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24481. Washington Double Star Catalog
ID:
ivo://nasa.heasarc/wds
Title:
Washington Double Star Catalog
Short Name:
WDS
Date:
14 Feb 2025
Publisher:
NASA/GSFC HEASARC
Description:
The Washington Double Star Catalog (WDS), maintained by the United States Naval Observatory (USNO), is the world'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 <a href="https://crf.usno.navy.mil/wds/">https://crf.usno.navy.mil/wds/</a> (and mirrored at <a href="http://www.astro.gsu.edu/wds/">http://www.astro.gsu.edu/wds/</a>), 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 & 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 & 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 <a href="https://crf.usno.navy.mil/wds/">https://crf.usno.navy.mil/wds/</a> or <a href="http://www.astro.gsu.edu/wds/">http://www.astro.gsu.edu/wds/</a>), 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 .
24482. 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.
24483. 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.
24484. 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.
24485. 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.
24486. WASP-94A light curves
ID:
ivo://CDS.VizieR/J/MNRAS/510/4857
Title:
WASP-94A light curves
Short Name:
J/MNRAS/510/4857
Date:
23 Feb 2022 05:52:08
Publisher:
CDS
Description:
We present an optical transmission spectrum for WASP-94A b, the first atmospheric characterization of this highly-inflated hot Jupiter. The planet has a reported radius of 1.72^+0.06^_-0.05_R_Jup_, a mass of only 0.456^+0.032^_-0.036_M_Jup_, and an equilibrium temperature of 1508+/-75K. We observed the planet transit spectroscopically with the EFOSC2 instrument on the ESO New Technology Telescope (NTT) at La Silla, Chile: the first use of NTT/EFOSC2 for transmission spectroscopy. We achieved an average transit-depth precision of 128ppm for bin widths of ~200{AA}. This high precision was achieved in part by linking Gaussian Process hyperparameters across all wavelength bins. The resulting transmission spectrum, spanning a wavelength range of 3800-7140{AA}, exhibits a sodium absorption with a significance of 4.9{sigma}, suggesting a relatively cloud-free atmosphere. The sodium signal may be broadened, with a best-fitting width of 78^+67^_-32_{AA} in contrast to the instrumental resolution of 27.2+/-0.2{AA}. We also detect a steep slope in the blue end of the transmission spectrum, indicating the presence of Rayleigh scattering in the atmosphere of WASP-94A b. Retrieval models show evidence for the observed slope to be super-Rayleigh and potential causes are discussed. Finally, we find narrow absorption cores in the CaII H&K lines of WASP-94A, suggesting the star is enshrouded in gas escaping the hot Jupiter.
24487. WASP-30 and J1219-39 light & velocity curves
ID:
ivo://CDS.VizieR/J/A+A/549/A18
Title:
WASP-30 and J1219-39 light & velocity curves
Short Name:
J/A+A/549/A18
Date:
21 Oct 2021
Publisher:
CDS
Description:
This paper introduces a series of papers aiming to study the dozens of low mass eclipsing binaries (EBLM), with F, G, K primaries, that have been discovered in the course of the WASP survey. Our objects are mostly single-line binaries whose eclipses have been detected by WASP and were initially followed up as potential planetary transit candidates. These have bright primaries, which facilitates spectroscopic observations during transit and allows the study of the spin-orbit distribution of F, G, K+M eclipsing binaries through the Rossiter-McLaughlin effect.
24488. WASP and KELT planet transits
ID:
ivo://CDS.VizieR/J/AcA/68/371
Title:
WASP and KELT planet transits
Short Name:
J/AcA/68/371
Date:
21 Oct 2021
Publisher:
CDS
Description:
Theoretical calculations and some indirect observations show that massive exoplanets on tight orbits must decay due to tidal dissipation within their host stars. This orbital evolution could be observationally accessible through precise transit timing over a course of decades. The rate of planetary in-spiraling may not only help us to understand some aspects of evolution of planetary systems, but also can be used as a probe of the stellar internal structure. In this paper we present results of transit timing campaigns organized for a carefully selected sample of the Northern hemisphere hot Jupiter-like planets which were found to be the best candidates for detecting planet-star tidal interactions. Among them, there is the WASP-12 system which is the best candidate for possessing an in-falling giant exoplanet. Our new observations support the scenario of orbital decay of WASP-12 b and allow us to refine its rate. The derived tidal quality parameter of the host star Q'*=(1.82+/-0.32)x10^5^ is in agreement with theoretical predictions for subgiant stars. For the remaining systems - HAT-P-23, KELT-1, KELT-16, WASP-33, and WASP-103 - our transit timing data reveal no deviations from the constant-period models, hence constraints on the individual rates of orbital decay were placed. The tidal quality parameters of host stars in at least four systems - HAT-P-23, KELT-1, WASP-33, and WASP-103 - were found to be greater than the value reported for WASP-12. This is in line with the finding that those hosts are main sequence stars, for which efficiency of tidal dissipation is predicted to be relatively weak.
24489. WASP 127, 136 and 138 RV and light curves
ID:
ivo://CDS.VizieR/J/A+A/599/A3
Title:
WASP 127, 136 and 138 RV and light curves
Short Name:
J/A+A/599/A3
Date:
21 Oct 2021
Publisher:
CDS
Description:
We report three newly discovered exoplanets from the SuperWASP survey. WASP-127b is a heavily inflated super-Neptune of mass 0.18+/-0.02 M_J_ and radius 1.37+/-0.04 R_J_. This is one of the least massive planets discovered by the WASP project. It orbits a bright host star (Vmag=10.16) of spectral type G5 with a period of 4.17 days. WASP-127b is a low-density planet that has an extended atmosphere with a scale height of 2500+/-400km, making it an ideal candidate for transmission spectroscopy. WASP-136b and WASP-138b are both hot Jupiters with mass and radii of 1.51+/-0.08M_J_ and 1.38+/-0.16R_J_, and 1.22+/-0.08M_J_ and 1.09+/-0.05R_J_, respectively. WASP-136b is in a 5.22-day orbit around an F9 subgiant star with a mass of 1.41+/-0.07M_{sun}_ and a radius of 2.21+/-0.22R_{sun}_. The discovery of WASP-136b could help constrain the characteristics of the giant planet population around evolved stars. WASP-138b orbits an F7 star with a period of 3.63 days. Its radius agrees with theoretical values from standard models, suggesting the presence of a heavy element core with a mass of ~10M_{earth}_. The discovery of these new planets helps in exploring the diverse compositional range of short-period planets, and will aid our understanding of the physical characteristics of both gas giants and low-density planets.
24490. WASP-15 and WASP-16 light curves
ID:
ivo://CDS.VizieR/J/MNRAS/434/1300
Title:
WASP-15 and WASP-16 light curves
Short Name:
J/MNRAS/434/1300
Date:
21 Oct 2021
Publisher:
CDS
Description:
We present new photometric observations of WASP-15 and WASP-16, two transiting extrasolar planetary systems with measured orbital obliquities but without photometric follow-up since their discovery papers. Our new data for WASP-15 comprise observations of one transit simultaneously in four optical passbands using GROND on the MPG/European Southern Observatory (ESO) 2.2m telescope, plus coverage of half a transit from DFOSC on the Danish 1.54m telescope, both at ESO La Silla. For WASP-16 we present observations of four complete transits, all from the Danish telescope. We use these new data to refine the measured physical properties and orbital ephemerides of the two systems. Whilst our results are close to the originally determined values for WASP-15, we find that the star and planet in the WASP-16 system are both larger and less massive than previously thought.

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