Zobrazeno 1 - 10
of 29
pro vyhledávání: '"Nielsen, Krister"'
Eta Carinae: an evolving view of the central binary, its interacting winds and its foreground ejecta
Autor:
Gull, Theodore R., Hillier, D. John, Hartman, Henrik, Corcoran, Michael F., Damineli, Augusto, Espinoza-Galeas, David, Hamaguchi, Kenji, Navarete, Felipe, Nielsen, Krister, Madura, Thomas, Moffat, Anthony F. J., Morris, Patrick, Richardson, Noel D., Russell, Christopher M. P., Stevens, Ian R., Weigelt, Gerd
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 has increased nearly ten-fold which has led to increased ionization of
Externí odkaz:
http://arxiv.org/abs/2205.15116
Autor:
Rau, Gioia, Montez Jr., Rodolfo, Carpenter, Kenneth G., Wittkowski, Markus, Bladh, Sara, Karovska, Margarita, Airapetian, Vladimir, Ayres, Tom, Boyer, Martha, Chiavassa, Andrea, Clayton, Geoffrey, Danchi, William, De Marco, Orsola, Dupree, Andrea K., Kaminski, Tomasz, Kastner, Joel H., Kerschbaum, Franz, Linsky, Jeffrey, Lopez, Bruno, Monnier, John, Montargès, Miguel, Nielsen, Krister, Ohnaka, Keiichi, Ramstedt, Sofia, Roettenbacher, Rachael, Brummelaar, Theo ten, Paladini, C., Sarangi, Arkaprabha, van Belle, Gerard, Ventura, Paolo
Cool, evolved stars are the main source of chemical enrichment of the interstellar medium (ISM), and understanding their mass loss and structure offers a unique opportunity to study the cycle of matter in the Universe. Pulsation, convection, and othe
Externí odkaz:
http://arxiv.org/abs/1903.04585
Autor:
Carpenter, Kenneth G., Nielsen, Krister E., Kober, Gladys V., Ayres, Thomas R., Wahlgren, Glenn M., Rau, Gioia
The HST Treasury Program "Advanced Spectral Library Project: Cool Stars" was designed to collect representative, high quality ultraviolet spectra of eight evolved F-M type cool stars. The Space Telescope Imaging Spectrograph (STIS) echelle spectra of
Externí odkaz:
http://arxiv.org/abs/1811.11865
The photon-scattering winds of M-giants absorb parts of the chromospheric emission lines and produce self-reversed spectral features in high resolution {\it HST}/GHRS spectra. These spectra provide an opportunity to assess fundamental parameters of t
Externí odkaz:
http://arxiv.org/abs/1811.10679
Autor:
Morris, Patrick W., Gull, Theodore R., Hillier, D. John, Barlow, M. J., Royer, Pierre, Nielsen, Krister, Black, John, Swinyard, Bruce
Publikováno v:
ApJ, 842, 79 (2017)
Infrared observations of the dusty, massive Homunculus Nebula around the luminous blue variable $\eta$ Carinae are crucial to characterize the mass-loss history and help constrain the mechanisms leading to the Great Eruption. We present the 2.4 - 670
Externí odkaz:
http://arxiv.org/abs/1706.05112
Autor:
Groh, Jose H., Nielsen, Krister E., Damineli, Augusto, Gull, Theodore R., Madura, Thomas I., Hillier, D. J., Teodoro, Mairan, Driebe, Thomas, Weigelt, Gerd, Hartman, Henrik, Kerber, Florian, Okazaki, Atsuo T., Owocki, Stan P., Millour, Florentin, Murakawa, Koji, Kraus, Stefan, Hofmann, Karl-Heinz, Schertl, Dieter
We report near-IR spectroscopic observations of the Eta Carinae massive binary system during 2008-2009 using VLT/CRIRES. We detect a strong, broad absorption wing in He I 10833 extending up to -1900 km/s across the 2009.0 spectroscopic event. Archiva
Externí odkaz:
http://arxiv.org/abs/1003.4527
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Autor:
Hamaguchi, Kenji, Corcoran, Michael F., Gull, Theodore, Ishibashi, Kazunori, Pittard, Julian M., Hillier, D. John, Damineli, Augusto, Davidson, Kris, Nielsen, Krister E., Kober, Gladys Vieira
Publikováno v:
Astrophys.J.663:522-542,2007
We report the results of an X-ray observing campaign on the massive, evolved star Eta Carinae, concentrating on the 2003 X-ray minimum as seen by the XMM-Newton observatory. These are the first spatially-resolved X-ray monitoring observations of the
Externí odkaz:
http://arxiv.org/abs/astro-ph/0702409
Akademický článek
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