Results 51 to 60 of about 362,838 (268)

Synthetic photometry for carbon-rich giants II. The effects of pulsation and circumstellar dust [PDF]

, 2011
Context. Red giant stars approaching the end of the evolutionary phase of the asymptotic giant branch (AGB) are, inter alia, characterised by (i) pulsations of the stellar interiors; and (ii) the development of dusty stellar winds.
W. Nowotny, B. Aringer, S. Hofner, M. Lederer   +3 more
semanticscholar   +1 more source

An Infrared Study of the Circumstellar Material Associated with the Carbon Star R Sculptoris [PDF]

, 2017
The asymptotic giant branch (AGB) star R Sculptoris (R Scl) is one of the most extensively studied stars on the AGB. R Scl is a carbon star with a massive circumstellar shell ($M_{shell}\sim 7.3\times10^{-3}~M_{\odot}$) which is thought to have been ...
Hankins, Matthew J., Herter, Terry L., Lau, Ryan M., Maercker, Matthias, Sloan, Gregory C.   +4 more
core   +3 more sources

A Submillimeter View of Circumstellar Dust Disks in ρ Ophiuchi [PDF]

, 2007
We present new multiwavelength submillimeter continuum measurements of the circumstellar dust around 48 young stars in the ρ Ophiuchi dark clouds.
S. Andrews, Jonathan P. Williams
semanticscholar   +1 more source

A Spitzer Survey for Dust in Type IIn Supernovae [PDF]

, 2011
Recent observations suggest that Type IIn supernovae (SNe IIn) may exhibit late-time (>100 days) infrared (IR) emission from warm dust more than other types of core-collapse SNe.
Alexei V. Filippenko, Alicia M. Soderberg, Andrews, Andrews, Blanc, Blondin, Blondin, Bode, Boles, Carlo, Challis, Chandra, Chandra, Chandra, Chandra, Chugai, Chugai, Dahlén, Drake, Dwek, Elias, Fazio, Fesen, Fox, Fox, Fransson, Gal-Yam, Garnavich, Gerardy, Graham, Herter, Hildebrand, Immler, Immler, Immler, Itagaki, Jeffrey M. Silverman, Kiewe, Kotak, Kotak, Kotak, Kozasa, Langer, Lee, Lewis, Li, Luckas, Maeder, Maeder, Markwardt, Marsden, Matheson, Matsuura, Meikle, Meikle, Meikle, Meikle, Merrill, Michael F. Skrutskie, Milisavljevic, Miller, Miller, Miller, Modjaz, Mohan Ganeshalingam, Nakano, Nakar, Nathan Smith, Nozawa, Nozawa, Ori D. Fox, Pignata, Prasad, Prasad, Prasad, Prieto, Quimby, Rest, Roger A. Chevalier, Schaller, Schlegel, Silverman, Smith, Smith, Smith, Smith, Smith, Smith, Smith, Smith, Smith, Smith, Soderberg, Steele, Stritzinger, Sugerman, Telesco, Thea N. Steele, Thompson, Thrasher, Tsvetkov, Williams   +101 more
core   +3 more sources

Large dust particles in disks around T Tauri stars

, 2005
We present 7-mm continuum observations of 14 low-mass pre-main-sequence stars in the Taurus-Auriga star-forming region obtained with the Very Large Array with ~1.5" resolution and ~0.3 mJy rms sensitivity.
Adams, Adams, Altenhoff, Beckwith, Beckwith, Beckwith, C. J. Chandler, Calvet, Carpenter, Cernicharo, Cohen, Cohen, Cohen, D. J. Wilner, Draine, Dutrey, Dutrey, Duvert, Elias, Ghez, Guilloteau, Güdel, Haisch, Handa, Hartmann, Henning, Henning, Hildebrand, J. Rodmann, Jensen, Kenyon, Kenyon, Kitamura, Koerner, Koerner, Koerner, L. G. Mundy, Laor, Leinert, Loinard, Looney, Mannings, Mathieu, Mathieu, Mezger, Mitchell, Mundt, Mutschke, Najita, Natta, Ohashi, Olnon, Ossenkopf, Panagia, Prato, Rodriguez, Simon, Strom, Testi, Testi, Th. Henning, Weaver, Wilner, Wilner, Wilner, Wilner, Wright   +66 more
core   +1 more source

Thirty years of SN 1980K: Evidence for light echoes [PDF]

, 2012
We report optical and mid-infrared photometry of SN 1980K between 2004 and 2010, which show slow monotonic fading consistent with previous spectroscopic and photometric observations made 8 to 17 years after outburst.
Andrews, Jennifer E., Barlow, Michael J., Clayton, Geoffrey C., Ercolano, Barbara, Ghavamian, Parviz, Kennicutt Jr., Robert C., Krause, Oliver, Meixner, Margaret, Otsuka, Masaaki, Sugerman, Ben E. K.   +9 more
core   +1 more source

Circumstellar dust as a solution to the red supergiant supernova progenitor problem [PDF]

, 2011
We investigate the red supergiant problem, the apparent dearth of Type IIP supernova progenitors with masses between 16 and 30M⊙. Although red supergiants with masses in this range have been observed, none have been identified as progenitors in pre ...
J. Walmswell, J. Eldridge
semanticscholar   +1 more source

Dust-forming molecules in VY Canis Majoris (and Betelgeuse)

, 2013
The formation of inorganic dust in circumstellar environments of evolved stars is poorly understood. Spectra of molecules thought to be most important for the nucleation, i.e.
Brunken, S., Gottlieb, C. A., Kaminski, T., McCarthy, M. C., Menten, K. M., Muller, H. S. P., Patel, N. A., Schmidt, M. R., Winters, J. M., Young, K. H.   +9 more
core   +1 more source

Sublimation temperature of circumstellar dust particles and its importance for dust ring formation [PDF]

, 2011
Dust particles in orbit around a star drift toward the central star by the Poynting-Robertson effect and pile up by sublimation. We analytically derive the pile-up magnitude, adopting a simple model for optical cross sections.
H. Kobayashi, H. Kimura, Sei‐ichiro Watanabe, Tetsuo Yamamoto, S. Mueller   +4 more
semanticscholar   +1 more source

A Coronagraphic Pilot Study of the Circumstellar Environments around Red Supergiants: CD -31°4916’s Dust Morphology

The Astronomical Journal
Many mechanisms have been proposed to contribute to massive-star mass loss, but in general little is known about the physics involved. Studies of circumstellar environments around massive stars might help to determine which mechanisms are the most common.
Jamie R. Lomax, Emily M. Levesque, John P. Wisniewski, John H. Debes   +3 more
doaj   +1 more source