Results 21 to 30 of about 25,802 (223)

Early gray dust formation in the type IIn SN 2005ip [PDF]

, 2018
The physical characteristics of dust formed in supernovae is poorly known. In this paper, we investigate the extinction properties of dust formed in the type IIn SN 2005ip.
Gall, Christa, Hjorth, Jens, Nielsen, Ann-Sofie Bak   +2 more
core   +3 more sources

RR Tel: Determination of Dust Properties During Minimum Obscuration

Open Astronomy, 2012
the ISO infrared spectra and the SAAO long-term JHKL photometry of RR Tel in the epochs during minimum obscuration are studied in order to construct a circumstellar dust model.
Jurkić T., Kotnik-Karuza D.
doaj   +1 more source

Sudden Extreme Obscuration of a Sun-like Main-sequence Star: Evolution of the Circumstellar Dust around ASASSN-21qj

The Astrophysical Journal, 2023
ASASSN-21qj is a distant Sun-like star that recently began an episode of deep dimming events after no prior recorded variability. Here we examine archival and newly obtained optical and near-infrared data of this star.
Jonathan P. Marshall, Steve Ertel, Francisca Kemper, Carlos del Burgo, Gilles P. P. L. Otten, Peter Scicluna, Sascha T. Zeegers, Álvaro Ribas, Oscar Morata   +8 more
doaj   +1 more source

Investigating planet formation in circumstellar disks: CARMA observations of RY Tau and DG Tau [PDF]

, 2010
(Abridged) We present CARMA observations of the thermal dust emission from the circumstellar disks around the young stars RYTau and DGTau at wavelengths of 1.3mm and 2.8mm.
Akeson, Andrea Isella, Andrews, Anneila I. Sargent, Bertout, Brown, Brown, Bryden, Calvet, Chiang, Dullemond, Guilloteau, Hartmann, Herbig, Hughes, Hughes, Isella, John M. Carpenter, Lin, Lynden-Bell, Muzerolle, Pott, Robitaille, Shakura, Simon, St-Onge, Weingartner, Wilner, Zubko   +28 more
core   +2 more sources

Dust-to-gas ratio resurgence in circumstellar disks due to the formation of giant planets: the case of HD 163296 [PDF]

, 2019
The amount of dust present in circumstellar disks is expected to steadily decrease with age due to the growth from micron-sized particles to planetesimals and planets. Mature circumstellar disks, however, can be observed to contain significant amounts of
Marzari, F., Polychroni, D., Testi, L., Turrini, D.   +3 more
core   +2 more sources

Coagulation–Fragmentation Equilibrium for Charged Dust: Abundance of Submicron Grains Increases Dramatically in Protoplanetary Disks

The Astrophysical Journal, 2023
Dust coagulation in protoplanetary disks is not straightforward and is subject to several slowdown mechanisms, such as bouncing, fragmentation, and radial drift to the star.
Vitaly Akimkin, Alexei V. Ivlev, Paola Caselli, Munan Gong, Kedron Silsbee   +4 more
doaj   +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

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

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 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