Search

Start Over Subject astronomical reference materials Content Level Research Validation Level 2
1. A catalog of globular cluster systems
ID:
ivo://CDS.VizieR/J/ApJ/772/82
Title:
A catalog of globular cluster systems
Short Name:
J/ApJ/772/82
Date:
21 Oct 2021
Publisher:
CDS
Description:
We present a catalog of 422 galaxies with published measurements of their globular cluster (GC) populations. Of these, 248 are E galaxies, 93 are S0 galaxies, and 81 are spirals or irregulars. Among various correlations of the total number of GCs with other global galaxy properties, we find that N_GC_ correlates well though nonlinearly with the dynamical mass of the galaxy bulge M_dyn_=4{sigma}_e_^2^R_e_/G, where {sigma}_e_ is the central velocity dispersion and R_e_ the effective radius of the galaxy light profile. We also present updated versions of the GC specific frequency S_N_ and specific mass S_M_ versus host galaxy luminosity and baryonic mass. These graphs exhibit the previously known U-shape: highest S_N_ or S_M_ values occur for either dwarfs or supergiants, but in the midrange of galaxy size (10^9^-10^10^L_{sun}_) the GC numbers fall along a well-defined baseline value of S_N_=~1 or S_M_=0.1, similar among all galaxy types. Along with other recent discussions, we suggest that this trend may represent the effects of feedback, which systematically inhibited early star formation at either very low or very high galaxy mass, but which had its minimum effect for intermediate masses. Our results strongly reinforce recent proposals that GC formation efficiency appears to be most nearly proportional to the galaxy halo mass M_halo_. The mean "absolute" efficiency ratio for GC formation that we derive from the catalog data is M_GCS_/M_halo_=6x10^-5^. We suggest that the galaxy-to-galaxy scatter around this mean value may arise in part because of differences in the relative timing of GC formation versus field-star formation. Finally, we find that an excellent empirical predictor of total GC population for galaxies of all luminosities is N_GC_~(R_e_{sigma}_e_)^1.3^, a result consistent with fundamental plane scaling relations.
2. A catalogue of Mg_2_ indices
ID:
ivo://CDS.VizieR/J/A+AS/132/255
Title:
A catalogue of Mg_2_ indices
Short Name:
J/A+AS/132/255
Date:
21 Oct 2021
Publisher:
CDS
Description:
We present a catalogue of published absorption-line Mg_2_ index measurements of galaxies and globular clusters. The catalogue consists in four tables and is maintained up-to-date in the database HYPERCAT (http://www-obs.univ-lyon1.fr/~prugniel/cgi-bin/hypercat/). The measurements are listed together with the references to the original articles where the data were published. A coded description of the observations is provided. Compiled raw data are aperture- corrected and, when it is possible, transformed to the homogeneous system. The zeropoints and re-scaling of errors are provided. The catalogue gather in total 3706 measurements for 1409 objects from 70 datasets. Total of 46 different publications were used to compile the catalogue. This catalogue will be updated. Check at the above given URL for recent version.
3. A comprehensive statistical study of gamma-ray bursts
ID:
ivo://CDS.VizieR/J/ApJ/893/77
Title:
A comprehensive statistical study of gamma-ray bursts
Short Name:
J/ApJ/893/77
Date:
07 Mar 2022 07:29:40
Publisher:
CDS
Description:
In order to obtain an overview of gamma-ray bursts (GRBs), we need a full sample. In this paper, we collected 6289 GRBs (from GRB 910421 to GRB 160509A) from the literature, including their prompt emission, afterglow, and host galaxy properties. We hope to use this large sample to reveal the intrinsic properties of GRBs. We have listed all of the data in machine-readable tables, including the properties of the GRBs, correlation coefficients and linear regression results of two arbitrary parameters, and linear regression results of any three parameters. These machine-readable tables could be used as a data reservoir for further studies on the classifications or correlations. One may find some intrinsic properties from these statistical results. With these comprehensive tables, it is possible to find relations between different parameters and to classify the GRBs into different subgroups. Upon completion, they may reveal the nature of GRBs and may be used as tools like pseudo-redshift indicators, standard candles, etc.
4. A Reference List for the UBV System
ID:
ivo://CDS.VizieR/II/48
Title:
A Reference List for the UBV System
Short Name:
II/48
Date:
21 Oct 2021
Publisher:
CDS
Description:
This catalog is a file of 13422 records giving for each star, an identification, V, B-V, and U-B. Care was taken to place all measurements on the Johnson UBV system by determining possible systematic differences between measurements by Johnson and those by other observers.
5. BANYAN. XI. The BANYAN {Sigma} algorithm
ID:
ivo://CDS.VizieR/J/ApJ/856/23
Title:
BANYAN. XI. The BANYAN {Sigma} algorithm
Short Name:
J/ApJ/856/23
Date:
21 Oct 2021
Publisher:
CDS
Description:
