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Related papers: The present-day mass function of the Quintuplet cl…

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We employ a large sample of 20171 optically-selected groups and clusters at 0.15 < z < 0.4 in the SDSS to investigate how the stacked stellar mass fraction varies across a wide range of total mass, $M_{500}$. Our study improves upon…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-17 J. M. Budzynski , S. E. Koposov , I. G. McCarthy , V. Belokurov

It has recently been established that the properties of young star clusters (YSCs) can vary as a function of the galactic environment in which they are found. We use the cluster catalogue produced by the Legacy Extragalactic UV Survey…

We measure the star cluster mass function for the Local Group galaxy M33. We use the catalog of stellar clusters selected from the Panchromatic Hubble Andromeda Treasury: Triangulum Extended Region (PHATTER) survey. We analyze 711 clusters…

We present an analysis of the galaxy stellar mass function (SMF) of 14 known protoclusters between $2.0 < z < 2.5$ in the COSMOS field, down to a mass limit of $10^{9.5}$ M$_{\odot}$. We use existing photometric redshifts with a statistical…

Recent papers have found that the inferred slope of the high-mass ($>1.5$ M$_\odot$) IMF for field stars in the solar vicinity has a larger value ($\sim 1.7-2.1$) than the slopes ($\sim 1.2-1.7$; Salpeter= 1.35) inferred from numerous…

Astrophysics of Galaxies · Physics 2018-07-23 Antonio Parravano , David Hollenbach , Christopher F. McKee

In this paper, using 2MASS photometry, we study the mass functions $\phi(M) = dN/dM \propto M^{-\alpha}$ of a sample of nine clusters of ages varying from 4 Myr--1.2 Gyr and Galactocentric distances from 6--12 kpc. We look for evidence of…

Astrophysics of Galaxies · Physics 2015-05-27 Priya Hasan , S N Hasan

Deep and wide-field optical photometric observations along with multiwavelength archival datasets have been employed to study the physical properties of the cluster NGC 6910. The study also examines the impact of massive stars to their…

Solar and Stellar Astrophysics · Physics 2020-06-17 Harmeen Kaur , Saurabh Sharma , Lokesh K. Dewangan , Devendra K. Ojha , Alok Durgapal , Neelam Panwar

We present the first measurement of the mass function of galaxy clusters based directly on cluster masses derived from observations of weak gravitational lensing. To investigate the degree of sample incompleteness resulting from the X-ray…

Astrophysics · Physics 2009-02-06 H. Dahle

The Quintuplet is one of the most massive galactic clusters known, but appears to host a diverse stellar population that is difficult to reconcile with an instantaneous formation event. We present HST photometry and VLT spectroscopy in…

Solar and Stellar Astrophysics · Physics 2018-10-03 J. S. Clark , M. E. Lohr , L. R. Patrick , F. Najarro , H. Dong , D. F. Figer

We present the integrated properties of the stellar populations in the Universidad Complutense de Madrid Survey galaxies. Applying the techniques described in the first paper of this series, we derive ages, burst masses and metallicities of…

We study the possible rotation of cluster galaxies, developing, testing and applying a novel algorithm which identifies rotation, if such does exist, as well as its rotational centre, its axis orientation, rotational velocity amplitude and,…

Cosmology and Nongalactic Astrophysics · Physics 2016-12-16 M. Manolopoulou , M. Plionis

We analyze a sample of 3300 galaxies between redshifts z~3.5 and z~8.5 selected from JWST images in the Hubble Ultra Deep Field (HUDF) and UKIDSS Ultra Deep Survey field, including objects with stellar masses as low as ~ 10^8 Msun up to…

Although the stellar and substellar populations have been studied in various young and old open clusters, additional studies in clusters in the age range from 5 to 100 Myr is crucial (e.g. to give more constrains on initial mass function…

Solar and Stellar Astrophysics · Physics 2010-11-04 S. Boudreault , J. A. Caballero

The mass function (MF) of young ($\mathrm{age\lesssim 200}$ Myr) stellar clumps is an indicator of the mechanism driving the collapse of the interstellar medium (ISM) into giant molecular clouds. Typically, the clump MF in main-sequence…

The majority of clusters in the Universe have masses well below 10^5 Msun. Hence their integrated fluxes and colors can be affected by the random presence of a few bright stars introduced by stochastic sampling of the stellar mass function.…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-04 Morgan Fouesneau , Ariane Lançon , Rupali Chandar , Bradley C. Whitmore

We present a study of the star cluster population in the starburst irregular galaxy NGC 4449 based on B, V, I, and Ha images taken with the Advanced Camera for Surveys on the Hubble Space Telescope. We derive the cluster properties such as…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-30 Francesca Annibali , Monica Tosi , Alessandra Aloisi , Roeland P. van der Marel

Luminosity and mass functions in the old open cluster NGC 188 are analysed by means of J and H 2MASS photometry. Within the uncertainties, the observed projected radial density profile of NGC 188 departs from the two-parameter King model in…

Astrophysics · Physics 2009-11-10 C. Bonatto , E. Bica , J. F. C. Santos

We present new age and mass estimates for 920 stellar clusters in the Large Magellanic Cloud (LMC) based on previously published broad-band photometry and the stellar cluster analysis package, MASSCLEANage. Expressed in the generic fitting…

Astrophysics of Galaxies · Physics 2015-06-04 Bogdan Popescu , M. M. Hanson , Bruce G. Elmegreen

We measure the mass function for a sample of 840 young star clusters with ages between 10-300 Myr observed by the Panchromatic Hubble Andromeda Treasury (PHAT) survey in M31. The data show clear evidence of a high-mass truncation: only 15…

We present high dispersion echelle spectroscopy of the very luminous, young super star cluster (SSC) `F' in M82, obtained with the 4.2-m William Herschel Telescope (WHT), for the purpose of deriving its dynamical mass and assessing whether…

Astrophysics · Physics 2009-11-06 L. J. Smith , J. S. Gallagher