Zobrazeno 1 - 10
of 54
pro vyhledávání: '"Speck, Angela K."'
Autor:
De Marco, Orsola, Akashi, Muhammad, Akras, Stavros, Alcolea, Javier, Aleman, Isabel, Amram, Philippe, Balick, Bruce, De Beck, Elvire, Blackman, Eric G., Boffin, Henri M. J., Boumis, Panos, Bublitz, Jesse, Bucciarelli, Beatrice, Bujarrabal, Valentin, Cami, Jan, Chornay, Nicholas, Chu, You-Hua, Corradi, Romano L. M., Frank, Adam, Garcia-Segura, Guillermo, Garcia-Hernandez, D. A., Garcia-Rojas, Jorge, Gomez-Llanos, Veronica, Goncalves, Denise R., Guerrero, Martin A., Jones, David, Karakas, Amanda I., Kastner, Joel H., Kwok, Sun, Lykou, Foteini, Manchado, Arturo, Matsuura, Mikako, McDonald, Iain, Monreal-Ibero, Ana, Monteiro, Hektor, Baez, Paula Moraga, Morisset, Christophe, Miszalski, Brent, Mohamed, Shazrene S., Montez Jr., Rodolfo, Nordhaus, Jason, de Oliveira, Claudia Mendes, Osborn, Zara, Otsuka, Masaaki, Parker, Quentin A., Peeters, Els, Quint, Bruno C., Quintana-Lacaci, Guillermo, Redman, Matt, Ruiter, Ashley J., Sabin, Laurence, Contreras, Carmen Sanchez, Santander-Garcia, Miguel, Seitenzahl, Ivo, Sahai, Raghvendra, Soker, Noam, Speck, Angela K., Stanghellini, Letizia, Steffen, Wolfgang, Toala, Jesus A., Ueta, Toshiya, Van de Steene, Griet, Villaver, Eva, Ventura, Paolo, Vlemmings, Wouter, Walsh, Jeremy R., Wesson, Roger, van Winckel, Hans, Zijlstra, Albert A.
Publikováno v:
Nature Astronomy, 2022, Vol. 6, p. 1421
Planetary nebulae (PNe), the ejected envelopes of red giant stars, provide us with a history of the last, mass-losing phases of 90 percent of stars initially more massive than the Sun. Here, we analyse James Webb Space Telescope (JWST) Early Release
Externí odkaz:
http://arxiv.org/abs/2301.02775
Autor:
Shepard, Lisa M., Speck, Angela K.
Asymptotic Giant Branch (AGB) stars are major contributors of cosmic dust to the universe. Typically, dust around AGB stars is investigated via radiative transfer (RT) modeling, or via simple deconstruction of observed spectra. However, methodologies
Externí odkaz:
http://arxiv.org/abs/2107.07447
We present a laboratory study of silicate glasses of astrophysically relevant compositions including olivines, pyroxenes and melilites. With emphasis on the classic Si-O stretching feature near 10 microns, we compare infrared spectra of our new sampl
Externí odkaz:
http://arxiv.org/abs/1108.0429
Pulsation is believed to be the leading cause of dusty mass loss from Asymptotic Giant Branch (AGB) stars. We present a temporal study of T Cep, a long-period Mira variable, using seven ISO SWS spectra, covering a 16-month period over a single pulsat
Externí odkaz:
http://arxiv.org/abs/1103.5040
Autor:
Ueta, Toshiya, Stencel, Robert E., Yamamura, Issei, Izumiura, Hideyuki, Nakada, Yoshikazu, Matsuura, Mikako, Ita, Yoshifusa, Tanabe, Toshihiko, Fukushi, Hinako, Matsunaga, Noriyuki, Mito, Hiroyuki, Speck, Angela K.
We report here on the discovery of an extended far-infrared shell around the AGB star, R Cassiopeia, made by AKARI and Spitzer. The extended, cold circumstellar shell of R Cas spans nearly 3 arcmin and is probably shaped by interaction with the inter
Externí odkaz:
http://arxiv.org/abs/0905.0750
Autor:
Ueta, Toshiya, Izumiura, Hideyuki, Yamamura, Issei, Stencel, Robert E., Nakada, Yoshikazu, Matsuura, Mikako, Ita, Yoshifusa, Tanabe, Toshihiko, Fukushi, Hinako, Matsunaga, Noriyuki, Mito, Hiroyuki, Speck, Angela K.
Recent far-infrared mapping of mass-losing stars by the AKARI Infrared Astronomy Satellite and Spitzer Space Telescope have suggested that far-infrared bow shock structures are probably ubiquitous around these mass-losing stars, especially when these
Externí odkaz:
http://arxiv.org/abs/0905.0756
Publikováno v:
Astrophys.J.691:1202-1221,2009
Infrared carbon stars without visible counterparts are generally known as extreme carbon stars. We have selected a subset of these stars with absorption features in the 10-13 $\mu$m range, which has been tentatively attributed to silicon carbide (SiC
Externí odkaz:
http://arxiv.org/abs/0810.2599
Since their discovery, cosmic crystalline silicates have presented several challenges to understanding dust formation and evolution. The mid-infrared spectrum of IRAS 17495$-$2534, a highly obscured oxygen-rich asymptotic giant branch (AGB) star, is
Externí odkaz:
http://arxiv.org/abs/0809.3244
Autor:
Wareing, C. J., Zijlstra, Albert A., Speck, Angela K., O'Brien, T. J., Ueta, Toshiya, Elitzur, M., Gehrz, R. D., Herwig, F., Izumiura, H., Matsuura, M., Meixner, M., Stencel, R. E., Szczerba, R.
Publikováno v:
Mon.Not.Roy.Astron.Soc.Lett. 372 (2006) L63-L67
New Spitzer imaging observations have revealed the structure around the Mira variable star R Hya to be a one-sided parabolic arc 100 arcsec to the West stretching from North to South. We successfully model R Hya and its surroundings in terms of an in
Externí odkaz:
http://arxiv.org/abs/astro-ph/0607500
Autor:
Ueta, Toshiya, Speck, Angela K., Meixner, Margaret, Dayal, Aditya, Hora, Joseph L., Fazio, Giovanni G., Deutsch, Lynne K., Hoffmann, William F.
We investigate spatial distributions of specific dust components in the circumstellar shells of a proto-planetary nebula candidate, HD 179821, and a planetary nebula, BD$+30^{\circ}$3639, by means of spectral imaging. With high-resolution ground-base
Externí odkaz:
http://arxiv.org/abs/astro-ph/0010208