- ID:
- ivo://CDS.VizieR/III/134
- Title:
- Radial Velocities of Bright Population II F Stars
- Short Name:
- III/134
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- This catalog presents new radial velocity determinations, based on 2nm/mm Coude plates, for 146 southern stars brighter than m(v)=8.3. Drawn from the catalog of uvby-{beta} photometry of southern A5-G0 stars by Olsen (1983, Cat. II/90), the program stars are certain or suspected Population II stars. One triple-lined and 10 double-lined binaries have been detected, including HD 210737, for which a preliminary orbit has been derived. Notes on spectral peculiarities are given. The catalog is in two files. The first file lists HD number, heliocentric Julian date of observation, radial velocity with error and number of lines observed for both the primary and secondary stars, rotation class, and remarks for each observation. The second file contains additional remarks to the data of the first file, sorted by HD number.
Number of results to display per page
Search Results
- ID:
- ivo://CDS.VizieR/III/127
- Title:
- Radial Velocities of Bright Southern Stars
- Short Name:
- III/127
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- Radial Velocities of Bright Southern Stars is the result of an effort to determine radial velocities for those southern stars in the "Bright Star Catalogue" with no previously published radial velocity. This version of the catalog combines three lists of data published separately during 1983-85, the first for B-type stars, the second for late-type stars, and the last for A- and F-type stars. J. Andersen notes the following in a 1987 private communication: "In order to make the 1982 edition of the 'Bright Star Catalogue' as complete as possible, preliminary or even incomplete data for many stars in this catalogue were provided in advance of publication. The present catalogue presents the final values, which should supersede (not be averaged with!) those given in the Bright Star Catalogue." The method employed throughout the entire observation program is described by Andersen & Nordstroem (1983A&A...122...23A).
- ID:
- ivo://CDS.VizieR/J/A+A/448/1001
- Title:
- Radial velocities of B stars in Sco-Cen
- Short Name:
- J/A+A/448/1001
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We derive single-epoch radial velocities for a sample of 56 B-type stars members of the subgroups Upper Scorpius, Upper Centaurus Lupus and Lower Centaurus Crux of the nearby Sco-Cen OB association. The radial velocity measurements were obtained by means of high-resolution echelle spectra via analysis of individual lines. The internal accuracy obtained in the measurements is estimated to be typically 2-3km/s, but depends on the projected rotational velocity of the target. Radial velocity measurements taken for 2-3 epochs for the targets HD120307, HD142990 and HD139365 are variable and confirm that the y are spectroscopic binaries, as previously identified in the literature. Spectral lines from two stellar components are resolved in the observed spectra of target stars HD133242, HD133955 and HD143018, identifying them as spectroscopic binaries.
- ID:
- ivo://CDS.VizieR/J/ApJ/700/1349
- Title:
- Radial velocities of Capella
- Short Name:
- J/ApJ/700/1349
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We report extensive radial velocity measurements of the two giant components of the detached, 104 day period binary system of Capella. Our highly accurate three-dimensional orbital solution based on all existing spectroscopic and astrometric observations including our own yields much improved masses for the primary and secondary of 2.466+/-0.018M_{sun}_ and 2.443+/-0.013M_{sun}_, with relative errors of only 0.7% and 0.5%, respectively. The mass ratio is considerably closer to unity than previously believed, which has an impact on assessing the evolutionary state of the system. Improved values are presented also for the radii (11.87+/-0.56R_{sun}_ and 8.75+/-0.32R_{sun}_), effective temperatures (4920+/-70K and 5680+/-70K), and luminosities (79.5+/-4.8L_{sun}_ and 72.1+/-3.6L_{sun}_). The distance is determined to be 13.042+/-0.028pc, based on the accurate orbital parallax. The projected rotational velocities and individual rotation periods are also known. Capella is unique among evolved stars in that, in addition to all of the above, the chemical composition is known as well.
- ID:
- ivo://CDS.VizieR/J/A+A/330/881
- Title:
- Radial velocities of Cartwheel Galaxy
- Short Name:
- J/A+A/330/881
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We report on high spectral and spatial resolution kinematic observations of H{alpha} emission from the Cartwheel system obtained with a scanning Fabry-Perot interferometer. Velocity fields for two galaxies were measured, for the main galaxy of the system, the Cartwheel galaxy, and for a spiral companion ~25h^-1^kpc to the north. The velocity field and the rotation curve of the spiral companion shows classical differential rotation and indicates the mass of the galaxy to be in the range 2.9-4.8x10^9^M{sun}. The Cartwheel galaxy contains strong H{alpha} in emission asymmetrically distributed along its outer ring, with some faint emission detected inside it. The velocity field and the rotation curve of the Cartwheel galaxy is clearly dominated by differential rotation although second-order effects cause distortions which can be understood in a scenario where expansion and density-wave motions are also considered. Our best model-fit to the observed velocity field of the Cartwheel galaxy includes three components for the kinematic of its outer ring: a circular velocity of 217km/s, an expansion velocity of 13-30+/-10km/s and a sinusoidal perturbation with an amplitude of 20+/-5km/s. This expansion velocity, lower than found in previous studies, implies that the ring could be older than previously thought. The rotation curve of the Cartwheel galaxy is consistent with a progenitor which had the morphology of a late-type spiral galaxy. Our measurements support the collisional models of ring galaxy formation and should impose strong constraints to simulations.
