- ID:
- ivo://CDS.VizieR/J/ApJ/674/857
- Title:
- Radial velocities and CT1 magnitudes in M60 galaxy
- Short Name:
- J/ApJ/674/857
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present radial velocity measurements for globular clusters in M60, a giant elliptical galaxy in the Virgo Cluster. Target globular cluster candidates were selected using Washington photometry based on deep 16'x16' images taken at the KPNO 4m telescope and using VI photometry derived from Hubble Space Telescope WFPC2 archival images. The spectra of the target objects were obtained with the Multi-Object Spectrograph at the Canada-France-Hawaii Telescope. We have measured the radial velocities of 111 objects in the field of M60: 93 globular clusters (72 blue globular clusters with 1.0<=C-T1<1.7, and 21 red globular clusters with 1.7<=C-T1<2.4), 11 foreground stars, six small galaxies, and the nucleus of M60.
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- ID:
- ivo://CDS.VizieR/J/ApJ/743/167
- Title:
- Radial velocities and membership in Pal 13
- Short Name:
- J/ApJ/743/167
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present Keck/DEIMOS spectroscopy and Canada-France-Hawaii Telescope/MegaCam photometry for the Milky Way globular cluster Palomar 13. We triple the number of spectroscopically confirmed members, including many repeat velocity measurements. Palomar 13 is the only known globular cluster with possible evidence for dark matter, based on a Keck/High Resolution Echelle Spectrometer 21 star velocity dispersion of {sigma}=2.2+/-0.4km/s. We reproduce this measurement, but demonstrate that it is inflated by unresolved binary stars. For our sample of 61 stars, the velocity dispersion is {sigma}=0.7^+0.6^_-0.5_km/s. Combining our DEIMOS data with literature values, our final velocity dispersion is {sigma}=0.4^+0.4^_-0.3_km/s. We determine a spectroscopic metallicity of [Fe/H]=-1.6+/-0.1 dex, placing a 1{sigma} upper limit of {sigma}_[Fe/H]_~0.2dex on any internal metallicity spread. We determine Palomar 13's total luminosity to be M_V_=-2.8+/-0.4, making it among the least luminous known globular clusters.
- ID:
- ivo://CDS.VizieR/J/MNRAS/369/783
- Title:
- Radial velocities & distances of carbon stars
- Short Name:
- J/MNRAS/369/783
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- Optical radial velocities have been measured for 38 C-type Mira variables (C-Miras). These data together with others in the literature are used to study the differences between optical and CO millimetre (mm) observations for C-Miras and the necessary corrections to the optical velocities are derived in order to obtain the true radial velocities of the variables. The difference between absorption and emission-line velocities is also examined. A particularly large difference (+30km/s) is found in the case of the H{alpha} line. A catalogue is given of 177 C-Miras with estimated distances and radial velocities. The distances are based on bolometric magnitudes derived in Paper I (Whitelock et al., 2006, Cat. <J/MNRAS/369/751>) using South African Astronomical Observatory (SAAO) observations or (for 60 of the stars) using non-SAAO photometry. In the latter case, the necessary transformations to the SAAO system are derived. These data will be used in Paper III (Feast et al., 2006MNRAS.369..791F) to study the kinematics of the C-Miras.
- ID:
- ivo://CDS.VizieR/III/144
- Title:
- Radial Velocities for High Proper Motion Stars
- Short Name:
- III/144
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- The machine-readable version of Radial Velocities of High Proper Motion Stars contains UBV photometry, proper motions, and radial (line-of-sight) velocities for 878 high-proper-motion stars that were selected from the subdwarf candidate list of Sandage and Fouts (1986).
- ID:
- ivo://CDS.VizieR/J/ApJ/757/18
- Title:
- Radial velocities for 16 hot Jupiter host stars
- Short Name:
- J/ApJ/757/18
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We provide evidence that the obliquities of stars with close-in giant planets were initially nearly random, and that the low obliquities that are often observed are a consequence of star-planet tidal interactions. The evidence is based on 14 new measurements of the Rossiter-McLaughlin effect (for the systems HAT-P-6, HAT-P-7, HAT-P-16, HAT-P-24, HAT-P-32, HAT-P-34, WASP-12, WASP-16, WASP-18, WASP-19, WASP-26, WASP-31, Gl 436, and Kepler-8), as well as a critical review of previous observations. The low-obliquity (well-aligned) systems are those for which the expected tidal timescale is short, and likewise the high-obliquity (misaligned and retrograde) systems are those for which the expected timescale is long. At face value, this finding indicates that the origin of hot Jupiters involves dynamical interactions like planet-planet interactions or the Kozai effect that tilt their orbits rather than inspiraling due to interaction with a protoplanetary disk. We discuss the status of this hypothesis and the observations that are needed for a more definitive conclusion.
