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Related papers: A proper motion study of the globular cluster M55

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We present a catalogue of astrophysical data of 520 Galactic open clusters. These are the clusters, for which at least three most probable members (18 on average) could be identified in the ASCC-2.5, a catalogue of stars based on the…

Astrophysics · Physics 2016-08-16 N. V. Kharchenko , A. E. Piskunov , S. Röser , E. Schilbach , R. -D. Scholz

We constructed a Hubble Space Telescope (HST) astro-photometric catalog of the central region of the Galactic globular cluster NGC 1261. This catalog, complemented with Gaia DR2 data sampling the external regions, has been used to estimate…

Solar and Stellar Astrophysics · Physics 2020-05-27 S. Raso , M. Libralato , A. Bellini , F. R. Ferraro , B. Lanzoni , M. Cadelano , C. Pallanca , E. Dalessandro , G. Piotto , J. Anderson , S. T. Sohn

We present a homogeneous catalogue for blue straggler, red giant branch, horizontal branch and main-sequence turn-off stars in a sample of 35 clusters taken from the ACS Survey for Globular Clusters. As a result of the superior photometry…

Solar and Stellar Astrophysics · Physics 2015-05-28 Nathan Leigh , Alison Sills , Christian Knigge

We present a study of the kinematics of the remote globular cluster NGC5694 based on GIRAFFE@VLT medium resolution spectra. A sample of 165 individual stars selected to lie on the Red Giant Branch in the cluster Color Magnitude Diagram was…

Solar and Stellar Astrophysics · Physics 2015-06-23 M. Bellazzini , A. Mucciarelli , A. Sollima , M. Catelan , E. Dalessandro , M. Correnti , V. D'Orazi , C. Cortes , P. Amigo

The results of astrometric and photometric investigations of the poorly studied open cluster NGC 1513 are presented. The proper motions of 353 stars with the root-mean-square error of 1.9 mas/yr were obtained by means of the automated…

Omega Centauri is the most well studied Globular Cluster because of its numerous puzzling features. Intensive spectroscopic follow-up observing campaigns targeting stars at different positions on the color-magnitude diagram promises to…

We present the first part of the first large and homogeneous CCD color-magnitude diagram (CMD) data base, comprising 52 nearby Galactic globular clusters (GGC) imaged in the V and I bands using only two telescopes (one for each hemisphere).…

Astrophysics · Physics 2015-06-24 A. Rosenberg , G. Piotto , I. Saviane , A. Aparicio

Deep imaging data from the Keck II telescope are employed to study the globular cluster (GC) populations in the cores of six rich Abell clusters. The sample includes A754, A1644, A2124, A2147, A2151, and A2152, and spans the redshift range…

Astrophysics · Physics 2009-10-31 John P. Blakeslee

We have determined the proper motion (PM) of the Large Magellanic Cloud (LMC) relative to four background quasi-stellar objects, combining data from two previous studies made by our group, and new observations carried out in four epochs not…

Astrophysics · Physics 2008-11-26 Mario H. Pedreros , Edgardo Costa , Rene A. Mendez

We present a study on stellar population and kinematics of globular clusters (GCs) in the peculiar galaxy M85. We obtain optical spectra of 89 GCs at 8 kpc $< R <$ 160 kpc using the MMT/Hectospec. We divide them into three groups,…

Astrophysics of Galaxies · Physics 2020-11-18 Youkyung Ko , Myung Gyoon Lee , Hong Soo Park , Jubee Sohn , Sungsoon Lim , Narae Hwang , Byeong-Gon Park

We present F555W (V), F439W (B), and F336W (U) photometry of 9507 stars in the central 2' of the dense, post core collapse cluster M30 (NGC 7099) derived from HST WFPC2 images. These data are used to study the mix of stellar populations in…

We have measured the absolute proper motions of globular clusters NGC 2808, 3201, 4372, 4833, 5927 and 5986. The proper motions are on the Hipparcos system and they are the first determinations ever made for these low Galactic latitude…

We analyse 20 nights of CCD observations in the V and I bands of the globular cluster M68 (NGC 4590), using these to detect variable objects. We also obtained electron-multiplying CCD (EMCCD) observations for this cluster in order to…

Although they are the main constituents of the Galactic disk population, for half of the open clusters in the Milky Way reported in the literature nothing is known except the raw position and an approximate size. The main goal of this study…

Astrophysics of Galaxies · Physics 2015-06-17 N. V. Kharchenko , A. E. Piskunov , E. Schilbach , S. Röser , R. -D. Scholz

We present a new, probabilistic method for determining the systemic proper motions of Milky Way (MW) ultra-faint satellites in the Dark Energy Survey (DES). We utilize the superb photometry from the first public data release (DR1) of DES to…

Astrophysics of Galaxies · Physics 2019-04-24 Andrew B. Pace , Ting S. Li

We present moderate-resolution spectroscopy of globular clusters (GCs) around the Sa/Sb spiral galaxy M81 (NGC 3031). Sixteen candidate clusters were observed with the Low Resolution Imaging Spectrograph on the Keck I telescope. All are…

We use Gaia Data Release 2 to determine the mean proper motions for 150 Milky Way globular clusters (almost the entire known population), with a typical uncertainty of 0.05 mas/yr limited mainly by systematic errors. Combining them with…

Astrophysics of Galaxies · Physics 2019-01-23 Eugene Vasiliev

We present an improved data-reduction technique to obtain high-precision proper motions (PMs) of globular clusters using Hubble Space Telescope data. The new reduction is superior to the one presented in the first paper of this series for…

Solar and Stellar Astrophysics · Physics 2018-07-25 M. Libralato , A. Bellini , R. van der Marel , J. Anderson , L. L. Watkins , G. Piotto , F. R. Ferraro , D. Nardiello , E. Vesperini

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…

Astrophysics · Physics 2009-11-13 Nicholas J. Rattenbury , Shude Mao

Red clump giants in the Galactic bulge are approximate standard candles and hence they can be used as distance indicators. We compute the proper motion dispersions of RCG stars in the Galactic bulge using the proper motion catalogue from…

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