- ID:
- ivo://CDS.VizieR/J/AJ/150/170
- Title:
- Radial velocities of 7 cataclysmic binaries
- Short Name:
- J/AJ/150/170
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- From a set of 13 cataclysmic binaries that were discovered in the Swift Burst Alert Telescope (BAT) survey, we conducted time-resolved optical spectroscopy and/or time-series photometry of 11, with the goal of measuring their orbital periods and searching for spin periods. Seven of the objects in this study are new optical identifications. Orbital periods are found for seven targets, ranging from 81 minutes to 20.4hr. PBC J0706.7+0327 is an AM Herculis star (polar) based on its emission-line variations and large amplitude photometric modulation on the same period. Swift J2341.0+7645 may be a polar, although the evidence here is less secure. Coherent pulsations are detected from two objects, Swift J0503.7-2819 (975s) and Swift J0614.0+1709 (1412s and 1530s, spin and beat periods, respectively), indicating that they are probable intermediate polars (DQ Herculis stars). For two other stars, longer spin periods are tentatively suggested. We also present the discovery of a 2.00hr X-ray modulation from RX J2015.6+3711, possibly a contributor to Swift J2015.9+3715, and likely a polar.
- ID:
- ivo://CDS.VizieR/J/PASP/122/1285
- Title:
- Radial-velocities of 20 cataclysmic var.
- Short Name:
- J/PASP/122/1285
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We obtained time-series radial-velocity spectroscopy of 20 cataclysmic variable stars, with the aim of determining orbital periods P_orb_. All of the stars reported here prove to have P_orb>_3.5h. For 16 of the stars, these are the first available period determinations, and for the remaining four (V709 Cas, AF Cam, V1062 Tau, and RX J2133+51), we use new observations to improve the accuracy of previously published periods. Most of the targets are dwarf novae, without notable idiosyncrasies.
- ID:
- ivo://CDS.VizieR/J/AJ/152/226
- Title:
- Radial velocities of 35 cataclysmic variables
- Short Name:
- J/AJ/152/226
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We report follow-up studies of 35 recently discovered cataclysmic variables (CVs), 32 of which were found in large, automated synoptic sky surveys. The objects were selected for observational tractability. For 34 of the objects, we present mean spectra and spectroscopic orbital periods, and for one more we give an eclipse-based period. Thirty-two of the period determinations are new, and three of these refine published estimates based on superhump periods. The remaining three of our determinations confirm previously published periods. Twenty of the stars are confirmed or suspected dwarf novae with periods shorter than 3 hr, but we also find three apparent polars (AM Her stars) and six systems with P>5hr. Five of these systems have secondary stars visible in their spectra, from which we estimate distances when possible. The orbital period distribution of this sample is very similar to that of previously discovered CVs.
- ID:
- ivo://CDS.VizieR/J/AJ/149/128
- Title:
- Radial velocities of 29 cataclysmic variables
- Short Name:
- J/AJ/149/128
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We report follow-up spectroscopy of 29 cataclysmic variables from the Sloan Digital Sky Survey (SDSS), 22 of which were discovered by SDSS and seven of which are previously known systems that were recovered in SDSS. The periods for 16 of these objects were included in the tabulation by Gansicke et al. While most of the systems have periods less than 2hr, only one has a period in the 80-86 minutes "spike" found by Gansicke et al., and 11 have periods longer than 3hr, indicating that the present sample is skewed toward longer-period, higher-luminosity objects. Seven of the objects have spectra resembling dwarf novae, but have apparently never been observed in outburst, suggesting that many cataclysmics with relatively low variability amplitude remain to be discovered. Some of the objects are notable. SDSS J07568+0858 and SDSS J08129+1911 were previously known to have deep eclipses; in addition to spectroscopy, we use archival data from the Catalina Real Time Transient Survey to refine their periods. We give a parallax-based distance of 195(+54,-39)pc for LV Cnc (SDSS J09197+0857), which at P_orb_=81m has the shortest orbital period in our sample. SDSS J08091+3814 shows both the spectroscopic phase offset and phase-dependent absorption found in SW Sextantis stars. The average spectra of SDSS J08055+0720 and SDSS J16191+1351 show contributions from K-type secondaries, and SDSS J080440+0239 shows a contribution from an early M star. We use these to constrain the distances. SDSS J09459+2922 has characteristics typical of a magnetic system. SDSS11324+6249 may be a novalike variable, and if so, its orbital period (99 minutes) is unusually short for that subclass.
- ID:
- ivo://CDS.VizieR/III/229
- Title:
- Radial Velocities of Cepheids
- Short Name:
- III/229
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- The catalogue contains 5905 individual radial velocity values for 126 Cepheids. 1446 individual radial velocity values for 79 fields Cepheids and three Cepheids in globular clusters were made in 1987-1991, 2140 individual radial-velocity measurements were made for 86 Cepheids between 1992 and 1995, and 2444 radial-velocity measurements for 108 Cepheids were made on the 1995-1998. The observations were made with the correlation spectrometer designed by A.A. Tokovinin.
