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Related papers: Absolute proper motion of the Galactic open cluste…

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Proper motions (PMs) are crucial to fully understand the internal dynamics of globular clusters (GCs). To that end, the Hubble Space Telescope (HST) Proper Motion (HSTPROMO) collaboration has constructed large, high-quality PM catalogues…

Astrophysics of Galaxies · Physics 2017-01-31 Laura L. Watkins , Roeland P. van der Marel , Andrea Bellini , A. T. Baldwin , P. Bianchini , J. Anderson

We have undertaken a long term program to measure high precision proper motions of nearby Galactic globular cluster (GC) stars using multi-epoch observations with the WFPC2 and the ACS cameras on-board the Hubble Space Telescope. The proper…

Astrophysics · Physics 2007-05-23 L. R. Bedin , G. Piotto , J. Anderson , I. R. King

Recent observational studies using the Hubble Space Telescope (HST) have derived the center-of-mass proper motion (CMPM) of the Large Magellanic Cloud (LMC). Although these studies carefully treated both rotation and perspective effects in…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-27 Kenji Bekki

We present $\it{Hubble}$ $\it{Space}$ $\it{Telescope}$ proper motions in the direction of the star cluster NGC$\,$419 in the Small Magellanic Cloud. Because of the high precision of our measurements, for the first time it is possible to…

Astrophysics of Galaxies · Physics 2020-11-18 Davide Massari , Silvia Raso , Mattia Libralato , Andrea Bellini

We derive relative proper motions of stars in the fields of globular clusters M4, M12, M22, NGC 3201, NGC 6362 and NGC 6752 based on a uniform data set collected between 1997 and 2008. We assign a membership class for each star with a…

Solar and Stellar Astrophysics · Physics 2013-01-15 K. Zloczewski , J. Kaluzny , M. Rozyczka , W. Krzeminski , B. Mazur , I. B. Thompson

We study the dynamics of the giant elliptical galaxy M87 from the central to the outermost regions with the made-to-measure (M2M) method. We use a new catalogue of 922 globular cluster line-of- sight velocities extending to a projected…

We use deep multi-epoch PSF photometry taken with the Visible and Infrared Survey Telescope for Astronomy (VISTA) to measure and analyze the proper motions of stars within the Galactic globular cluster 47 Tucanae (47 Tuc, NGC 104). The…

We use spectra observed with the integral-field spectrograph MUSE to reveal the central kinematics of the Galactic globular cluster Messier 80 (M80, NGC 6093). Using observations obtained with the recently commissioned narrow-field mode of…

Relative proper motions and cluster membership probabilities of 30 stars within an area of 14' of diameter centered in the open cluster NGC1662 (\alpha=04^{\rm h}48^{\rm m}, \delta=+10^{\rm o}56') are determined by combining positions of…

Astrophysics · Physics 2007-05-23 W. S. Dias , R. Boczko , J. I. B. Camargo , R. Teixeira , P. Benevides-Soares

We computed proper motions of a selected sample of globular clusters projected on the central bulge, employing CCD images gathered along the last 25 years at the ESO-NTT, ESO-Danish and HST telescopes. We presented a method to derive their…

Astrophysics of Galaxies · Physics 2015-05-27 L. J. Rossi , S. Ortolani , B. Barbuy , E. Bica , A. Bonfanti

AIMS: In their 1st extension to the Milky Way Star Clusters (MWSC) survey, Schmeja et al. applied photometric filters to the 2MASS to find new cluster candidates that were subsequently confirmed or rejected by the MWSC pipeline. To further…

Solar and Stellar Astrophysics · Physics 2015-09-02 R. -D. Scholz , N. V. Kharchenko , A. E. Piskunov , S. Röser , E. Schilbach

Mean proper motions and parallaxes of 205 open clusters were determined from their member stars found in the Hipparcos Catalogue. 360 clusters were searched for possible members, excluding nearby clusters with distances D < 200 pc. Members…

Astrophysics · Physics 2009-10-31 H. Baumgardt , C. Dettbarn , R. Wielen

WFPC2 images obtained with the Hubble Space telescope 4.16 years apart have allowed us to measure the proper motion of the metal rich globular cluster NGC 6553 with respect to the background bulge stars. With a space velocity of (${\Pi},…

Astrophysics · Physics 2016-01-27 M. Zoccali , A. Renzini , S. Ortolani , E. Bica , B. Barbuy

Open star clusters from the MWSC (Milky Way Star Clusters) catalogue have been used to determine the Galactic rotation parameters. The circular rotation velocity of the solar neighborhood around the Galactic center has been found from data…

Astrophysics of Galaxies · Physics 2016-09-30 V. V. Bobylev , A. T. Bajkova , K. S. Shirokova

We study the mass distribution and kinematics of the giant elliptical galaxy M87 (NGC 4486) using discrete chemo-dynamical, axisymmetric Jeans equation modelling. Our catalogue comprises 894 globular clusters (GCs) extending to a projected…

We have investigated the peculiar motions of clusters of galaxies in the Ursa Major (UMa) supercluster and its neighborhood. Based on SDSS (Sloan Digital Sky Survey) data, we have compiled a sample of early-type galaxies and used their…

Astrophysics · Physics 2009-06-23 Flera G. Kopylova , Alexander I. Kopylov

We present and analyze kinematics and orbits for a sample of 488 open clusters in the Galaxy. The velocity ellipsoid for our present sample is derived as ($\sigma_{U}$, $\sigma_{V}$, $\sigma_{W})$=$(28.7$, 15.8, 11.0) km s$^{-1}$ which…

Astrophysics of Galaxies · Physics 2009-09-22 Zhen-Yu Wu , Xu Zhou , Jun Ma , Cui-Hua Du

We are using full spectrum fitting to determine the ages and metallicities of Galactic clusters (M67 and globular clusters). We find that the method is very accurate to measure the metallicity. Blue horizontal branches are well identified…

Astrophysics · Physics 2009-11-13 Mina Koleva , Philippe Prugniel , Pierre Ocvirk , Damien Le Borgne

The authors of the article set out to investigate the motion of Globular Star Clusters (GCs) of the Milky Way relative to the plane and center of the Galaxy. For this study, we used data from 164 Galactic Globular Clusters derived from…

Astrophysics of Galaxies · Physics 2024-10-25 G. S. Karapetian , A. P. Mahtessian , M. A. Hovhannisyan , L. A. Mahtessian

We present the first spatially resolved map of stellar proper motions within the central ($\sim$3.1 $\times$ 2.4 kpc) regions of the Small Magellanic Cloud (SMC). The data used for this study encompasses four tiles from the ongoing…