Results 51 to 60 of about 438,137 (232)

Calibration of radii and masses of open clusters with a simulation

open access: yes, 2010
Context: A recent new approach to apply a simple dynamical mass estimate of tidally limited star clusters is based on the identification of the tidal radius in a King profile with the dynamical Jacobi radius.
A. Ernst   +20 more
core   +1 more source

Radio Triggered Star Formation in Cooling Flows

open access: yes, 1999
The giant galaxies located at the centers of cluster cooling flows are frequently sites of vigorous star formation. In some instances, star formation appears to have been triggered by the galaxy's radio source.
Allen   +34 more
core   +2 more sources

A Tale of Three Dwarfs: Cluster-based Star Formation Histories of Blue Compact Dwarf Galaxies

open access: yesThe Astrophysical Journal
We present a new study of the cluster populations in the blue compact dwarf galaxies (BCD) ESO185-IG13, ESO338-IG04, and Haro11, based on new and archival high-resolution images taken by the Hubble Space Telescope, and the first to probe the populations ...
Rupali Chandar   +11 more
doaj   +1 more source

Star-Forming Galaxies at z~2 and the Formation of the Metal-Rich Globular Cluster Population

open access: yes, 2010
We examine whether the super star-forming clumps (R~1-3 kpc; M~10^8-10^9.5 Msun) now known to be a key component of star-forming galaxies at z~2 could be the formation sites of the locally observed old globular cluster population.
Armandroff   +71 more
core   +1 more source

Cluster Formation in a Filamentary Cloud: The Case of the Stellar Cluster NGC 2316

open access: yesThe Astronomical Journal
We present a multiwavelength analysis of the star cluster NGC 2316 and its surroundings. We estimated the physical parameters of the NGC 2316 cluster, including its shape (elongated), size ( R _cluster = 0.4 pc), distance (1.3 ± 0.3 kpc), and minimum ...
Saurabh Sharma   +9 more
doaj   +1 more source

Euclid: Early Release Observations – The star cluster systems of the Local Group dwarf galaxies IC 10 and NGC 6822★

open access: yesAstronomy & Astrophysics
Star clusters are valuable indicators of galaxy evolution, offering insights into the buildup of stellar populations across cosmic time. Understanding the intrinsic star cluster populations of dwarf galaxies is particularly important given these systems’
Howell J. M.   +151 more
doaj   +1 more source

Double Star/Cluster observation of neutral sheet oscillations on 5 August 2004 [PDF]

open access: yesAnnales Geophysicae, 2005
Previous Cluster observations have shown that the flapping motions of the Earth's magnetotail are of internal origin and that kink-like waves are emitted from the central part of the tail and propagate toward the tail flanks. The newly launched Double
T. L. Zhang   +12 more
doaj   +1 more source

New Wolf-Rayet star and its circumstellar nebula in Aquila

open access: yes, 2009
We report the discovery of a new Wolf-Rayet star in Aquila via detection of its circumstellar nebula (reminiscent of ring nebulae associated with late WN stars) using the Spitzer Space Telescope archival data.
A. F. Valeev   +56 more
core   +1 more source

Dynamics of Star Cluster Formation: The Effects of Ongoing Star Formation and Stellar Feedback

open access: yesThe Astrophysical Journal
We perform a high-resolution zoomed-in simulation of star cluster assembly including the merger of two subclusters with initial conditions taken from previous large-scale giant molecular cloud (GMC) simulations.
Jeremy Karam   +2 more
doaj   +1 more source

Deep Galaxy Stellar Mass Functions As a Function of Star Formation Rate in the Virgo Cluster Environment

open access: yesThe Astrophysical Journal
We analyze deep ( M _* ≳ 10 ^7 M _⊙ ) galaxy stellar mass functions (SMFs) of the Virgo cluster using stellar masses derived as part of the Next Generation Virgo Survey. The total SMF has a slope of $\alpha =-1.3{5}_{-0.02}^{+0.02}$ , which is similar to
Cameron R. Morgan   +10 more
doaj   +1 more source

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