Results 31 to 40 of about 429,563 (275)
The Stellar Content of Obscured Galactic Giant H II Regions: II. W42 [PDF]
, 2000 We present near infrared J, H, and K images and K-band spectroscopy in the giant HII region W42. A massive star cluster is revealed; the color-color plot and K-band spectroscopic morphology of two of the brighter objects suggest the presence of young ...
Blum, R. D., Conti, P. S., Damineli, A.
core +3 more sources
The Astrophysical Journal, 2023 We present a comprehensive analysis of the Galactic mid-infrared bubble [HKS2019] E70 (E70) by adopting a multiwavelength approach to understand the physical environment and star formation scenario around it.
Aayushi Verma +10 more
doaj +1 more source
The effect of the dynamical state of clusters on gas expulsion and infant mortality [PDF]
, 2008 The star formation efficiency (SFE) of a star cluster is thought to be the critical factor in determining if the cluster can survive for a significant (>50 Myr) time.
A.-K. Jappsen +32 more
core +2 more sources
Halpha-Derived Star-Formation Rates For Three z ~ 0.75 EDisCS Galaxy Clusters [PDF]
, 2005 We present Halpha-derived star-formation rates (SFRs) for three z ~ 0.75 galaxy clusters. Our 1 sigma flux limit corresponds to a star-formation rate of 0.10-0.24 solar mass per year, and our minimum reliable Halpha + [N II] rest-frame equivalent width ...
Barbaro G. +11 more
core +1 more source
Kernel Density Estimation in the Study of Star Clusters
Open Astronomy, 2016 The kernel estimator method is used to evaluate the surface and spatial star number density in star clusters. Both density maps and radial density profiles are plotted.
Seleznev Anton F.
doaj +1 more source
HOW FAR CAN GET FRB PROGENITOR NEUTRON STARS FROM THEIR BIRTHPLACE?
Вестник. Серия физическая, 2021 The recent studies show evidence of magnetars – young neutron stars being good candidates of fast radio birth sources. Neutron stars can form as remnants of type II supernovae explosions of young stars.
A. Otebay, M. Kalambay, B. Shukirgaliyev
doaj +1 more source
The role of the central stellar cluster in active galactic nuclei. I. Semi-analytical model [PDF]
, 2002 The subject of the paper is the role of the massive stellar cluster in the activity phenomenon and in the structure of active galactic nuclei. We introduce a simple model of stellar dynamics in the internal part of the cluster, which allows us to include
Czerny, B., Vilkoviskij, E. Y.
core +2 more sources
Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 2010 Dynamical evolution plays a key role in shaping the current properties of star clusters and star cluster systems. A detailed understanding of the effects of evolutionary processes is essential to be able to disentangle the properties that result from dynamical evolution from those imprinted at the time of cluster formation.
openaire +3 more sources
Does God play dice with star clusters?
The Open Journal of Astrophysics, 2023 When a detailed model of a stellar population is unavailable, it is most common to assume that stellar masses are independently and identically distributed according to some distribution: the universal initial mass function (IMF). However, stellar masses
Michael Y. Grudic +4 more
doaj +1 more source
Do O-stars form in isolation? [PDF]
, 2007 Around 4% of O-stars are observed in apparent isolation, with no associated cluster, and no indication of having been ejected from a nearby cluster. We define an isolated O-star as a star > 17.5 M_\odot in a cluster with total mass 10 M_\odot) stars.
Bastian +25 more
core +3 more sources