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24121. Warps in southern hemisphere galaxies
ID:
ivo://CDS.VizieR/J/A+A/399/457
Title:
Warps in southern hemisphere galaxies
Short Name:
J/A+A/399/457
Date:
21 Oct 2021
Publisher:
CDS
Description:
A catalog of optical warps of galaxies is presented. This can be considered complementary to that reported by Sanchez-Saavedra et al. (1990MNRAS.246..458S), with 42 galaxies in the northern hemisphere, and to that by Reshetnikov & Combes (1999A&AS..138..101R), with 60 optical warps. The limits of the present catalog are: logr_25_>0.60, B_1_<14.5, DE(2000)<0{deg}, -2.5<t.7. Therefore, lenticular galaxies have also been considered. This catalog lists 150 warped galaxies out of a sample of 276 edge-on galaxies and covers the whole southern hemisphere, except the Avoidance Zone. It is therefore very suitable for statistical studies of warps. It also provides a source guide for detailed particular observations. We confirm the large frequency of warped spirals: nearly all galaxies are warped. The frequency and warp angle do not present important differences for the different types of spirals. However, no lenticular warped galaxy has been found within the specified limits. This finding constitutes an important restriction for theoretical models.
24122. Warps of galaxies
ID:
ivo://CDS.VizieR/J/A+A/391/519
Title:
Warps of galaxies
Short Name:
J/A+A/391/519
Date:
21 Oct 2021
Publisher:
CDS
Description:
From a comparison of the different parameters of warped galaxies in the radio, and especially in the visible, we find that: a) No large galaxy (large mass or radius) has been found to have high amplitude in the warp, and there is no correlation of size/mass with the degree of asymmetry of the warp. b) The disc density and the ratio of dark to luminous mass show an opposing trend: smaller values give more asymmetric warps in the inner radii (optical warps) but show no correlation with the amplitude of the warp; however, in the external radii is there no correlation with asymmetry. c) A third anticorrelation appears in a comparison of the amplitude and degree of asymmetry in the warped galaxies. Hence, it seems that very massive dark matter haloes have nothing to do with the formation of warps but only with the degree of symmetry in the inner radii, and are unrelated to the warp shape for the outermost radii. Denser discs show the same dependence.
24123. WARPS survey. VI.
ID:
ivo://CDS.VizieR/J/ApJS/140/265
Title:
WARPS survey. VI.
Short Name:
J/ApJS/140/265
Date:
21 Oct 2021
Publisher:
CDS
Description:
We present in catalog form the optical identifications for objects from the first phase of the Wide Angle ROSAT Pointed Survey (WARPS). WARPS is a serendipitous survey of relatively deep, pointed ROSAT observations for clusters of galaxies. The X-ray source detection algorithm used by WARPS is Voronoi Tessellation and Percolation (VTP), a technique which is equally sensitive to point sources and extended sources of low surface brightness. WARPS-I is based on the central regions of 86 ROSAT PSPC fields, covering an area of 16.2 square degrees. We describe here the X-ray source screening and optical identification process for WARPS-I, which yielded 34 clusters at 0.06<z<0.75. Twenty-two of these clusters form a complete, statistically well-defined sample drawn from 75 of these 86 fields, covering an area of 14.1 square degrees, with a flux limit of F(0.5x2.0keV)=6.5x10^-14^erg/cm^2^/s. This sample can be used to study the properties and evolution of the gas, galaxy and dark matter content of clusters and to constrain cosmological parameters. We compare in detail the identification process and findings of WARPS to those from other recently published X-ray surveys for clusters, including RDCS, SHARC-Bright, SHARC-south, and the CfA 160deg^2^ survey.
