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2301. Catalogue of OB Associations
ID:
ivo://CDS.VizieR/J/other/NewAR/90.1549
Title:
Catalogue of OB Associations
Short Name:
J/other/NewAR/90
Date:
21 Oct 2021
Publisher:
CDS
Description:
OB associations are unbound groups of young stars made prominent by their bright OB members, and have long been thought to be the expanded remnants of dense star clusters. They have been important in astrophysics for over a century thanks to their luminous massive stars, though their low-mass members have not been well studied until the last couple of decades. This has changed thanks to data from X-ray observations, spectroscopic surveys and astrometry from Gaia that allows their full stellar content to be identified and their dynamics to be studied, which in turn is leading to changes in our understanding of these systems and their origins, with the old picture of Blaauw (1964a) now being superseded. It is clear now that OB associations have considerably more substructure than once envisioned, both spatially, kinematically and temporally. These changes have implications for the star formation process, the formation and evolution of planetary systems, and the build-up of stellar populations across galaxies.
2302. Catalogue of Open Cluster Data (COCD)
ID:
ivo://CDS.VizieR/J/A+A/438/1163
Title:
Catalogue of Open Cluster Data (COCD)
Short Name:
J/A+A/438/1163
Date:
21 Oct 2021
Publisher:
CDS
Description:
The catalogue is a result of studies of wide neighborhoods of 513 open clusters and 7 compact associations carried out in high precision homogeneous all sky catalogue ASCC-2.5 (Kharchenko, 2001, Cat. <I/280>). On the basis of data on about 33000 possible members (including about 10000 most probable ones) and homogeneous methods of cluster parameter determination the angular sizes of cluster cores and coronae, cluster heliocentric distances, mean proper motions, mean radial velocities and ages were established and collected in the COCD. These include cluster distances for 200 clusters, average cluster radial velocities for 94 clusters, and cluster ages for 195 clusters derived for the first time. Clusters in the catalogue are sorted by right ascension J2000 order. The Open Cluster Diagrams Atlas (OCDA) presents a set of open cluster diagrams used for the determination of parameters of 513 open clusters and 7 compact associations, and is intended to illustrate the quality of the constructed cluster membership (Kharchenko et al., 2004, Cat. <J/AN/425/740>), and the accuracy of the derived cluster parameters (this paper). Every diagram presents relation between various stellar data from all sky catalogue ASCC-2.5 (Kharchenko 2001, Cat. <I/280>) in area of the specific cluster. There are five diagrams provided for every cluster in the Atlas: the area map, the density profile, the vector point diagram, the magnitude equation diagram, and the color-magnitude diagram. The OCDA consists of 520 PostScript plots stored as gzipped files (i.e. one file per cluster).
2303. Catalogue of open cluster parameters from UBV-data.
ID:
ivo://CDS.VizieR/V/96
Title:
Catalogue of open cluster parameters from UBV-data.
Short Name:
V/96
Date:
21 Oct 2021
Publisher:
CDS
Description:
The authors constructed the homogeneous set of galactic open cluster parameters (reddenings, distances, ages and partly metallicities) using published UBV-photometry data (Loktin, Matkin, 1992). The catalogue contains data on 340 clusters.
2304. Catalogue of planetary nebulae central stars
ID:
ivo://CDS.VizieR/J/A+A/640/A10
Title:
Catalogue of planetary nebulae central stars
Short Name:
J/A+A/640/A10
Date:
21 Oct 2021
Publisher:
CDS
Description:
Planetary nebulae represent a potential late stage of stellar evolution, however, their central stars (CSPNe) are relatively faint and, therefore, pertinent information is available for merely <20% of the Galactic sample. Consequently, the literature was surveyed to construct a new catalogue of 620 CSPNe featuring important spectral classifications and information. The catalogue supersedes the existing iteration by 25% and includes physical parameters such as luminosity, surface gravity, temperature, magnitude estimates, and references for published spectra. The marked statistical improvement enabled the following pertinent conclusions to be determined: the H-rich/H-poor ratio is 2:1, there is a deficiency of CSPNe with types [WC 5-6], and nearly 80% of binary central stars belong to the H-rich group. The last finding suggests that evolutionary scenarios leading to the formation of binary central stars interfere with the conditions required for the formation of H-poor CSPN. Approximately 50% of the sample with derived values of logL, logT_eff_, and logg, exhibit masses and ages consistent with single stellar evolutionary models. The implication is that single stars are indeed able to form planetary nebulae. Moreover, it is shown that H-poor CSPNe are formed by higher mass progenitors.
2305. Catalogue of Principal Galaxies (PGC)
ID:
ivo://CDS.VizieR/VII/119
Title:
Catalogue of Principal Galaxies (PGC)
Short Name:
VII/119
Date:
21 Oct 2021
Publisher:
CDS
Description:
This "catalog of principal galaxies" constitutes the basis of the "Third Reference Catalogue of Bright Galaxies" (RC3). It lists equatorial coordinates for the equinoxes 1950 and 2000 and cross identifications for 73197 galaxies. Of the 73197 galaxies, 40932 have coordinates with standard deviations of less than ten arcsec. Listed are 131,601 names from the 38 most common sources. These data are given when available: morphological descriptions, apparent major and minor axes, apparent magnitudes, radial velocities, and position angles.
