Results 101 to 110 of about 3,278,550 (239)

Circumstellar molecular line emission from S-type AGB stars: Mass-loss rates and SiO abundances

, 2009
The main aim is to derive reliable mass-loss rates and circumstellar SiO abundances for a sample of 40 S-type AGB stars based on new multi-transitional CO and SiO radio line observations.
Bieging, Bieging, Chen, Cherchneff, Cotton, Danchi, F. L. Schöier, González Delgado, Groenewegen, Groenewegen, Groenewegen, Groenewegen, H. Olofsson, Huggins, Höfner, Höfner, Ivezic, Jorissen, Jura, Justtanont, Kahane, Knapp, Kwok, Lindqvist, Nyman, Olofsson, Olofsson, Ramstedt, Ramstedt, Reid, Reid, S. Ramstedt, Sahai, Salpeter, Scalo, Schöier, Schöier, Schöier, Schöier, Schöier, Schöier, Schöier, Stanek, Stephenson, Stephenson, Suh, van der Tak, Volk, Whitelock, Willems, Wing, Woitke, Young   +52 more
core   +1 more source

Circumstellar water vapour in M-type AGB stars: Constraints from H2O(1_10 - 1_01) lines obtained with Odin [PDF]

, 2008
Aims: Spectrally resolved circumstellar H2O(1_10 - 1_01) lines have been obtained towards three M-type AGB stars using the Odin satellite. This provides additional strong constrains on the properties of circumstellar H2O and the circumstellar envelope ...
Aa. Sandqvist, Agúndez, Anders, B. Larsson, Bains, Cernicharo, Cernicharo, Chapman, Cherchneff, Colomer, Danchi, de Graauw, F. L. Schöier, Feast, Flower, Gonzalez Garcia, González Delgado, González-Alfonso, González-Alfonso, Green, H. Olofsson, Habing, Hasegawa, Höfner, Jeong, Justtanont, Justtanont, K. Justtanont, Knapp, M. Maercker, M. Olberg, Maercker, Mamon, Melnick, Melnick, Menten, Menten, Miyoshi, Netzer, Neufeld, Nordh, Olberg, Olofsson, P. Bergman, Phillips, Ramstedt, Reid, Rothman, Ryde, S. Kwok, Schöier, Schöier, Schöier, Schöier, Schöier, Sylvester, Szymczak, Tevousjan, U. Frisk, Willacy, Winters, Wittkowski, Woitke, Zubko, Å. Hjalmarson   +64 more
core   +2 more sources

First direct detection of large polycyclic aromatic hydrocarbons on asteroid (162173) Ryugu samples: An interstellar heritage

Natural Sciences, Volume 4, Issue 4, October 2024.
Large free aromatic species, with up to 61 carbon atoms, were detected in grains of the Ryugu carbonaceous asteroid using ultra‐sensitive two‐step laser mass spectrometry. This discovery confirms the presence of large polycyclic aromatic hydrocarbons in the interstellar medium and provides new information on the formation and evolution of organic ...
Hassan Sabbah, Ghylaine Quitté, Karine Demyk, Christine Joblin   +3 more
wiley   +1 more source

Magnetic fields in circumstellar disks: The potential of Zeeman observations

, 2017
Context. Recent high angular resolution polarimetric continuum observations of circumstellar disks provide new insights into their magnetic field. However, direct constraints are limited to the plane of sky component of the magnetic field.
Brauer, R., Flock, M., Wolf, S.
core   +1 more source

A Multiwavelength ALMA View of Gas and Dust in Binary Protoplanetary System AS 205: Evidence of Dust Asymmetric Distribution

The Astrophysical Journal
We present Atacama Large Millimeter/submillimeter Array observations of multiwavelength dust emissions at 3.1 and 1.3 mm, along with molecular line emissions of CO(2–1), CO(3–2), ^13 CO(3–2), and C ^18 O(3–2) at spatial resolutions of 7–45 au toward the ...
Nguyen Thi Phuong, Nguyen Tat Thang
doaj   +1 more source

Electron microscopy observations of the diversity of Ryugu organic matter and its relationship to minerals at the micro‐ to nano‐scale