24124. Warsaw Catalogue of cometary orbits
ID:
ivo://CDS.VizieR/J/A+A/567/A126
Title:
Warsaw Catalogue of cometary orbits
Short Name:
J/A+A/567/A126
Date:
21 Oct 2021
Publisher:
CDS
Description:
The dynamical evolution of near-parabolic comets strongly depends on the starting values of the orbital elements derived from the positional observations. In addition, when drawing conclusions about the origin of these objects, it is crucial to control the uncertainties of orbital elements at each stage of the dynamical evolution. I apply a completely homogeneous approach to determine the cometary orbits and their uncertainties. The resulting catalogue is suitable for the investigation of the origin and future of near-parabolic comets. First, osculating orbits were determined on the basis of positional data. Second, the dynamical calculations were performed backwards and forwards up to 250AU from the Sun to derive original and future barycentric orbits for each comet. In the present investigation of dynamical evolution, the numerical calculations for a given object start from the swarm of virtual comets constructed using the previously determined osculating (nominal) orbit. In this way, the uncertainties of orbital elements were derived at the end of numerical calculations.
24125. WASHINGTON 20 Catalog
ID:
ivo://CDS.VizieR/I/40
Title:
WASHINGTON 20 Catalog
Short Name:
I/40
Date:
21 Oct 2021
Publisher:
CDS
Description:
This catalogue contains the two parts: the 9989 first stars are the standard and intermediary stars, +90 to -36 degrees of declination, observed in the years 1913 to 1926, and reduced without proper motion to the equinox 1920.0 ; the second part (stars numbered 9990 to 10571) are 582 miscellaneous stars.
24126. Washington Double Star Catalog
ID:
ivo://nasa.heasarc/wds
Title:
Washington Double Star Catalog
Short Name:
WDS
Date:
21 Feb 2025
Publisher:
NASA/GSFC HEASARC
Description:
The Washington Double Star Catalog (WDS), maintained by the United States Naval Observatory (USNO), is the world&#39;s principal database of astrometric double and multiple star information. The WDS Catalog contains positions, discoverer designations, epochs, position angles, separations, magnitudes, spectral types, proper motions and when available, Durchmusterung numbers and notes for the components of close to 100,000 systems based on ~600,000 means. The current version at the HEASARC is updated weekly and is derived from the version available online at &lt;a href="https://crf.usno.navy.mil/wds/"&gt;https://crf.usno.navy.mil/wds/&lt;/a&gt; (and mirrored at &lt;a href="http://www.astro.gsu.edu/wds/"&gt;http://www.astro.gsu.edu/wds/&lt;/a&gt;), the latter being potentially updated nightly. The Washington Visual Double Star Catalog (WDS) is the successor to the Index Catalogue of Visual Double Stars, 1961.0 (IDS; Jeffers &amp; van den Bos, 1963). Three earlier double star catalogs in the 20th century, those by Burnham (BDS; 1906), Innes (SDS; 1927), and Aitken (ADS; 1932), each covered only a portion of the sky. Both the IDS and the WDS cover the entire sky, and the WDS is intended to contain all known visual double stars for which at least one differential measure has been published. The WDS is continually updated as published data become available. Prior to this, two major updates have been published (Worley &amp; Douglass 1984, 1997). The Washington Double Star Catalog (WDS) has seen numerous changes since the last major release of the catalog. The application of many techniques and considerable industry over the past few years has yielded unprecedented gains in both the number of systems and the number of measures. This version of the WDS catalog was first created at the HEASARC in March 2002 based on the USNO online version (available at either &lt;a href="https://crf.usno.navy.mil/wds/"&gt;https://crf.usno.navy.mil/wds/&lt;/a&gt; or &lt;a href="http://www.astro.gsu.edu/wds/"&gt;http://www.astro.gsu.edu/wds/&lt;/a&gt;), and is updated by the HEASARC on at least a weekly basis. The table schema was last revised in February 2005. This is a service provided by NASA HEASARC .
