Results 81 to 90 of about 362,838 (268)

A dusty pinwheel nebula around the massive star WR 104 [PDF]

, 1999
Wolf-Rayet (WR) stars are luminous massive blue stars thought to be immediate precursors to the supernova terminating their brief lives. The existence of dust shells around such stars has been enigmatic since their discovery some 30 years ago; the ...
AF Moffat, AV Torres, CA Haniff, DA Allen, DS Sivia, HM Dyck, I Lundstrom, ID Howarth, John D. Monnier, JP Cassinelli, K Rochowicz, KA van der Hucht, M Cohen, PA Crowther, Peter G. Tuthill, PG Tuthill, PM Veen, PM Williams, PM Williams, PM Williams, R Walder, SF Gull, VG Zubko, VV Usov, William C. Danchi   +24 more
core   +2 more sources

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

Radiative Pressure on Fractal Dust Grains in Oxygen-rich AGB Stars

The Astrophysical Journal
There is still considerable debate on the exact composition of grains formed in the outflows of O-rich, asymptotic giant branch stars. Estimates of the expected condensation distances based on radiative transfer calculations show that iron-free silicates
Frank T. Ferguson, Joseph A. Nuth, John A. Paquette   +2 more
doaj   +1 more source

First 3-D grid-based gas-dust simulations of circumstellar disks with an embedded planet [PDF]

, 2021
Fabian Binkert, J. Szulágyi, T. Birnstiel   +2 more
openalex   +1 more source

AKARI Mission Program: Excavating Mass Loss History in Extended Dust Shells of Evolved Stars (MLHES) I. Far-IR Photometry

, 2018
We performed a far-IR imaging survey of the circumstellar dust shells of 144 evolved stars as a mission programme of the AKARI infrared astronomical satellite using the Far-Infrared Surveyor (FIS) instrument.
Izumiura, Hideyuki, Takita, Satoshi, Tomasino, Rachael L., Torres, Andrew J., Ueta, Toshiya, Yamamura, Issei   +5 more
core   +1 more source

SN 2007od: A Type IIP SN with Circumstellar Interaction [PDF]

, 2010
SN 2007od exhibits characteristics that have rarely been seen in a Type IIP supernova (SN). Optical V band photometry reveals a very steep brightness decline between the plateau and nebular phases of ~4.5 mag, likely due to SN 2007od containing a low ...
B. E. K. Sugerman, B. Ercolano, Barbon, Blondin, Couderc, D. L. Welch, Dwek, Fox, Fransson, Geoffrey C. Clayton, Gerardy, Hanner, Immler, Immler, Immler, J. Clem, J. E. Andrews, J. Fabbri, J. P. Chatelain, J. S. Gallagher, Kasen, Kotak, Kozasa, Landolt, Leonard, Lucy, M. J. Barlow, M. Meixner, Meikle, Mikuz, Pooley, R. Wesson, Smith, Smith, Sollerman, Sugerman, Welch   +36 more
core   +3 more sources

A STUDY OF MASS LOSS AND DUST FORMATION NEAR HOT STARS

Odessa Astronomical Publications, 2016
At present dust formation is well studied only near cool stars, whose surface temperatures are close to those of dust sublimation. Hot stars need to supply large amounts of circumstellar material to allow dust formation around them.
K. S. Kuratov, A. S. Miroshnichenko, A. V. Kusakin, N. Sh. Alimgazinova, A. Zh. Nuryzbaeva, A. B. Manapbaeva, A. K. Kuratova   +6 more
doaj   +1 more source

JWST imaging of the closest globular clusters—I. Possible infrared excess among white dwarfs in NGC 6397

Astronomische Nachrichten, Volume 345, Issue 6-7, July-August 2024.
Abstract We present James Webb Space Telescope observations of the globular cluster NGC 6397 and use them to extend to infrared wavelengths the characterization of the cluster's entire white dwarf (WD) cooling sequence (CS). The data allows us to probe fundamental astrophysical WD properties and to search for evidence in their colors for (or against ...
L. R. Bedin, D. Nardiello, M. Salaris, M. Libralato, P. Bergeron, A. J. Burgasser, D. Apai, M. Griggio, M. Scalco, J. Anderson, R. Gerasimov, A. Bellini   +11 more
wiley   +1 more source

Hidden metallic iron in amorphous silicate dust?

Astronomy & Astrophysics
Context. Amorphous silicate dust is a major component in the interstellar and circumstellar dust formed in the outflow of asymptotic giant branch (AGB) stars.
Enomoto H., Takigawa A., Chihara H., Koike C.   +3 more
doaj   +1 more source

AKARI observations of circumstellar dust in the globular clusters NGC 104 and NGC 362 [PDF]

, 2007
We report on preliminary results of AKARI observations of two globular clusters, NGC 104 and NGC 362. Imaging data covering areas of about 10×10 arcmin 2 centered on the two clusters were obtained with the Infrared Camera (IRC) at 2.4, 3.2, 4.1, 7.0, 9.0,
Y. Ita, T. Tanabé, N. Matsunaga, Y. Nakada, M. Matsuura, T. Onaka, H. Matsuhara, T. Wada, N. Fujishiro, D. Ishihara, H. Kataza, Woojung Kim, T. Matsumoto, H. Murakami, Y. Ohyama, F. Usui, S. Oyabu, I. Sakon, T. Takagi, K. Uemizu, M. Ueno, H. T. I. O. Space, Astronautical Science, Japan Aerospace Exploration Agency, Kanagawa, J. I. O. Astronomy, Graduate School of Science, T. U. O. Tokyo, Tokyo, Japan Japan, Mitaka, J. I. O. Astronomy, J. D. O. Physics, Japan Science, Astronomy, Graduate School of Arts, Sciences, Japan Office of Space Applications, Ibaraki, Japan.   +39 more
semanticscholar   +1 more source