- ID:
- ivo://CDS.VizieR/J/A+A/360/472
- Title:
- Proper motions in omega Centauri
- Short Name:
- J/A+A/360/472
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- The tables present the photometric and astrometric results of an extensive proper motion study of the globular cluster omega Centauri: information on the photographic plates used, variability analysis, astrometric data for 9847 stars, membership determination and surface density profile, cluster proper motion dispersions and systematics and cross-references with star-numbers used by Norris et al. (1997ApJ...487L.187N) and Lynga (1996A&AS..115..297L).
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- ID:
- ivo://CDS.VizieR/J/AJ/134/1432
- Title:
- Proper motions in Plaut's window
- Short Name:
- J/AJ/134/1432
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- A proper-motion study of a field of 20'x20' inside Plaut's low-extinction window (l,b) = (0{deg}, -8{deg}) has been completed. Relative proper motions and photographic BV photometry have been derived for ~21000 stars reaching to V~20.5mag, based on the astrometric reduction of 43 photographic plates, spanning over 21yr of epoch difference. Proper-motion errors are typically 1mas/yr, and field-dependent systematics are below 0.2mas/yr. Cross-referencing with the 2MASS catalog yielded a sample of ~8700 stars, from which predominantly disk and bulge subsamples were selected photometrically from the JH color-magnitude diagram. The two samples exhibited different proper-motion distributions, with the disk displaying the expected reflex solar motion as a function of magnitude.
- ID:
- ivo://CDS.VizieR/I/257B
- Title:
- Proper Motions in Praesepe
- Short Name:
- I/257B
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- High-precision proper motions for 257 and 296 stars in a 90'x90' region centered on BD+20 2170 were obtained from seven plates taken with the Zo-se 40cm refractor (f=6895mm) in March, 1986 (see the "Plate Summary" section below), combined with six AC plates and the stellar positions in Russell's (1976, Ph.D. Thesis, Pittsburgh University). Combined with other data, membership probabilities were estimated by an improved maximum likelihood method. A very good sample of 198 members is obtained with proper motion accuracies ranging from +/-0.2 to +/-5.0mas/yr, of which 60% are better than +/-1.0mas/yr; the completeness limit is about B=15.5mag. Note that the table published in electronic form associated to the paper published in 1995A&AS..113..419W presented positions not correctly associated to the stars (see the "History" section below)
- ID:
- ivo://CDS.VizieR/J/MNRAS/257/257
- Title:
- Proper motions in the Hyades
- Short Name:
- J/MNRAS/257/257
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We have used COSMOS scans of photographic plates taken by the Palomar Oschin Schmidt telescope (as part of the original Palomar Sky Survey) and by the UK Schmidt telescope to obtain proper motions for ~ 450 000 stars within a 112-degree region covering part of the Hyades cluster. With epoch differences of 33 to 37 yr, we have obtained proper motions accurate to 6-12 mas/yr and have identified 393 candidate Hyads to a limiting magnitude of Mv ~ +15.5, including at least two new white dwarf candidates. The main-sequence luminosity function determined from our sample is similar to that defined by local field stars, with a broad maximum at Mv ~ +12. Deriving distances from mu u, the proper motion towards the convergent point, and the space velocity determined by Gunn et al., we find stars with motions consistent with membership at distances of more than 15pc from the cluster centre. Moreover, both the line-of-sight and surface density distributions show evidence for significant mass segregation - indeed, the overall proper motion distribution suggests a tight core centred within a much broader distribution. We derive a total mass of 410-480Sun and a gravitational binding radius of ~ 10.5pc.
- ID:
- ivo://CDS.VizieR/J/PAZh/23/90
- Title:
- Proper motions in 181 young open clusters
- Short Name:
- J/PAZh/23/90
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- Absolute proper motions have been determined for 181 young open clusters based on photometric data and radial velocities of 2980 cluster members.
- ID:
- ivo://CDS.VizieR/J/MNRAS/370/435
- Title:
- Proper motions near the Baade window
- Short Name:
- J/MNRAS/370/435
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present a proper motion mini-survey of 35 fields in the vicinity of Baade window, (l, b) = (1{deg}, 4{deg}), sampling roughly a 5x2.5deg^2^ region of the Galactic bar. Our second epoch observations collected with the Advanced Camera for Surveys/High Resolution Channel instrument onboard the Hubble Space Telescope were combined with the archival Wide Field Planetary Camera 2/PC images. The resulting time baselines are in the range of 4 to 8yr. Precise proper motions of 15863 stars were determined in the reference frame defined by the mean motion of stars with magnitudes between I_F814W_=16.5 and 21.5 along the line of sight.
