Results 101 to 110 of about 720,446 (211)
The impact of rotation on the line profiles of Wolf-Rayet stars
, 2015 The distribution of angular momentum in massive stars is a critical component of their evolution, yet not much is known on the rotation velocities of Wolf-Rayet stars.
Shenar, Tomer +2 more
core
1000–10,000 M⊙ Primordial Stars Created the Nitrogen Excess in GS 3073 at z = 5.55
The Astrophysical Journal LettersThe advent of the James Webb Space Telescope has revealed a wealth of new galaxies just a few hundred Myr after the Big Bang, a few of which exhibit unusual N/O ratios that are difficult to explain with stellar populations today.
Devesh Nandal +3 more
doaj +1 more source
The Astrophysical Journal, 1972 Twenty-five objects in M33 have been identified as Wolf-Rayet stars on the basis of narrow-band interference-filter photography. Spectra of two of the objects obtained by Lynds have been interpreted as WC5 or 6 +OB. Apparent blue continuum magnitudes range from +17.6 to the plate limit at +19.8 yielding absolute magnitudes in reasonable agreement with ...
James D. Wray, George J. Corso
openaire +1 more source
Photoelectric spectrophotometry of Wolf-Rayet stars [PDF]
, 1974 Photoelectric spectrum scans of five southern Wolf-Rayet stars in the spectral range lambda lambda 4600-4720 were analyzed to study the variability of brightness and of emission line strengths.
Bahng, J. D. R.
core
Classification of Wolf–Rayet Stars Using Ensemble-based Machine Learning Algorithms
The Astrophysical JournalWe develop a robust machine learning classifier model utilizing the eXtreme-Gradient Boosting (XGB) algorithm for improved classification of Galactic Wolf–Rayet (WR) stars based on IR colors and positional attributes.
Subhajit Kar +4 more
doaj +1 more source
Evolution of wide O star binaries through their luminous blue variable stage
Astronomy & AstrophysicsContext. Long-period Wolf-Rayet (WR) star binaries produced by mass transfer are predicted to be abundant, but they are observationally rare. This yields constraints on the evolution of initially wide O star binaries, including those potentially leading ...
Xu Xiao-Tian +8 more
doaj +1 more source
Violet absorption edges of C IV lines in Wolf-Rayet spectra: possible superposition with diffuse interstellar bands at 5780Å and 5797Å [PDF]
, 1978 It is shown that the violet edges normally seen in Wolf-Rayet stars around 5800Å are principally due to displaced C IV absorption. The diffuse interstellar bands are seldom of comparable strength and can be seen separately if the absorption ...
Giridhar, Sunitra, Bappu, M. K. V.
core +3 more sources
Wolf-Rayet stars and chemical enrichment
, 2003 Computational models of Wolf-Rayet and other massive stars are presented at solar metallicity and at a range of non-solar metallicities from Z = 0.03 to Z = 0.0001.
Dray, L M
core
The Astrophysical JournalWe analyze an unprecedented 4.5 contiguous months of 2015–2016 BRITE nanosatellite precision optical photometry of the 7th mag Wolf–Rayet (WR) star EZ CMa = WR 6 = HD 50896.
Anthony F. J. Moffat +3 more
doaj +1 more source
Resolving Individual Massive Stars in an M31 Star Cluster Exhibiting Wolf–Rayet Features
UniverseThe observed ratio of Wolf–Rayet (WR) star subtypes (e.g., WC/WN) in M31 is significantly higher than the predictions of standard stellar evolution models, yet this key diagnostic discrepancy remains unresolved.
Yunning Zhao +7 more
doaj +1 more source