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21. AAVSO Photometric All Sky Survey ConeSearch
ID:
ivo://archive.stsci.edu/catalogs/APASS
Title:
AAVSO Photometric All Sky Survey ConeSearch
Short Name:
APASS CS
Date:
23 Jul 2020 19:59:03
Publisher:
Space Telescope Science Institute Archive
Description:
All MAST catalog holdings are available via Cone Search endpoints. This service provides access to the MAST mirror of the AAVSO Photometric All Sky Survey All available missions are listed at http://archive.stsci.edu/vo/mast_services.html.
22. AB And UBV photometry
ID:
ivo://CDS.VizieR/J/A+AS/106/373
Title:
AB And UBV photometry
Short Name:
J/A+AS/106/373
Date:
21 Oct 2021
Publisher:
CDS
Description:
(no description available)
23. A Bayesian search for binaries in Hipparcos
ID:
ivo://CDS.VizieR/J/ApJS/192/2
Title:
A Bayesian search for binaries in Hipparcos
Short Name:
J/ApJS/192/2
Date:
21 Oct 2021
Publisher:
CDS
Description:
We develop Bayesian statistical methods for discovering and assigning probabilities to non-random (e.g., physical) stellar companions. These companions are either presently bound or were previously bound. The probabilities depend on similarities in corrected proper motion parallel and perpendicular to the brighter component's motion, parallax, and the local phase-space density of field stars. Control experiments are conducted to understand the behavior of false positives. The technique is applied to the Hipparcos Catalogue (Cat. I/239) within 100pc. This is the first all-sky survey to locate escaped companions still drifting along with each other. In the <100pc distance range, ~220 high probability companions with separations between 0.01 and 1pc are found. The first evidence for a population (~300) of companions separated by 1-8pc is found.
24. Abbadia Catalogue between +5{deg}15 and -3{deg}15'
ID:
ivo://CDS.VizieR/I/65
Title:
Abbadia Catalogue between +5{deg}15 and -3{deg}15'
Short Name:
I/65
Date:
21 Oct 2021
Publisher:
CDS
Description:
The catalogue contains the mean positions of 13532 stars observed at the Abbadia Observatory (near Hendaye, France), from observations made at the between 1906 and 1912 with the meridien circle of the observatory. The observations were made mainly for the reduction of the Alger zone of the Astrographic Catalogue. The original catalogue contains also approximative magnitudes which are not reported here.
25. Abbadia Catalogue of 14263 Stars, +16 to +24{deg}
ID:
ivo://CDS.VizieR/I/57
Title:
Abbadia Catalogue of 14263 Stars, +16 to +24{deg}
Short Name:
I/57
Date:
21 Oct 2021
Publisher:
CDS
Description:
This catalog contains meridian circle observations of 14192 reference stars in the Paris Observatory zone of the Astrographic Catalog, +16 to +24deg, made from 1899 to 1906. The original catalog contains also a supplement of 81 stars, which is not included here. The positions have been reduced to 1900.0 on the basis of Newcomb's constants. The probable errors for most stars range from 0.0093s to 0.0161s in right ascension and from 0.096" to 0.162" in declination, depending on the number of observations. In addition to the positions, the catalog contains a running number, the magnitude from the Berlin catalogs, the mean epoch and number of observations, and the BD number.
26. ABCG209 spectroscopic and photometric catalog
ID:
ivo://CDS.VizieR/J/MNRAS/387/1374
Title:
ABCG209 spectroscopic and photometric catalog
Short Name:
J/MNRAS/387/1374
Date:
21 Oct 2021
Publisher:
CDS
Description:
This paper is aimed at giving an overview of the global properties of the rich cluster of galaxies ABCG 209. This is achieved by complementing the already available data with new medium-resolution spectroscopy and near-infrared (NIR) photometry which allow us to (i) analyse in detail the cluster dynamics, distinguishing among galaxies belonging to different substructures and deriving their individual velocity distributions, using a total sample of 148 galaxies in the cluster region, of which 134 belonging to the cluster; (ii) derive the cluster NIR luminosity function; (iii) study the Kormendy relation and the photometric plane of cluster early-type galaxies (ETGs). Finally we provide an extensive photometric (optical and NIR) and spectroscopic data set for such a complex system to be used in further analyses investigating the nature, formation and evolution of rich clusters of galaxies.
27. ABCG 85 velocities catalogue
ID:
ivo://CDS.VizieR/J/A+AS/129/281
Title:
ABCG 85 velocities catalogue
Short Name:
J/A+AS/129/281
Date:
21 Oct 2021
Publisher:
CDS
Description:
We present a catalogue of velocities for 551 galaxies (and give the coordinates of 39 stars misclassified as galaxies in our photometric plate catalogue) in a region covering about 100'x100' (0.94x0.94Mpc for an average redshift of 0.0555, assuming H_0_=50km/s/Mpc) in the direction of the rich cluster ABCG85. This catalogue includes previously published redshifts by Beers et al. (1991AJ....102.1581B) and Malumuth et al. (1992AJ....104..495M), together with our 367 new measurements. A total of 305 galaxies have velocities in the interval 13350-20000km/s, and will be considered as members of the cluster. ABCG 85 therefore becomes one of the clusters with the highest number of measured redshifts; its optical properties are being investigated in a companion paper.
