OBSERVATIONAL CONSTRAINTS ON THE HD 5980 WIND-WIND COLLISION

Autor: G. Koenigsberger, N. Morrell, D. J. Hillier, W. Schmutz, R. Gamen, J. I. Arias, R. Barbá, G. Ferrero

Publikováno v: Revista Mexicana de Astronomía y Astrofísica. 58:403-441

Analysis of spectral line profile variations observed over 6 decades in the Wolf-Rayet system HD 5980 lead to the conclusion that Star A, the variable member of the system, has always dominated the wind collision zone (WCZ), contrary to suggestions t

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::d9e42c26d7a4f5201f0fa32e31b6ac8e
https://doi.org/10.22201/ia.01851101p.2022.58.02.19

Helium stars exploding in circumstellar material and the origin of Type Ibn supernovae

Autor: L. Dessart, H. Kuncarayakti, D. J. Hillier

Publikováno v: Astronomy and Astrophysics-A&A
Astronomy and Astrophysics-A&A, 2022, 658, pp.A130. ⟨10.1051/0004-6361/202142436⟩

Type Ibn supernovae (SNe) are a mysterious class of transients whose spectra exhibit persistently narrow HeI lines, and whose bolometric light curves are typically fast evolving and overluminous at peak relative to standard Type Ibc SNe. We explore t

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::003899bd7f7828fb802b44f8c12e0fd1
https://hal.archives-ouvertes.fr/hal-03477025

VLTI-MATISSE chromatic aperture-synthesis imaging of η Carinae's stellar wind across the Brα line: Periastron passage observations in February 2020

Autor: Th. Rivinius, C. M. P. Russell, A. Domiciano de Souza, Uwe Beckmann, Lucas Labadie, F. Allouche, P. Cruzalèbes, Sylvie Robbe-Dubois, Antoine Mérand, William C. Danchi, A. F. J. Moffat, Kenji Hamaguchi, Michael F. Corcoran, József Varga, Alexis Matter, Thomas I. Madura, Stephane Lagarde, Sebastian Wolf, Anthony Meilland, Walter Jaffe, Paul Bristow, T. R. Gull, Felix Bettonvil, D. A. Espinoza-Galeas, Jose H. Groh, J. C. Augereau, Carsten Dominik, W. J. de Wit, Markus Schöller, J. Leftley, V. Hocdé, Uwe Graser, R. van Boekel, F. Navarete, L. Klarmann, K. Ohnaka, Leonard Burtscher, Th. Henning, Karl-Heinz Hofmann, Augusto Damineli, Ian R. Stevens, C. Connot, Klaus Meisenheimer, Stefan Kraus, Patrick W. Morris, G. Yoffe, Michiel R. Hogerheijde, Romain Petrov, Ph. Berio, M. Heininger, Henrik Hartman, J. W. Isbell, Markus Wittkowski, Eric Pantin, E. Kokoulina, J. Drevon, Julien Woillez, L. B. F. M. Waters, E. Nußbaum, Dieter Schertl, Bruno Lopez, Alexander Kreplin, Gerd Weigelt, Florentin Millour, D. J. Hillier, J. Hron, M. Lehmitz, V. Gámez Rosas, J. Sanchez-Bermudez, Noel D. Richardson, C. A. Hummel, Claudia Paladini, Andrea Mehner, Farrokh Vakili, Andreas Glindemann, P. Antonelli, C. Leinert, Gérard Zins, Philippe Stee

Publikováno v: Astronomy & Astrophysics, 652:A140. EDP Sciences
Astronomy & Astrophysics, 652
Astronomy & Astrophysics, 652, 1-22
Astronomy & Astrophysics, 652, pp. 1-22

Context. Eta Carinae is a highly eccentric, massive binary system (semimajor axis ~15.5 au) with powerful stellar winds and a phase-dependent wind-wind collision (WWC) zone. The primary star, η Car A, is a luminous blue variable (LBV); the secondary

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d06daaf6607db2ea8e3aee0292014bdb
https://dare.uva.nl/personal/pure/en/publications/vltimatisse-chromatic-aperturesynthesis-imaging-of--carinaes-stellar-wind-across-the-br-line(1b2ef33d-ecf6-411a-8241-108b7aa6f984).html

New hydrodynamic solutions for line-driven winds of hot massive stars using Lambert $W$-function

Autor: A. C. Gormaz-Matamala, Francisco Najarro, Michel Curé, D. J. Hillier, B. Kubátová, Jiří Kubát

Publikováno v: The Astrophysical Journal

Hot massive stars present strong stellar winds that are driven by absorption, scattering and re\-emission of photons by the ions of the atmosphere (\textit{line-driven winds}). A better comprehension of this phenomenon, and a more accurate calculatio

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ea2f36b502498e21e7fe3c2e47ff22fd
http://arxiv.org/abs/2106.15060

Stable nickel production in Type Ia supernovae: A smoking gun for the progenitor mass?

Autor: S. Blondin, E. Bravo, F. X. Timmes, L. Dessart, D. J. Hillier

Publikováno v: Astronomy and Astrophysics-A&A
Astronomy and Astrophysics-A&A, 2022, 660, pp.A96. ⟨10.1051/0004-6361/202142323⟩

At present, there are strong indications that white dwarf (WD) stars with masses well below the Chandrasekhar limit (MCh ~ 1.4 Msun) contribute a significant fraction of SN Ia progenitors. The relative fraction of stable iron-group elements synthesiz

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ad9204440555b36fd33409e6c718bfc4