24127. Washington Photometry in NGC 5128
ID:
ivo://CDS.VizieR/J/AJ/128/712
Title:
Washington Photometry in NGC 5128
Short Name:
J/AJ/128/712
Date:
21 Oct 2021
Publisher:
CDS
Description:
To investigate the global properties of the globular cluster system (GCS) around NGC 5128, the central giant elliptical galaxy in the nearby Centaurus group, we have obtained deep CCD imaging for an area of almost 2{deg}^2^ centered on the galaxy. Our data, in the CMT_1_ Washington photometric system, reach an approximate limiting magnitude of T_1_~R~22 and contain magnitudes, colors, and coordinates for more than 100,000 objects. Of these, the vast majority (about 99%) are either foreground stars or faint background galaxies; the old-halo globular clusters make up the remaining tiny fraction of the sample. Our database, however, provides the material for understanding the large-scale features of the GCS, including its metallicity distribution (MDF), luminosity distribution, and spatial structure.
24128. Washington Photometry in NGC 5128. II
ID:
ivo://CDS.VizieR/J/AJ/128/723
Title:
Washington Photometry in NGC 5128. II
Short Name:
J/AJ/128/723
Date:
21 Oct 2021
Publisher:
CDS
Description:
Building on the CMT_1_ photometric database presented in Paper I (Cat. <J/AJ/128/712>), in this paper we derive the large-scale properties of the globular cluster system (GCS) in NGC 5128, the nearest giant elliptical and the dominant galaxy in the Centaurus group. Using the metallicity-sensitive C-T_1_ color index, we discuss the metallicity distribution function (MDF) for a subsample of 211 previously identified clusters, all on a homogeneous photometric system. We find the MDF to be strongly bimodal, with metallicity peaks at [Fe/H]=-1.55 and -0.55 and with nearly equal numbers of clusters in each of the metal-poor and metal-rich modes. Finally, we present a list of 327 new cluster candidates not identified in any previous surveys; most of these are in the less well studied bulge region of the galaxy and along the minor axis.
24129. Washington photometry of Bootes I stars
ID:
ivo://CDS.VizieR/J/AJ/136/2321
Title:
Washington photometry of Bootes I stars
Short Name:
J/AJ/136/2321
Date:
21 Oct 2021
Publisher:
CDS
Description:
We present Washington CT_1_T_2_ photometry of a field central to the Bootes I dwarf spheroidal galaxy, which was discovered as a stellar overdensity in the Sloan Digital Sky Survey (DR5). We show that the Washington filters are much more effective than the Sloan filters in separating the metal-poor turn-off stars in the dwarf galaxy from the foreground stars. We detect 165 objects in the field, and statistically determine that just over 40% of the objects are nonmembers. Our statistical analysis mostly agrees with radial velocity measurements of the brighter stars. We find that there is a distinct main-sequence turn-off and subgiant branch, where there is some evidence of a spread in chemical abundance.
24130. WASP-94AB photometry and radial velocities
ID:
ivo://CDS.VizieR/J/A+A/572/A49
Title:
WASP-94AB photometry and radial velocities
Short Name:
J/A+A/572/A49
Date:
21 Oct 2021
Publisher:
CDS
Description:
We report the discovery of two hot-Jupiter planets, one orbiting each star of a wide binary system. WASP-94A (2MASS 20550794-3408079) is an F8 type star hosting a transiting planet with a radius of 1.72+/-0.06R_Jup_, a mass of 0.445+/ 0.026M_Jup_ and an orbital period of 3.95 days. The Rossiter-McLaughlin effect is clearly detected and the measured projected spin-orbit angle indicates that the planet occupies a retrograde orbit. WASP-94B (2MASS 20550915-3408078) is an F9 stellar companion at an angular separation of 15" (projected separation 2700AU), hosting a gas giant of minimum mass 0.617+/-0.028M_Jup_ with a period of 2.008-days, detected by Doppler measurements. The orbital planes of the two planets are inclined relative to each other, indicating that at least one of them is inclined relative to the plane of the stellar binary. These hot Jupiters in a binary system bring new insights into the formation of close-in giant planets and the role of stellar multiplicity.

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