account for more than half of the expected quiescent growth at late cosmic time assuming that this phase lasts 0.5Gyr. RQEs have properties that are consistent with a recent merger origin (i.e. they are strong 'first-generation' elliptical candidates), yet few involved a starburst strong enough to produce an E+A signature. The preferred environment of RQEs (90 per cent reside at the centres of <3x10^12^h^-1^M_{sun}_ groups) agrees well with the 'small group scale' predicted for maximally efficient spiral merging on to their halo centre and rules out satellite-specific quenching processes. The high incidence of Seyfert and LINER activity in RQEs and their plausible descendants may heat the atmospheres of small host haloes sufficiently to maintain quenching.

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