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Related papers: Structural Parameters of Mayall II = G1 in M31

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We report the discovery of two new globular clusters in the remote halos of M81 and M82 in the M81 Group based on Hubble Space Telescope archive images. They are brighter than typical globular clusters (MV = -9.34 mag for GC-1 and M_V =…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-05 In Sung Jang , Sungsoon Lim , Hong Soo Park , Myung Gyoon Lee

Surface brightness profiles for 23 M31 star clusters were measured using images from the Wide Field Planetary Camera 2 on the Hubble Space Telescope, and fit to two types of models to determine the clusters' structural properties. The…

Astrophysics of Galaxies · Physics 2011-01-07 P. Barmby , S. Perina , M. Bellazzini , J. G. Cohen , P. W. Hodge , J. P. Huchra , M. Kissler-Patig , T. H. Puzia , J. Strader

We combine our compilation of photometry of M31 globular cluster and probable cluster candidates with new near-infrared photometry for 30 objects. Using these data we determine the globular cluster luminosity function (GCLF) in multiple…

Astrophysics · Physics 2007-05-23 P. Barmby , J. P. Huchra , J. P. Brodie

[Abridged] M31 has several times more globular clusters (GCs) than the Milky Way. It contains a correspondingly larger number of low mass X-ray binaries (LMXBs) associated with GCs, and can be used to investigate the GC properties which…

Astrophysics of Galaxies · Physics 2015-06-17 J. R. R. Agar , P. Barmby

We present a structural analysis of halo star clusters in M31 based on deep Hubble Space Telescope (HST) Advanced Camera for Surveys (ACS) imaging. The clusters in our sample span a range in galactocentric projected distance from 13 to 100…

Following on from our discovery of a significant population of M31 outer halo globular clusters (GCs), and updates to the Revised Bologna Catalogue of M31 GCs, we investigate the GC system of M31 out to an unprecedented radius (~120kpc). We…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-27 A. P. Huxor , A. M. N. Ferguson , N. R. Tanvir , M. J. Irwin , A. D. Mackey , R. A. Ibata , T. Bridges , S. C. Chapman , G. F. Lewis

We present the first results of a large spectroscopic survey of candidate globular clusters located in the extreme outskirts of the nearby M31 galaxy. We obtained low resolution spectra of 48 targets selected from the XSC of 2MASS, as in…

Astrophysics · Physics 2009-11-13 S. Galleti , M. Bellazzini , L. Federici , A. Buzzoni , F. Fusi Pecci

An overall analysis of the structure and stellar content of M11 is presented, thanks to the wide-angle 2MASS spatial coverage. We derive photometric and structural parameters and discuss the spatial dependance of the luminosity and mass…

Astrophysics · Physics 2009-11-11 J. F. C. Santos , C. Bonatto , E. Bica

We present internal velocity dispersions and precise radial velocities for 200 globular clusters (GCs) in M31 that are derived using new high-resolution spectra from MMT/Hectochelle. Of these, 163 also have King model structural parameters…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-28 Jay Strader , Nelson Caldwell , Anil Seth

In this paper, we present photometry of 53 globular clusters (GCs) in the M31 outer halo, including the {\sl GALEX} FUV and NUV, SDSS $ugriz$, 15 intermediate-band filters of BATC, and 2MASS $JHK_{\rm s}$ bands. By comparing the multicolour…

Astrophysics of Galaxies · Physics 2019-03-06 Song Wang , Jun Ma , Jifeng Liu

We have obtained velocity dispersions from Keck high-resolution integrated spectroscopy of ten M31 globular clusters (GCs), including three candidate intermediate-age GCs. We show that these candidates have the same V-band mass-to-light…

Astrophysics of Galaxies · Physics 2015-05-13 Jay Strader , Graeme Smith , Soeren Larsen , Jean Brodie , John Huchra

We present 2MASS $JHK_{\rm s}$ photometry for 913 star clusters and candidates in the field of M31, which are selected from the latest Revised Bologna Catalog of M31 globular clusters (GCs) and candidates. The photometric measurements in…

Astrophysics of Galaxies · Physics 2014-04-18 Song Wang , Jun Ma , Zhenyu Wu , Xu Zhou

We present a comparison between the observational data on the kinematical structure of G1 in M31, obtained with the Hubble WFPC2 and STIS instruments, and the results of dynamical simulations carried out using the special-purpose computer…

We report the first results from deep ACS imaging of ten classical globular clusters in the far outer regions (15 < R_p < 100 kpc) of M31. Eight of the clusters, including two of the most remote M31 globular clusters presently known, are…

We present three new clusters discovered in the halo of M31 which, although having globular-like colours and luminosities,have an unusually large half-light radii, ~30 pc. They lie at projected galactocentric distances of approx. 15 to 35…

We describe images of the center of the dense globular cluster M15 (NGC 7078) obtained with the Hubble Space Telescope Wide Field and Planetary Camera 2 (WFPC2). Data taken in the F336W, F439W, and F555W filters (approximately U, B, and V)…

Astrophysics · Physics 2009-10-28 Puragra Guhathakurta , Brian Yanny , Donald P. Schneider , John N. Bahcall

We have investigated a number of globular cluster candidates from a recent wide-field study by Harris et al. (2004a) of the giant elliptical galaxy NGC 5128. We used the Magellan I telescope + MagIC camera under excellent seeing (0.3"-0.6")…

Astrophysics · Physics 2009-11-11 M. Gomez , D. Geisler , W. E. Harris , T. Richtler , G. L. H. Harris , K. Woodley

(Abridged) The projected structures and integrated properties of the Andromeda I, II, III, V, VI, VII and Cetus dwarf spheroidal galaxies are analysed based upon resolved counts of red giant branch stars. For each object, we have derived…

Astrophysics · Physics 2009-11-13 Alan McConnachie , Mike Irwin

Globular clusters (GCs) are important tools to rebuild the accretion history of a galaxy. There are newly discovered GCs in the Sagittarius (Sgr) dwarf galaxy, that can be used as probes of the accretion event onto the Milky Way (MW). Our…

Astrophysics of Galaxies · Physics 2021-10-04 E. R. Garro , D. Minniti , M. Gómez , J. Alonso-García

We report new HST/WFPC2 photometry for 10 globular clusters (GC) in M31 observed in F5555W(V) and F814W(I). Additionally we have reanalyzed HST archival data of comparable quality for 2 more GCs. Extraordinary care is taken to account for…

Astrophysics · Physics 2009-11-10 R. M. Rich , C. E. Corsi , C. Cacciari , L. Federici , F. Fusi Pecci , S. G. Djorgovski