Meteoritics &Planetary Science, Volume 59, Issue 8, Page 2023-2043, August 2024.
Abstract Transmission electron microscopy analyses of Hayabusa2 samples show that Ryugu organic matter exhibits a range of morphologies, elemental compositions, and carbon functional chemistries consistent with those of carbonaceous chondrites that have experienced low‐temperature aqueous alteration.
Rhonda M. Stroud, Jens Barosch, Lydie Bonal, Katherine Burgess, George D. Cody, Bradley T. De Gregorio, Luke Daly, Emmanuel Dartois, Elena Dobrică, Jean Duprat, Cecile Engrand, Dennis Harries, Minako Hashiguchi, Hope Ishii, Yoko Kebukawa, A. David Kilcoyne, Falko Langenhorst, Martin R. Lee, Larry R. Nittler, Eric Quirico, Taiga Okumura, Laurent Remusat, Scott Sandford, Hikaru Yabuta, Masanao Abe, Neyda M. Abreu, Paul A. J. Bagot, Pierre Beck, Laure Bejach, Phil A. Bland, John C. Bridges, Brittany A. Cymes, Alexandre Dazzi, Francisco de la Peña, Ariane Deniset‐Besseau, Satomi Enju, Yuma Enokido, David R. Frank, Jennifer Gray, Mitsutaka Haruta, Satoshi Hata, Leon Hicks, Yohei Igami, Damien Jacob, Kanami Kamide, Mutsumi Komatsu, Sylvain Laforet, Hugues Leroux, Corentin Le Guillou, Zita Martins, Maya Marinova, James Martinez, Jérémie Mathurin, Megumi Matsumoto, Toru Matsumoto, Junya Matsuno, Samuel McFadzean, Tatsuhiro Michikami, Itaru Mitsukawa, Akira Miyake, Masaaki Miyahara, Akiko Miyazaki, Gilles Montagnac, Smail Mostefaoui, Tomoki Nakamura, Aiko Nakato, Hiroshi Naraoka, Yusuke Nakauchi, Satoru Nakazawa, Masahiro Nishimura, Takaaki Noguchi, Kenta Ohtaki, Takuji Ohigashi, Tatsuaki Okada, Shota Okumura, Ryuji Okazaki, Thi H. V. Phan, Rolando Rebois, Kanako Sakamoto, Takanao Saiki, Hikaru Saito, Yusuke Seto, Miho Shigenaka, William Smith, Hiroki Suga, Mingqi Sun, Shogo Tachibana, Yoshio Takahashi, Yasuo Takeichi, Akihisa Takeuchi, Aki Takigawa, Yusuke Tamenori, Satoshi Tanaka, Fuyuto Terui, Michelle S. Thompson, Naotaka Tomioka, Akira Tsuchiyama, Yuichi Tsuda, Kentaro Uesugi, Masayuki Uesugi, Tomohiro Usui, Maximilien Verdier‐Paoletti, Daisuke Wakabayashi, Sei‐ichiro Watanabe, Toru Yada, Shohei Yamashita, Masahiro Yasutake, Kasumi Yogata, Makoto Yoshikawa, Hisayoshi Yurimoto, Pierre‐M. Zanetta, Thomas Zega, Michael E. Zolensky   +112 more
wiley   +1 more source

Observing dust settling and coagulation in circumstellar discs: Selected constraints from high resolution imaging

, 2010
Circumstellar discs are expected to be the nursery of planets. Grain growth within such discs is the first step in the planet formation process in the core-accretion gas-capture scenario.
Beckwith, Bjorkman, Blum, Boss, Brauer, Brown, Cuzzi, Draine, Draine, Duchêne, Dullemond, Dullemond, D’Alessio, Garaud, Guilloteau, Gullbring, Güttler, J. Sauter, Kamp, Kemper, Kessler-Silacci, Kim, Lada, Langkowski, Lucy, Mathis, McCabe, Meeus, Mie, Neuhäuser, Ormel, Ossenkopf, Pinte, Przygodda, Robitaille, S. Wolf, Sauter, Schegerer, Schegerer, Shakura, Sicilia-Aguilar, Sicilia-Aguilar, Simon, Stapelfeldt, Stapelfeldt, Thamm, Weidenschilling, Weidling, Weingartner, Wilking, Witt, Wolf, Wolf, Wolf, Wood   +54 more
core   +1 more source

Revisiting the Chemical Composition of WD 1145+017: Impact of Circumstellar Disk Contamination on Photospheric Abundances

The Astrophysical Journal
We performed a chemical analysis of the asteroid-bearing white dwarf WD 1145+017 using optical and ultraviolet spectroscopic data from 25 epochs between 2015 and 2023.
Érika Le Bourdais, Patrick Dufour, Siyi Xu   +2 more
doaj   +1 more source

The composition of circumstellar gas and dust in 51 Oph [PDF]

, 2001
We analyze ISO archive data of the nearby bright emission-line star 51 Oph, previously classied as a proto-planetary system similar to Pic. The infrared spectrum reveals the presence of gas-phase emission bands of hot (850 K) CO, CO2 ,H 2O and NO.
M. V. D. Ancker, M. V. D. Ancker, G. Meeus, J. Cami, L. Waters, L. Waters, C. Waelkens   +6 more
semanticscholar   +1 more source

X-ray emission from radiative shocks in Type II supernovae

, 2005
The X-ray emission from the circumstellar interaction in Type II supernovae with a dense circumstellar medium is calculated. In Type IIL and Type IIn supernovae mass loss rates are generally high enough for the region behind the reverse shock to be ...
Aldrovandi, Arnaud, Arnaud, Borkowski, Borkowski, C. Fransson, C. Kozma, Canizares, Chandra, Chevalier, Chevalier, Chevalier, Chevalier, Chevalier, Chevalier, Chevalier, Chevalier, Chugai, Cox, Dasgupta, Dere, Dopita, Dopita, Dopita, Drake, Fesen, Filippenko, Fox, Fransson, Fransson, Fransson, Fransson, Fryxell, Goldman, Gu, Heger, Houck, Innes, Itoh, Itoh, Itoh, Itoh, Iwamoto, Kaaret, Kaastra, Kifonidis, Kohmura, Landini, Landini, Leising, Lundqvist, Matzner, Mazzotta, Mewe, Meynet, Michael, Nadyozhin, Nahar, Nahar, Nahar, Nomoto, Nomoto, Panagia, Pequignot, Pietsch, Plewa, Plewa, Pooley, Ray, Raymond, Ryder, Salasnich, Schlegel, Schlegel, Shigeyama, Shigeyama, Shull, Sorokina, Sutherland, Sutherland, Sutherland, Suzuki, Swartz, T. K. Nymark, Tarter, Uno, Verner, Woosley, Young, Zatsarinny, Zatsarinny, Zatsarinny, Zimmerman   +92 more
core   +1 more source