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The RAdial Velocity Experiment (RAVE): Third Data Release
We present the third data release of the RAdial Velocity Experiment(RAVE) which is the first milestone of the RAVE project, releasing thefull pilot survey. The catalog contains 83,072 radial velocitymeasurements for 77,461 stars in the southern celestial hemisphere, aswell as stellar parameters for 39,833 stars. This paper describes thecontent of the new release, the new processing pipeline, as well as anupdated calibration for the metallicity based upon the observation ofadditional standard stars. Spectra will be made available in a futurerelease. The data release can be accessed via the RAVE Web site.
| Open Clusters as Galactic Disk Tracers. I. Project Motivation, Cluster Membership, and Bulk Three-Dimensional Kinematics
We have begun a survey of the chemical and dynamical properties of theMilky Way disk as traced by open star clusters. In this firstcontribution, the general goals of our survey are outlined and thestrengths and limitations of using star clusters as a Galactic disktracer sample are discussed. We also present medium-resolution (R ~ 15,0000) spectroscopy of open cluster stars obtained with the Hydramulti-object spectrographs on the Cerro Tololo Inter-AmericanObservatory 4 m and WIYN 3.5 m telescopes. Here we use these data todetermine the radial velocities of 3436 stars in the fields of openclusters within about 3 kpc, with specific attention to stars havingproper motions in the Tycho-2 catalog. Additional radial velocitymembers (without Tycho-2 proper motions) that can be used for futurestudies of these clusters were also identified. The radial velocities,proper motions, and the angular distance of the stars from clustercenter are used to derive cluster membership probabilities for stars ineach cluster field using a non-parametric approach, and the clustermembers so identified are used, in turn, to derive the reliable bulkthree-dimensional motion for 66 of 71 targeted open clusters. Thehigh-probability cluster members that we identify help to clarify thecolor-magnitude sequences for many of the clusters, and are primetargets for future echelle resolution spectroscopy as well asastrometric study with the Space Interferometry Mission (SIMPlanetquest).
| Absolute proper motions of open clusters. I. Observational data
Mean proper motions and parallaxes of 205 open clusters were determinedfrom their member stars found in the Hipparcos Catalogue. 360 clusterswere searched for possible members, excluding nearby clusters withdistances D < 200 pc. Members were selected using ground basedinformation (photometry, radial velocity, proper motion, distance fromthe cluster centre) and information provided by Hipparcos (propermotion, parallax). Altogether 630 certain and 100 possible members werefound. A comparison of the Hipparcos parallaxes with photometricdistances of open clusters shows good agreement. The Hipparcos dataconfirm or reject the membership of several Cepheids in the studiedclusters. Tables 1 and 2 are only available in electronic form at theCDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or viahttp://cdsweb.u-strasbg.fr/Abstract.html
| Photoelectric Search for Peculiar Stars in Open Clusters - Part Fourteen - NGC1901 NGC2169 NGC2343 CR:132 NGC2423 and NGC2447
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1993A&AS..102....1M&db_key=AST
| NGC 2423 and the red giants of the Hyades supercluster
An extensive set of photometric data for members of the cluster NGC 2423is examined, and the results are compared with those for red giantmembers of the Hyades supercluster. Intermediate band and RI or H-betaobservations for 34 stars of the cluster are listed, and photometricparameters for A and F stars in the cluster are shown. Parameters arealso depicted for red giants in the Hyades supercluster, red giants ofHyades abundance, and M type variables in the Hyades supercluster. Theintrinsic (b-y), M(1) and (R-I),(b-y) relations for normal giants withHyades metal abundance are presented. NGC 2423 is shown to be verysimilar to the Hyades with red giants that match the luminosity andtemperature distribution of those in the Hyades. The red giants of theHyades which are within about 200 pc of the sun are found to haveparallel (U,V) motions with the main sequence stars of the Hyadesnuclear cluster.
| Intermediated-band photometry of late-type stars. IX - Two Hyades-like clusters
Observations of NGC 2423 and 2482 are discussed. NGC 2423 has a dozenearly G-type to late K-type giants. Although the reddest and brightestgiant needs confirmation of cluster membership, the remaining stars showa color-luminosity distribution very similar to that found previouslyfor the Hyades group giants, and a chemical homogeneity with the Hyadesgroup giants. A preliminary (Mv, C1)-calibration is briefly discussed.NGC 2482, which may contain the cataclysmic variable BX Pup, is slightlyyounger than the Hyades and NGC 2323, but the metal abundance issimilar.
| Three-colour photometry of southern galactic clusters I,
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Membro dei seguenti gruppi:
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Osservazione e dati astrometrici
| Costellazione: | Poppa |
| Ascensione retta: | 07h37m13.53s |
| Declinazione: | -13°52'31.3" |
| Magnitudine apparente: | 11.099 |
| Moto proprio RA: | 1.7 |
| Moto proprio Dec: | 0.3 |
| B-T magnitude: | 11.347 |
| V-T magnitude: | 11.12 |
Cataloghi e designazioni:
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INHABITED SKY
