- ID:
- ivo://CDS.VizieR/J/AJ/124/1190
- Title:
- Northern high proper motion stars in DSS
- Short Name:
- J/AJ/124/1190
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We have conducted a systematic search for high proper motion stars in the Digitized Sky Survey, in the area of the sky north of -2.8 degrees in declination and within 25 degrees of the Galactic plane. Using the SUPERBLINK software, a powerful automated blink comparator developed by us, we have identified 601 stars in the magnitude range 9<r<20 with proper motions in the range 0.5"/yr<{mu}<2.0"/yr which have not been observed with the Hipparcos satellite. Among those, we recovered 460 stars previously listed in Luyten's proper motion catalogs (LHS <I/87>, NLTT <I/98>) and discovered 141 new high proper motion stars, ranging in magnitude from R=13.0 to R=19.8. Only nine stars from the Luyten catalogs that were not observed by Hipparcos could not be recovered with SUPERBLINK: three had proper motions larger than the search limit of the code ({mu}>2.0"/yr), and five were missed because they were either too bright for SUPERBLINK to handle or they are in the immediate proximity of very bright stars. Only one of Luyten's stars (LHS 1657) could not be recovered at all, even by visual inspection of the POSS plates, and is now suspected to be bogus. The very high success rate in the recovery by SUPERBLINK of faint Luyten stars suggests that our new survey of high proper motion stars is at least 99% complete for stars with proper motions 0.5"/yr<{mu}<2.0"/yr down to R=19. This paper includes a list of positions, proper motions, magnitudes, and finder charts for all the new high proper motion stars.
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Search Results
- ID:
- ivo://CDS.VizieR/I/293
- Title:
- NPM2 Cross-Identifications
- Short Name:
- I/293
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- The Lick NPM2 Catalog provides absolute proper motions, positions, and photographic photometry, measured in the Lick Northern Proper Motion (NPM) program, for 232,062 stars in the magnitude range 8<B<18, covering the sky within the Milky Way north of -23deg declination. The NPM2 Cross-Identifications file provides 46,887 cross-identifications between the NPM2 Catalog numbers and star names, stellar type classifications, and publication references. These additional data, extracted from Klemola's Lick Input Catalog of Special Stars (ICSS), facilitate many practical uses of the NPM2 Catalog. Five Appendices to the NPM2 Catalog provide references, footnotes, and other useful information. This "ReadMe" file explains the file formats. Detailed documentation is given in the file "npm2cros.txt".
- ID:
- ivo://CDS.VizieR/J/AJ/159/199
- Title:
- OCCAM. IV. Open cluster abundances using APOGEE DR16
- Short Name:
- J/AJ/159/199
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- The Open Cluster Chemical Abundances and Mapping (OCCAM) survey aims to constrain key Galactic dynamical and chemical evolution parameters by the construction of a large, comprehensive, uniform, infrared-based spectroscopic data set of hundreds of open clusters. This fourth contribution from the OCCAM survey presents analysis using Sloan Digital Sky Survey/APOGEE DR16 of a sample of 128 open clusters, 71 of which we designate to be "high quality" based on the appearance of their color-magnitude diagram. We find the APOGEE DR16 derived [Fe/H] abundances to be in good agreement with previous high-resolution spectroscopic open cluster abundance studies. Using the high-quality sample, we measure Galactic abundance gradients in 16 elements, and find evolution of some of the [X/Fe] gradients as a function of age. We find an overall Galactic [Fe/H] versus Rgc gradient of -0.068{+-}0.001dex/kpc over the range of 6<Rgc<13.9kpc; however, we note that this result is sensitive to the distance catalog used, varying as much as 15%. We formally derive the location of a break in the [Fe/H] abundance gradient as a free parameter in the gradient fit for the first time. We also measure significant Galactic gradients in O, Mg, S, Ca, Mn, Cr, Cu, Na, Al, and K, some of which are measured for the first time. Our large sample allows us to examine four well-populated age bins in order to explore the time evolution of gradients for a large number of elements and comment on possible implications for Galactic chemical evolution and radial migration.
- ID:
- ivo://CDS.VizieR/J/AcA/52/143
- Title:
- OGLE high proper motion stars towards MC
- Short Name:
- J/AcA/52/143
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present a catalog of high proper motion (HPM) stars detected in the foreground of central parts of the Magellanic Clouds. The Catalog contains 2161 objects in the 4.5 square degree area towards the LMC, and 892 HPM stars in the 2.4 square degree area towards the SMC. The Catalog is based on observations collected during four years of the OGLE-II microlensing survey. The Difference Image Analysis (DIA) of the images provided candidate HPM stars with proper motion as small as 4mas/yr. These appeared as pseudo-variables, and were all measured astrometrically on all CCD images, providing typically about 400 data points per star. The reference frame was defined by the majority of background stars, most of them members of the Magellanic Clouds. The reflex motion due to solar velocity with respect to the local standards of rest is clearly seen. The largest proper motion in our sample is 363mas/yr. Parallaxes were measured with errors smaller than 20% for several stars.
