Results 21 to 30 of about 753 (61)

Environments of massive stars and the upper mass limit

open access: yes, 2011
The locations of massive stars (> 8 Msun) within their host galaxies is reviewed. These range from distributed OB associations to dense star clusters within giant HII regions.
Crowther, Paul A.
core   +1 more source

The R136 star cluster hosts several stars whose individual masses greatly exceed the accepted 150 Msun stellar mass limit [PDF]

open access: yes, 2010
Spectroscopic analyses of H-rich WN5-6 stars within the young star clusters NGC 3603 and R136 are presented, using archival HST & VLT spectroscopy, & high spatial resolution near-IR photometry. We derive high T* for the WN stars in NGC 3603 (T*~42+/-2 kK)
Andersen   +125 more
core   +3 more sources

The Massive Star-forming Regions Omnibus X-ray Catalog [PDF]

open access: yes, 2014
We present the Massive Star-forming Regions (MSFRs) Omnibus X-ray Catalog (MOXC), a compendium of X-ray point sources from {\em Chandra}/ACIS observations of a selection of MSFRs across the Galaxy, plus 30 Doradus in the Large Magellanic Cloud.
Bouwman, Jeroen   +7 more
core   +1 more source

The Onfp Class in the Magellanic Clouds [PDF]

open access: yes, 2010
The Onfp class of rotationally broadened, hot spectra was defined some time ago in the Galaxy, where its membership to date numbers only eight. The principal defining characteristic is a broad, centrally reversed He II $\lambda$4686 emission profile ...
Anthony F. J. Moffat   +41 more
core   +3 more sources

Gravity-mode period spacings as seismic diagnostic for a sample of gamma Doradus stars from Kepler space photometry and high-resolution ground-based spectroscopy [PDF]

open access: yes, 2015
Gamma Doradus stars (hereafter gamma Dor stars) are gravity-mode pulsators of spectral type A or F. Such modes probe the deep stellar interior, offering a detailed fingerprint of their structure.
Aerts, C.   +22 more
core   +2 more sources

Eta Carinae and the Luminous Blue Variables

open access: yes, 2011
We evaluate the place of Eta Carinae amongst the class of luminous blue variables (LBVs) and show that the LBV phenomenon is not restricted to extremely luminous objects like Eta Car, but extends luminosities as low as log(L/Lsun) = 5.4 - corresponding ...
A Gal-Yam   +112 more
core   +1 more source

Radio Emission from an Ultraluminous X-Ray Source [PDF]

open access: yes, 2003
The physical nature of ultraluminous x-ray sources is uncertain. Stellar mass black holes with beamed radiation and intermediate mass black holes with isotropic radiation are two plausible explanations.
Corbel, Stephane   +3 more
core   +3 more sources

HD 51106 and HD 50747: an ellipsoidal binary and a triple system observed with CoRoT

open access: yes, 2009
We present an analysis of the observations of HD 51106 and HD 50747 by the satellite CoRoT, obtained during its initial run, and of the spectroscopic preparatory observations.
A. Baglin   +33 more
core   +3 more sources

Do high energy astrophysical neutrinos trace star formation?

open access: yes, 2015
The IceCube Neutrino Observatory has provided the first map of the high energy (~ 0.01 -- 1 PeV) sky in neutrinos. Since neutrinos propagate undeflected, their arrival direction is an important identifier for sources of high energy particle acceleration.
Emig, Kimberly   +2 more
core   +1 more source

On Luminous Blue Variables as the Progenitors of Core-Collapse Supernovae, especially Type IIn Supernovae

open access: yes, 2010
Luminous blue variable (LBV) stars are very massive, luminous, unstable stars that suffer frequent eruptions. In the last few years, these stars have been proposed as the direct progenitors of some core-collapse supernovae (SNe), particularly Type IIn ...
Aldering   +97 more
core   +1 more source

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