28. AB Dor A VLBI images
ID:
ivo://CDS.VizieR/J/A+A/641/A90
Title:
AB Dor A VLBI images
Short Name:
J/A+A/641/A90
Date:
21 Oct 2021
Publisher:
CDS
Description:
The fast rotator, pre-main sequence star AB Dor A is a strong and persistent radio emitter. The extraordinary coronal flaring activity is thought to be the origin of compact radio emission and other associated phenomena, such as large slingshot prominences. We aim to investigate the radio emission mechanism and the milliarcsecond radio structure around AB Dor A. We performed phase-referenced VLBI observations at 22.3GHz, 8.4GHz, and 1.4GHz over more than one decade using the Australian VLBI array. Our 8.4GHz images show a double core-halo morphology, similar at all epochs, with emission extending at heights between 5 and 18 stellar radii. Furthermore, the sequence of the 8.4GHz maps shows a clear variation of the source structure within the observing time. However, images at 1.4GHz and 22.3GHz are compatible with a compact source. The phase-reference position at 8.4GHz and 1.4GHz are coincident with those expected from the well-known milliarcsecond-precise astrometry of this star, meanwhile the 22.3GHz position is 4sigma off the prediction in the north-west direction. The origin of this offset is still unclear. We have considered several models to explain the morphology and evolution of the inner radio structure detected in AB Dor A. These models include emission from the stellar polar caps, a flaring, magnetically-driven loop structure, and the presence of helmet streamers. We also investigated a possible close companion to AB Dor A. Our results confirm the extraordinary coronal magnetic activity of this star, capable of producing compact radio structures at very large heights that have so far only been seen in binary interacting systems.
29. Abell 3391-Abell 3395 ASKAP/EMU image
ID:
ivo://CDS.VizieR/J/A+A/647/A3
Title:
Abell 3391-Abell 3395 ASKAP/EMU image
Short Name:
J/A+A/647/A3
Date:
21 Oct 2021
Publisher:
CDS
Description:
The pre-merging system of galaxy clusters Abell 3391-Abell 3395 located at a mean redshift of 0.053 has been observed at 1GHz in an ASKAP/EMU Early Science observation as well as in X-rays with eROSITA. The projected separation of the X-ray peaks of the two clusters is ~50{deg} or ~3.1Mpc. Here we present an inventory of interesting radio sources in this field around this cluster merger. While the eROSITA observations provide clear indications of a bridge of thermal gas between the clusters, neither ASKAP nor MWA observations show any diffuse radio emission coinciding with the X-ray bridge. We derive an upper limit on the radio emissivity in the bridge region of <J>_1GHz_<1.2x10^-44^W/H/m3. A non-detection of diffuse radio emission in the X-ray bridge between these two clusters has implications for particle-acceleration mechanisms in cosmological large-scale structure. We also report extended or otherwise noteworthy radio sources in the 30deg^2^ field around Abell 3391-Abell 3395. We identified 20 Giant Radio Galaxies, plus 7 candidates, with linear projected sizes greater than 1Mpc. The sky density of field radio galaxies with largest linear sizes of >0.7Mpc is ~1.7deg^2^, three times higher than previously reported. We find no evidence for a cosmological evolution of the population of Giant Radio Galaxies. Moreover, we find seven candidates for cluster radio relics and radio halos.
30. Abell 983 and Abell 1731 NIR fluxes
ID:
ivo://CDS.VizieR/J/A+A/588/A105
Title:
Abell 983 and Abell 1731 NIR fluxes
Short Name:
J/A+A/588/A105
Date:
21 Oct 2021
Publisher:
CDS
Description:
We present a study of star formation and central black hole accretion activity of galaxies that are hosted in the two nearby (z~0.2) rich galaxy clusters Abell 983 and 1731. We aim to quantify both the obscured and unobscured star formation rates, as well as the presence of active galactic nuclei (AGN) as a function of the environment in which the galaxy is located. We targeted the clusters with unprecedented deep infrared Spitzer observations (0.2mJy @ 24-micron), near-IR Palomar imaging and optical WIYN spectroscopy. The extent of our observations (~3 virial radii) covers the vast of possible environments, from the very dense cluster centre to the very rarefied cluster outskirts and accretion regions. The star-forming members of the two clusters present star formation rates that are comparable with those measured in coeval field galaxies. Analysis of the spatial arrangement of the spectroscopically confirmed members reveals an elongated distribution for A1731 with respect to the more uniform distribution of A983. The emerging picture is compatible with A983 being a fully evolved cluster, in contrast with the still actively accreting A1731. Analysis of the specific star formation rate reveals evidence of ongoing galaxy pre-processing along A1731's filament-like structure. Furthermore, the decrease in the number of star-forming galaxies and AGN towards the cluster cores suggests that the cluster environment is accelerating the ageing process of the galaxies and blocking further accretion of the cold gas that fuels both star formation and black hole accretion activity.

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