- ID:
- ivo://CDS.VizieR/J/MNRAS/348/1439
- Title:
- OGLE II Galactic center proper motions
- Short Name:
- J/MNRAS/348/1439
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present a proper-motion catalogue of 5080236 stars in 49 Optical Gravitational Lensing Experiment II (OGLE-II) Galactic bulge (GB) fields, covering a range of -11{deg}<l<11{deg} and -6{deg}<b<3{deg}, the total area close to 11deg^2^. The proper-motion measurements are based on 138-555 I-band images taken during four observing seasons: 1997-2000. The catalogue stars are in the magnitude range 11<I<18mag. In particular, the catalogue includes red clump giants and red giants in the GB, and main-sequence stars in the Galactic disc. The proper motions up to pm=500mas/yr were measured with a mean accuracy of 0.8-3.5mas/yr, depending on the brightness of a star. This catalogue may be useful for studying the kinematics of stars in the GB and the Galactic disc.
- ID:
- ivo://CDS.VizieR/J/MNRAS/385/905
- Title:
- OGLEII high pm stars towards Galactic Centre
- Short Name:
- J/MNRAS/385/905
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- The photometry data base of the second phase of the OGLE microlensing experiment, OGLE-II, is a rich source of information about the kinematics and structure of the Galaxy. In this work, we use the OGLE-II proper motion catalogue to identify candidate stars which have high proper motions. 521 stars with proper motion {mu}>50mas/yr in the OGLE-II proper motion catalogue were cross-identified with stars in the MACHO high proper motion catalogue, and the DEep Near-Infrared Survey and Two-Micron All-Sky Survey infrared photometry catalogues. Photometric distances were computed for stars with colours consistent with G/K- and M-type stars. Six stars were newly identified as possible nearby (<50pc) M dwarfs.
- ID:
- ivo://CDS.VizieR/J/MNRAS/327/601
- Title:
- OGLE-II High proper motion stars
- Short Name:
- J/MNRAS/327/601
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- The difference image analysis (DIA) of the images obtained by the Optical Gravitational Lensing Experiment (OGLE-II) revealed a peculiar artefact in the sample of stars proposed as variable by Woniak in one of the Galactic bulge fields: the occurrence of pairs of candidate variables showing anti-correlated light curves monotonic over a period of 3 yr. This effect can be understood, quantified and related to the stellar proper motions. DIA photometry supplemented with a simple model offers an effective and easy way to detect high proper motion stars in very dense stellar fields, where conventional astrometric searches are extremely inefficient.
- ID:
- ivo://CDS.VizieR/II/322
- Title:
- OGLE-III. Magellanic Clouds stellar proper motions
- Short Name:
- II/322
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present a catalog of over 6.2million stars with measured proper motions. All these stars are observed in the direction of the Magellanic Clouds within the brightness range 12<I<19mag. Based on these proper motions about 440000 Galactic foreground stars can be selected. Because the proper motions are based on a few hundred epochs collected during eight years, their statistical uncertainties are below 0.5mas/yr for stars brighter than I=18.5mag. The parallaxes are derived with uncertainties down to 1.6mas. For above 13000 objects parallaxes are derived with significance above 3{sigma}, which allows selecting about 270 white dwarfs (WDs). The search for common proper motion binaries among stars presented was performed resulting in over 500 candidate systems. The most interesting ones are candidate halo main sequence star-WD and WD-WD systems. The application of the catalog to the empirically bound Cepheid instability strip is also discussed.
- ID:
- ivo://CDS.VizieR/J/AcA/61/199
- Title:
- OGLE3 Magellanic Clouds High proper motion stars
- Short Name:
- J/AcA/61/199
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present the results of a search for High Proper Motion (HPM) stars, i.e., the ones with pm>100mas/yr, in the direction to the Magellanic Clouds. This sky area was not examined in detail as the high stellar density hampers efforts in performing high-quality astrometry.
- ID:
- ivo://CDS.VizieR/J/MNRAS/495/2882
- Title:
- Open cluster radii from Gaia proper motions
- Short Name:
- J/MNRAS/495/2882
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- In this work, we improve a previously published method to calculate in a reliable way the radius of an open cluster (OC). The method is based on the behaviour of stars in the proper motion space as the sampling changes in the position space. Here, we describe the new version of the method and show its performance and robustness. Additionally, we apply it to a large number of OCs using data from Gaia second data release to generate a catalogue of 401 clusters with reliable radius estimations. The range of obtained apparent radii goes from Rc=1.4+/-0.1arcmin (for the cluster FSR 1651) to Rc=25.5+/-3.5arcmin (for NGC 2437). Cluster linear sizes follow very closely a lognormal distribution with a mean characteristic radius of Rc=3.7pc, and its high radius tail can be fitted by a power law as N{prop.to}Rc^-3.11+/-0.35^. Additionally, we find that number of members, cluster radius, and age follow the relationship Nc{prop.to}Rc^1.2+/-0.1^.Tc^-1.9+/-0.4^ where the younger and more extensive the cluster, the more members it presents. The proposed method is not sensitive to low density or irregular spatial distributions of stars and, therefore, is a good alternative or complementary procedure to calculate OC radii not having previous information on star memberships.