BANYAN {Sigma} is a new Bayesian algorithm to identify members of young stellar associations within 150pc of the Sun. It includes 27 young associations with ages in the range ~1-800Myr, modeled with multivariate Gaussians in six-dimensional (6D) XYZUVW space. It is the first such multi-association classification tool to include the nearest sub-groups of the Sco-Cen OB star-forming region, the IC2602, IC2391, Pleiades and Platais 8 clusters, and the {rho} Ophiuchi, Corona Australis, and Taurus star formation regions. A model of field stars is built from a mixture of multivariate Gaussians based on the Besancon Galactic model. The algorithm can derive membership probabilities for objects with only sky coordinates and proper motion, but can also include parallax and radial velocity measurements, as well as spectrophotometric distance constraints from sequences in color-magnitude or spectral type-magnitude diagrams. BANYAN {Sigma} benefits from an analytical solution to the Bayesian marginalization integrals over unknown radial velocities and distances that makes it more accurate and significantly faster than its predecessor BANYAN II. A contamination versus hit rate analysis is presented and demonstrates that BANYAN {Sigma} achieves a better classification performance than other moving group tools available in the literature, especially in terms of cross-contamination between young associations. An updated list of bona fide members in the 27 young associations, augmented by the Gaia-DR1 release, as well as all parameters for the 6D multivariate Gaussian models for each association and the Galactic field neighborhood within 300 pc are presented.
6. BH masses & host galaxy dispersion vel.
ID:
ivo://CDS.VizieR/J/ApJ/831/134
Title:
BH masses & host galaxy dispersion vel.
Short Name:
J/ApJ/831/134
Date:
21 Oct 2021
Publisher:
CDS
Description:
According to the virial theorem, all gravitational systems in equilibrium sit on a plane in the three-dimensional parameter space defined by their mass, size, and second moment of the velocity tensor. While these quantities cannot be directly observed, there are suitable proxies: the luminosity L_k_, half-light radius R_e_, and dispersion {sigma}_e_. These proxies indeed lie on a very tight fundamental plane (FP). How do the black holes (BHs) in the centers of galaxies relate to the FP? Their masses are known to exhibit no strong correlation with total galaxy mass, but they do correlate weakly with bulge mass (when present), and extremely well with the velocity dispersion through the M_{bullet}_{propto}{sigma}_e_^5.4^ relation. These facts together imply that a tight plane must also exist defined by BH mass, total galaxy mass, and size. Here, I show that this is indeed the case using a heterogeneous set of 230 BHs. The sample includes BHs from zero to 10 billion solar masses and host galaxies ranging from low surface brightness dwarfs, through bulgeless disks, to brightest cluster galaxies. The resulting BH-size-luminosity relation M_{bullet}_{propto}(L_k_/R_e_)^3.8^ has the same amount of scatter as the M_*_-{sigma} relation and is aligned with the galaxy FP, such that it is just a reprojection of {sigma}_e_. The inferred BH-size-mass relation is M_{bullet}_{propto}(M_*_/R_e_)^2.9^. These relationships are universal and extend to galaxies without bulges. This implies that the BH is primarily correlated with its global velocity dispersion and not with the properties of the bulge. I show that the classical bulge-mass relation is a projection of the M_*_-{sigma} relation. When the velocity dispersion cannot be measured (at high z or low dispersions), the BH-size-mass relation should be used as a proxy for BH mass in favor of just galaxy or bulge mass.
7. Bibliography of Statistical Methods in Astronomy
ID:
ivo://CDS.VizieR/VI/37
Title:
Bibliography of Statistical Methods in Astronomy
Short Name:
VI/37
Date:
21 Oct 2021
Publisher:
CDS
Description:
This catalog contains a bibliography of statistical data analysis and pattern recognition algorithms that are multivariate. References to computer packages and books are given. The catalog is divided into nine sections, each with astronomical and general headings, and is offered in two versions, LaTeX and ASCII.
8. Bibliography of stellar radial velocities
ID:
ivo://CDS.VizieR/III/4
Title:
Bibliography of stellar radial velocities
Short Name:
III/4
Date:
21 Oct 2021
Publisher:
CDS
Description:
The data file contains a bibliography of 44,000 radial velocities for about 25,000 stars, from a compilation of about 2340 publications (see the "Note (3)" below). The authors estimate that 99% of stellar radial velocities published by June 1970 are contained in the surveyed volumes.
9. Bibliography of Surface Photometry of galaxies
ID:
ivo://CDS.VizieR/VII/39A
Title:
Bibliography of Surface Photometry of galaxies
Short Name:
VII/39A
Date:
21 Oct 2021
Publisher:
CDS
Description:
(adapted from the "Documentation for the Machine-Readable Version of the Detailed bibliography of the surface photometry of galaxies by Lee E. Brotzman and Robert S. Hill (ADC), SASC-T-1-5810-5006-84, July 1984) The bibliography supplies coded information about the methods of observation and reduction, types of photometric data, limiting surface brightness, and the general purpose of each paper for about 650 galaxies and 300 references.

Limit your search

more »