- ID:
- ivo://CDS.VizieR/J/A+A/430/165
- Title:
- Radial velocities for 6691 K and M giants
- Short Name:
- J/A+A/430/165
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- The table provides Hipparcos positions, Hipparcos & Tycho-2 proper motions, and CORAVEL radial velocities for 6691 K and M giants in the solar neighbourhood, mostly from the Hipparcos survey. A bayesian maximum-likelihood approach has been used to derive the distances and space velocities. New V-I indices, computed from a color transformation based on Hp-V_T2_, are also provided. Spectroscopic binaries have been identified as well. These data may be used to study the kinematics of giant stars in the solar neighbourhood, and to correlate it with their location in the Hertzsprung-Russell diagram.
- ID:
- ivo://CDS.VizieR/J/ApJS/141/503
- Title:
- Radial Velocities for 889 late-type stars
- Short Name:
- J/ApJS/141/503
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We report radial velocities for 844 FGKM-type main sequence and subgiant stars and 45 K giants, most of which had either low-precision velocity measurements or none at all. These velocities differ from the standard stars of Udry et al. (1999IAUCo.170..354U) by 0.035km/s (RMS) for the 26 FGK standard stars in common. The zero-point of our velocities differs from that of Udry et al.: <V_present_-V_Udry_>=+0.053km/s. Thus these new velocities agree with the best known standard stars both in precision and zero-point, to well within 0.1km/s. Nonetheless, both these velocities and the standards suffer from three sources of systematic error, namely, convective blueshift, gravitational redshift, and spectral type mismatch of the reference spectrum. These systematic errors are here forced to be zero for G2V stars by using the Sun as reference, with Vesta and day sky as proxies. But for spectral types departing from solar, the systematic errors reach 0.3km/s in the F and K stars and 0.4km/s in M dwarfs. Multiple spectra were obtained for all 889 stars during four years, with the HIRES echelle spectrometer (Vogt et al., 1994, , Proc. Soc. Photo-Opt. Instr. Eng., 2198, 362) on the 10m Keck I telescope and with the "Hamilton" echelle spectrometer fed by either the 3m Shane or the 0.6m Coude Auxilliary (CAT) Telescopes (Vogt, 1987PASP...99.1214V), and 782 of them exhibit velocity scatter less than 0.1km/s. These stars may serve as radial velocity standards if they remain constant in velocity. We found 11 new spectroscopic binaries and report orbital parameters for them.
- ID:
- ivo://CDS.VizieR/J/A+A/485/303
- Title:
- Radial velocities for 1309 stars and 166 OCl
- Short Name:
- J/A+A/485/303
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present the final catalogues of a long term observing program performed with the two Coravel spectrovelocimeters for red giants in open clusters. The main aims were to detect spectroscopic binaries and determine their orbital parameters, determine the membership, and compute mean velocities for the stars and open clusters. We computed weighted mean radial velocities for 1309 stars from 10517 individual observations, including the systemic radial velocities from spectroscopic orbits and for Cepheids. The final results are contained in three catalogues collecting 10517 individual radial velocities, mean radial velocities for 1309 red giants, and mean radial velocities for 166 open clusters, among which 57 are new determinations. We identify 891 members and 418 non-members. We discovered a total of 288 spectroscopic binaries, among which 57 were classified as non-members. In addition 27 stars were judged to be variable in radial velocities, all of them being red supergiants.
- ID:
- ivo://CDS.VizieR/J/A+A/546/A61
- Title:
- Radial velocities for XHIP catalogue
- Short Name:
- J/A+A/546/A61
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- The Hundred-Thousand-Proper-Motion (HTPM) project will determine the proper motions of ~113500 stars using a ~23-year baseline. The proper motions will be based on space-based measurements exclusively, with the Hipparcos data, with epoch 1991.25, as first epoch and with the first intermediate-release Gaia astrometry, with epoch ~2014.5, as second epoch. The expected HTPM proper-motion standard errors are 30-190{mu}as/yr, depending on stellar magnitude. Depending on the astrometric characteristics of an object, in particular its distance and velocity, its radial velocity can have a significant impact on the determination of its proper motion. The impact of this perspective acceleration is largest for fast-moving, nearby stars. Our goal is to determine, for each star in the Hipparcos catalogue, the radial-velocity standard error that is required to guarantee a negligible contribution of perspective acceleration to the HTPM proper-motion precision.
- ID:
- ivo://CDS.VizieR/III/172
- Title:
- Radial Velocities from Objective Prism Plates
- Short Name:
- III/172
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- Accurate positions and radial velocities are determined from 32 objective-prism plates for two areas. Each field is observed twice with opposite dispersion, allowing adjustment of coordinates for spectra not at the plate centers. From the adjusted coordinates and plate overlap, positions are determined with average mean errors: 0.0135 s in RA and 0.177 arcsec in Dec for Area I (near the South Galactic Pole); 0.0315 s in RA, 0.144 arcsec in Dec for Area II (near the galactic plane). Observations were taken by J.D. MacConnell and G. Araya with a six degree prism on the Curtis Schmidt telescope at Cerro Tololo.