- ID:
- ivo://CDS.VizieR/J/MNRAS/462/3401
- Title:
- Proper motions of blue stragglers in 38 GC
- Short Name:
- J/MNRAS/462/3401
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present new blue straggler star (BSS) catalogues in 38 Milky Way globular clusters (GCs) based on multipassband and multi-epoch treasury survey data from the Hubble Space Telescope. We measure precise astrometry and relative proper motions of stars in all target clusters and performed a subsequent cluster membership selection. We study the accuracy of our proper-motion measurements using estimates of central velocity dispersions and find very good agreement with previous studies in the literature. Finally, we present a homogeneous BSS selection method, that expands the classic BSS selection parameter space to more evolved BSS evolutionary stages. We apply this method to the proper-motion cleaned GC star catalogues in order to define proper-motion cleaned BSS catalogues in all 38 GCs, which we make publicly available to enable further study and follow-up observations.
- ID:
- ivo://CDS.VizieR/J/A+A/504/981
- Title:
- Proper motions of cool stars in Upper Sco OB
- Short Name:
- J/A+A/504/981
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- Proper motion measurements of the cool and ultracool populations in the Upper Scorpius OB association are crucial to confirm membership and to identify possible run-away objects. We cross-match samples of photometrically selected and spectroscopically confirmed cool and ultracool (K5<SpT<M8.5) candidate members in the Upper Scorpius OB association using the literature and the USNO-B (Cat. <I/284>) and the UCAC2 (Cat. <I/294>) catalogues. 251 of these objects have a USNO-B and/or UCAC2 counterpart with proper motion measurements.
- ID:
- ivo://CDS.VizieR/J/PASP/118/1639
- Title:
- Proper motions of faint UV-bright sources
- Short Name:
- J/PASP/118/1639
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- Proper motions with values >=10 or <=10mas/yr have been extracted from the USNOB1.0 and Tycho2 catalogs for all Lanning UV-bright sources identified in the Sandage Two-Color Survey of the Galactic Plane and presented in Papers I-VI (Cat. <II/257>. Of the 572 sources examined, we find at least 213 that exhibit a significantly large proper motion. Based on the location of the sources in a reduced proper motion diagram, we demonstrate that about two-thirds of the high proper motion sources are likely or very likely to be heretofore unidentified white dwarfs.
- ID:
- ivo://CDS.VizieR/J/MNRAS/407/681
- Title:
- Proper motions of FBS blue stellar objects
- Short Name:
- J/MNRAS/407/681
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- A new method for combined calculations of proper motions (PMs) based on accurate measurements of POSS1 and POSS2 epoch plates is given. The positional accuracy of various surveys and catalogues is estimated, and statistical weights for each of them are established. To achieve the best positions, weighted averaging of direct measurements on DSS1/DSS2, and data from APM, MAPS, USNO-A2.0, USNO-B1.0 and GSC 2.3.2 catalogues were used. The rms accuracy of positions achieved for POSS1 is 119mas in each coordinate and 168 mas total and for POSS2 is 69mas in each coordinate and 98mas total. Using these accurate positions and the large separation in years between POSS1 and POSS2, we have calculated the best possible proper motions: 3.9mas/yr in each coordinate and 5.5mas/yr total. We have worked out methods to control and exclude accidental errors that appear in any survey. We have compared and combined our PM with those given in USNO-B1.0, SDSS DR7, and Tycho-2 catalogs and obtained even better results: 3.0mas/yr in each coordinate and 4.2mas/yr total PM. This approach has been applied to the First Byurakan Survey blue stellar objects containing a significant number of white dwarfs and subdwarfs. Altogether 640 objects have been revealed with PM>=10mas/yr, the detection limit for this method; and an electronic table of these objects is given. For more confident proper motions, we adopt the limit 20mas/yr (333 objects). Adopting 50km/s as an upper limit for tangential velocities, we have calculated maximum distances and absolute magnitudes and estimated luminosity types for these objects and obtained 185 probable white dwarfs (M>8mag), 69 possible white dwarfs (6mag<M<8mag), and 42 candidate sd/WDs (3mag<M<6mag). Given that we have re-discovered 141 genuine white dwarfs among the classified objects, the success rate of discovery of white dwarfs is estimated as 83% and 38% for our probable and possible white dwarfs, respectively.
