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83 papers
Eta Carinae: the dissipating occulter is an extended structure
Theodore R. Gull, Henrik Hartman, Mairan Teodoro +10
Previous STIS long-slit observations of Eta Carinae identified numerous absorption features in both the stellar spectrum, and in the adjacent nebular spectra, along our line-of-sig…
Delayed Development of Cool Plasmas in X-ray Flares from kappa1 Ceti
Kenji Hamaguchi, Jeffrey W. Reep, Vladimir Airapetian +3
The Neutron star Interior Composition ExploreR (NICER) X-ray observatory observed two powerful X-ray flares equivalent to superflares from the nearby young solar-like star, kappa1…
Nested Dust Shells around the Wolf-Rayet Binary WR 140 observed with JWST
Ryan M. Lau, Matthew J. Hankins, Yinuo Han +29
Massive colliding-wind binaries that host a Wolf-Rayet (WR) star present a potentially important source of dust and chemical enrichment in the interstellar medium (ISM). However, t…
NICER X-ray Observations of Eta Carinae During its Most Recent Periastron Passage
David Espinoza-Galeas, Michael Francis Corcoran, Kenji Hamaguchi +12
We report high-precision X-ray monitoring observations in the 0.4-10 keV band of the luminous, long-period colliding-wind binary Eta Carinae up to and through its most recent X-ray…
Eta Carinae: an evolving view of the central binary, its interacting winds and its foreground ejecta
Theodore R. Gull, D. John Hillier, Henrik Hartman +13
FUV spectra of Eta Car, recorded across two decades with HST/STIS, document multiple changes in resonant lines caused by dissipating extinction in our line of sight. The FUV flux h…
Competitive X-ray and Optical Cooling in the Collisionless Shocks of WR 140
A. M. T. Pollock, M. F. Corcoran, I. R. Stevens +9
WR 140 is a long-period, highly eccentric Wolf-Rayet star binary system with exceptionally well-determined orbital and stellar parameters. Bright, variable X-ray emission is genera…