2306. Catalogue of quasar candidates
ID:
ivo://CDS.VizieR/J/MNRAS/247/182
Title:
Catalogue of quasar candidates
Short Name:
J/MNRAS/247/182
Date:
21 Oct 2021
Publisher:
CDS
Description:
This paper gives a list of all quasar candidates obtained from an automated computer search performed on 11 grens plates. The description of the main characteristics of the survey is given along with the latest improvements in the selection techniques. Particular attention has been paid to understanding and quantifying selection effects. This allows the construction of homogeneous samples having well-understood characteristics. The noteworthy aspect of our homogenization process is the correction that we apply to our probability classes in order to take into account the signal-to-noise differences; at a given magnitude, among plates of different limiting magnitudes. Since such homogeneous material is rare, this catalogue is of general interest. Each grens plate covers about 1 square degree with typical limiting magnitude of B~21. Data are given with all relevant quantities needed to understand the characteristics of the survey. We expect that over 100 of the 125 higher probability class candidates are quasars. A third of the ~400 lower probability objects should also be quasars. This material is well-suited to follow-up spectroscopy with fibre spectrographs.
2307. Catalogue of Radio Stars
ID:
ivo://CDS.VizieR/VIII/99
Title:
Catalogue of Radio Stars
Short Name:
VIII/99
Date:
21 Oct 2021
Publisher:
CDS
Description:
The first version of this catalogue was published in Abh.Hamburger Sternw. 1978, Vol.10, p 1ff. (CDS Catalogue II/129). A second version was published in 1987 (1987A&AS...69...87W) and microfiches (CDS Catalogue II/147). A third version was published 1995A&AS..109..177W (CDS Catalogue II/199). The basic concept of the earlier versions is preserved (in file "catalog.txt"), namely one entry per star per frequency per paper. Space is now provided, however, to add more informations. These may be of technical or astronomical nature. Usually month and year of observation and the number of independent data points or length of monitoring session are given. In the file "catalog.txt", all radio data are preceded by a header which contains information on the star or stellar system. (Note, that a physical stellar system is regarded as one single entry and that comments pertaining to individual components are found directly behind the observational data). Stellar data like names, position, proper motion, magnitudes and spectroscopic types are given in fixed format in a self-explanatory fashion. It is tried to have typical values from commonly available references. It is not intended to compete here with other compilations. These header informations are collected when the star is entered for the first time. They are only changed when new values are available while additional radio references are added. An arbitrarily expandable section for unformatted text finishes the header. Finally, the units of the radio data remain in MHz (column#1) and mJy (columns #2. and #3). All coordinates refer to epoch and equinox 1950.0 (e.g. B1950). This is a so-called merged version e.g. all stars, those detected at least once and those with upper limits only, are listed in order of ascending right ascension. The detected stars are marked with a "D" in the outermost right hand column in lines 1 to 5 ('D' in column "Det" of the file "stars.dat"). The last updating occurred on 2001-Mar-06. In this version stars have new running numbers.
2308. Catalogue of Reflection Nebulae
ID:
ivo://CDS.VizieR/VII/21
Title:
Catalogue of Reflection Nebulae
Short Name:
VII/21
Date:
21 Oct 2021
Publisher:
CDS
Description:
A catalogue is given of all BD and CD stars north of -33deg which are surrounded by reflection nebulosity visible on both the blue and red prints of the Palomar Sky Survey. The nearer reflection nebulae lie predominantly along Gould's Belt, whereas the more distant ones are concentrated to the galactic plane. The data outline 13 associations of reflection nebulae, some of which coincide with known OB or T associations. Attention is drawn to the fact that most reflection nebulae are illuminated by the integrated light of the Milky Way. The integrated radiation will be more intense above and below the galactic plane then in the galactic plane where the nuclear bulge of the Galaxy and most of the disk are obscured by interstellar absorption.
2309. Catalogue of ROSAT White Dwarfs
ID:
ivo://CDS.VizieR/J/A+A/316/147
Title:
Catalogue of ROSAT White Dwarfs
Short Name:
J/A+A/316/147
Date:
21 Oct 2021
Publisher:
CDS
Description:
Table1 lists all white dwarf stars, both previously-catalogued and newly discovered, which have been detected in the ROSAT All-Sky Survey. The positions and count rates of the X-ray sources associated with each star are given, as well as spectral types and other star names for those stars which have been previously catalogued. Table2 lists distances estimated via Balmer line profile fitting, corrected (for IS absorption) X-ray luminosities, and each star's contribution to the X-ray luminosity function for all DA white dwarfs which were detected in the ROSAT All-Sky Survey.
2310. Catalogue of RR Lyrae from NSVS
ID:
ivo://CDS.VizieR/J/MNRAS/368/1757
Title:
Catalogue of RR Lyrae from NSVS
Short Name:
J/MNRAS/368/1757
Date:
21 Oct 2021
Publisher:
CDS
Description:
A search for RR Lyrae stars has been conducted in the publicly available data of the Northern Sky Variability Survey. Candidates have been selected by the statistical properties of their variation; the standard deviation, skewness and kurtosis with appropriate limits determined from a sample 314 known RRab and RRc stars listed in the General Catalogue of Variable Stars. From the period analysis and light-curve shape of over 3000 candidates 785 RR Lyrae have been identified of which 188 are previously unknown. The light curves were examined for the Blazhko effect and several new stars showing this were found. Six double-mode RR Lyrae stars were also found of which two are new discoveries. Some previously known variables have been reclassified as RR Lyrae stars and similarly some RR Lyrae stars have been found to be other types of variable, or not variable at all.

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