Zobrazeno 1 - 10
of 35
pro vyhledávání: '"Kenneth G. Gayley"'
Autor:
Sean J. Gunderson, Kenneth G. Gayley
Publikováno v:
The Astrophysical Journal, Vol 965, Iss 2, p 174 (2024)
We present a general procedure for deriving a line-profile model for massive-star X-ray spectra that captures the dynamics of the wind more directly. The basis of the model is the analytic solution to the problem of variable jets in Herbig–Haro obj
Externí odkaz:
https://doaj.org/article/00e16e9b141d4476982837be760a1ca7
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 522:2739-2746
We use the line ratios of resolved X-ray resonance and satellite line pairs from Si xiii and Mg xi ions to test the widely held assumption that the shocked plasma in the wind of hot stars is in collisional ionization equilibrium. We specifically appl
Autor:
Geraldine J. Peters, Kenneth G. Gayley, Richard Ignace, Carol E. Jones, Yaël Nazé, Nicole St-Louis, Heloise Stevance, Jorick S. Vink, Noel D. Richardson, Jennifer L. Hoffman, Jamie R. Lomax, Tomer Shenar, Andrew G. Fullard, Paul A. Scowen
Publikováno v:
Astrophysics and Space Science, 367(12):119. Springer Netherlands
One objective of the Polstar spectropolarimetry mission is to characterize the degree of nonconservative mass transfer that occurs at various stages of binary evolution, from the initial mass reversal to the late Algol phase. The proposed instrument
Autor:
Kenneth G. Gayley, Jorick S. Vink, Asif ud-Doula, Alexandre David-Uraz, Richard Ignace, Raman Prinja, Nicole St-Louis, Sylvia Ekström, Yaël Nazé, Tomer Shenar, Paul A. Scowen, Natallia Sudnik, Stan P. Owocki, Jon O. Sundqvist, Florian A. Driessen, Levin Hennicker
Publikováno v:
Astrophysics and Space Science, 367(12):123. Springer Netherlands
The most massive stars are thought to lose a significant fraction of their mass in a steady wind during the main-sequence and blue supergiant phases. This in turn sets the stage for their further evolution and eventual supernova, and preconditions th
We attempt to determine the driver for clumping in hot-star winds by extending the measure of the spectral variability level of Galactic Wolf-Rayet stars to by far the hottest known among them, the WN2 star WR 2 and the WO2 stars WR 102 and WR 142. T
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4dde13a8391c179315882f9f304bf87d
http://arxiv.org/abs/2009.10341
http://arxiv.org/abs/2009.10341
Autor:
Manuel Güdel, Eric Gaidos, Gregg Hallinan, Kenneth G. Gayley, Robert L. Mutel, Christene Lynch, Stephen L. Skinner, Bibiana Fichtinger
Aims. Observations of free-free continuum radio emission of four young main-sequence solar-type stars (EK Dra, π 1 UMa, χ 1 Ori, and κ 1 Cet) are studied to detect stellar winds or at least to place upper limits on their thermal radio emission, wh
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2aef577a87d2b4cc53a76fad83661f27
Autor:
Kenneth G. Gayley
Publikováno v:
The Astrophysical Journal. 851:113
Derived here is a more conceptually intuitive means of interpreting magnetic-field diagnostics from circularly polarized lines in a wide array of astrophysical applications. The method applies to individual "Stokes V" profile snapshots and complement
Autor:
John D. Monnier, Peter G. Tuthill, William C. Danchi, Nicholas R. J. Lawrance, Stan Owocki, Kenneth G. Gayley
Publikováno v:
The Astrophysical Journal. 675:698-710
Results from the most extensive study of the time-evolving dust structure around the prototype "Pinwheel" nebula WR 104 are presented. Encompassing 11 epochs in three near-infrared filter bandpasses, a homogeneous imaging data set spanning more than
Autor:
Joy S. Nichols, Lidia M. Oskinova, Norbert S. Schulz, David P. Huenemoerder, Kenneth G. Gayley, Wolf-Rainer Hamann, A. M. T. Pollock, Richard Ignace, Tomer Shenar
With a deep Chandra/HETGS exposure of WR 6, we have resolved emission lines whose profiles show that the X-rays originate from a uniformly expanding spherical wind of high X-ray-continuum optical depth. The presence of strong helium-like forbidden li
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::81a09e3029d4c2e88513e1ef3e5bd29f
Autor:
D. P. Huenemoerder, Maurice A. Leutenegger, Noel D. Richardson, Rosina C. Iping, Tomer Shenar, Christopher M. P. Russell, Stan Owocki, W. L. Waldron, Yaël Nazé, Nancy Remage Evans, K. T. Hole, Jennifer Lauer, J. L. Hoffman, Herbert Pablo, W.-R. Hamann, K. Hamaguchi, Lida Oskinova, Kenneth G. Gayley, J. Nichols, R. Ignace, T. R. Gull, Jamie R. Lomax, Michael F. Corcoran, A. M. T. Pollock, A. F. J. Moffat
We present an overview of four phase-constrained Chandra HETGS X-ray observations of Delta Ori A. Delta Ori A is actually a triple system which includes the nearest massive eclipsing spectroscopic binary, Delta Ori Aa, the only such object which can
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cba27df90820d6f04f25f8cd487a6b2c