High energy processes in Wolf-Rayet stars
Sign Up to like & getrecommendations! Published in 2019 at "Astronomische Nachrichten"
DOI: 10.1002/asna.201913558
Abstract: Wolf-Rayet (WR) stars are massive ($\geq$10 M$_{\odot}$) evolved stars undergoing advanced nuclear burning in their cores, rapidly approaching the end of their lives as supernovae. Their powerful winds enrich the interstellar medium with heavy elements,… read more here.
Keywords: processes wolf; energy processes; high energy; wolf rayet ... See more keywords
Anisotropic winds in a Wolf–Rayet binary identify a potential gamma-ray burst progenitor
Sign Up to like & getrecommendations! Published in 2018 at "Nature Astronomy"
DOI: 10.1038/s41550-018-0617-7
Abstract: The massive evolved Wolf–Rayet stars sometimes occur in colliding-wind binary systems in which dust plumes are formed as a result of the collision of stellar winds1. These structures are known to encode the parameters of… read more here.
Keywords: anisotropic winds; gamma ray; wolf rayet; system ... See more keywords
Does the Wolf-Rayet binary CQ Cephei undergo sporadic mass transfer events?
Sign Up to like & getrecommendations! Published in 2017 at "Astronomy and Astrophysics"
DOI: 10.1051/0004-6361/201630360
Abstract: Context. Stellar wind mass-loss in binary systems carries away angular momentum causing a monotonic increase in the orbital period, Ṗ > 0. Despite possessing a significant stellar wind, the eclipsing Wolf-Rayet (WR) binary system CQ… read more here.
Keywords: mass loss; mass transfer; wolf rayet; mass ... See more keywords
Physical and kinematical characteristics of Wolf-Rayet central stars and their host planetary nebulae
Sign Up to like & getrecommendations! Published in 2023 at "Research in Astronomy and Astrophysics"
DOI: 10.1088/1674-4527/acd993
Abstract: We addressed the physical and kinematical properties of Wolf-Rayet [WR] central stars (CSs) and their hosting planetary nebulae (PNe). The studied sample comprises all [WR] CSs that are currently known. The analysis is based on… read more here.
Keywords: rayet central; physical kinematical; color; planetary nebulae ... See more keywords
Dust in the Wolf–Rayet nebula M 1-67
Sign Up to like & getrecommendations! Published in 2020 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/staa2272
Abstract: The Wolf-Rayet nebula M1-67 around WR124 is located above the Galactic plane in a region mostly empty of interstellar medium, which makes it the perfect target to study the mass-loss episodes associated with the late… read more here.
Keywords: wolf rayet; rayet nebula; dust; dust wolf ... See more keywords
Wolf–Rayet stars in the Antennae unveiled by MUSE
Sign Up to like & getrecommendations! Published in 2020 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/staa3304
Abstract: We present the analysis of archival Very Large Telescope (VLT) Multi-Unit Spectroscopic Explorer (MUSE) observations of the interacting galaxies NGC 4038/39 (a.k.a. the Antennae) at a distance of 18.1 Mpc. Up to 38 young star-forming complexes with… read more here.
Keywords: wolf rayet; rayet stars; muse; antennae unveiled ... See more keywords
A deep near-infrared spectroscopic survey of the Scutum-Crux arm for Wolf-Rayet stars
Sign Up to like & getrecommendations! Published in 2017 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/stx2103
Abstract: We present an NTT/SOFI spectroscopic survey of infrared selected Wolf-Rayet candidates in the Scutum-Crux spiral arm (298 < l < 340, |b| < 0.5). We obtained near-IR spectra of 127 candidates, revealing 17 Wolf-Rayet stars… read more here.
Keywords: wolf rayet; survey; wolf; scutum crux ... See more keywords
Revealing the nebular properties and Wolf-Rayet population of IC10 with Gemini/GMOS
Sign Up to like & getrecommendations! Published in 2017 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/stx2124
Abstract: We present a deep imaging and spectroscopic survey of the Local Group irregular galaxy IC10 using Gemini North and GMOS to unveil its global Wolf-Rayet (WR) population. We obtain a star formation rate (SFR) of… read more here.
Keywords: revealing nebular; wolf rayet; ic10; gmos ... See more keywords
Optical spectroscopy of star-forming regions in dwarf Wolf–Rayet galaxies
Sign Up to like & getrecommendations! Published in 2018 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/sty2933
Abstract: We present here spatially-resolved optical spectroscopic observations of four nearby dwarf Wolf-Rayet (WR) galaxies. The ages of the most recent starburst events in these galaxies are found between 3 and 10 Myr. The gas-phase metallicities… read more here.
Keywords: dwarf wolf; wolf rayet; star forming; spectroscopy ... See more keywords
Long-term X-ray variation of the colliding-wind Wolf–Rayet binary WR 125
Sign Up to like & getrecommendations! Published in 2019 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/sty3488
Abstract: WR 125 is considered as a Colliding Wind Wolf-rayet Binary (CWWB), from which the most recent infrared flux increase was reported between 1990 and 1993. We observed the object four times from November 2016 to… read more here.
Keywords: wolf rayet; colliding wind; wind wolf; ray ... See more keywords
Narrow-band Hα imaging of nearby Wolf–Rayet galaxies
Sign Up to like & getrecommendations! Published in 2019 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/stz2833
Abstract: We present narrow-band Hα imaging of nearby Wolf–Rayet (WR) galaxies known as a subset of starburst galaxies. The Hα images have been used to show morphology of star-forming regions in galaxies, which leads to speculate… read more here.
Keywords: band imaging; wolf rayet; imaging nearby; narrow band ... See more keywords