Results 111 to 120 of about 17,929 (222)

The Massive Disk Around OH 231.8+4.2

, 2002
We have obtained 11.7 micron and 17.9 micron images at the Keck I telescope of the circumstellar dust emission from OH 231.8+4.2, an evolved mass-losing red giant with a well studied bipolar outflow.
Chen, C., Jura, M., Plavchan, P.
core   +2 more sources

Characterization of Supernovae Interacting with Dense Circumstellar Matter with a Flat Density Profile

The Astrophysical Journal
Interaction between supernova (SN) ejecta and dense circumstellar medium (CSM) with a flat density structure ( ρ ∝ r ^− ^s , s < 1.5) was recently proposed as a possible mechanism behind interacting SNe that exhibit exceptionally long rise times ...
Ryotaro Chiba, Takashi J. Moriya
doaj   +1 more source

Stellar mass loss and the Intra-Cluster Medium in Galactic globular clusters: a deep radio survey for HI and OH

, 2005
We present the results of a survey, the deepest to date, for HI emission at 21 cm and OH emission at 18 cm (lines at 1612, 1665, 1667 and 1720 MHz) in the direction towards the Galactic globular clusters M 15, M 2, NGC 6934, NGC 7006 and Pal 13.
A. Evans, Alves, Bates, Birkinshaw, Blecha, Blitz, Braun, Cohen, Cohen, Côté, Dickey, Dupree, Erik Muller, Evans, Faulkner, Faulkner, Frail, Frank, Freire, Frogel, Frogel, Gerssen, Grindlay, Harris, Heiles, Hesser, Hopwood, Hopwood, Jacco Th. Van Loon, Jacoby, Knapp, Knapp, Knapp, Knapp, Lea, Leon, Lynch, Marshall, Mathewson, McNamara, Odenkirchen, Origlia, Origlia, Origlia, Penny, Pryor, Putman, Ramdani, Rauch, Siegel, Smith, Smith, Smith, Snežana Stanimirović, Stanimirović, Tayler, Van Loon, Webbink   +57 more
core   +1 more source

Supernovae, by Chandra and XMM-Newton

Universe
X-ray emission from supernovae can arise from multiple interactions during their evolution. The immediate explosion is sufficiently energetic to generate X-rays; so, too, is the impact of the shock as it runs into circumstellar matter from earlier mass ...
Eric M. Schlegel
doaj   +1 more source

CO in OH/IR stars close to the Galactic centre

, 2009
Aims: A pilot project has been carried out to measure circumstellar CO emission from three OH/IR stars close to the Galactic centre. The intention was to find out whether it would be possible to conduct a large-scale survey for mass-loss rates using, for
A. Winnberg, Baud, Blommaert, Fix, Frail, H. J. Habing, H. Olofsson, Habing, Heske, J. Nakashima, Knapp, Lindqvist, Lindqvist, Lindqvist, M. J. Reid, Mauersberger, Morris, Nakashima, Olofsson, Ortiz, Ramstedt, Reid, S. Deguchi, Sevenster, Winnberg   +24 more
core   +1 more source

Inferring a Dense Confined Circumstellar Medium around Supernova Progenitors via Long-term Hydrodynamical Evolution

The Astrophysical Journal Letters
Circumstellar interaction of supernova (SN) ejecta is an essential process in its evolution, and observations of SNe have found the signature of circumstellar interaction in both the early and late evolutionary phases of SNe. In this Letter, we show that
Tomoki Matsuoka, Keiichi Maeda, Ke-Jung Chen   +2 more
doaj   +1 more source

JWST Imaging of Edge-on Protoplanetary Disks. I. Fully Vertically Mixed 10 μm Grains in the Outer Regions of a 1000 au Disk

The Astronomical Journal
Scattered light imaging of protoplanetary disks provides key insights on the geometry and dust properties in the disk surface. Here, we present James Webb Space Telescope (JWST) 2–21 μ m images of a 1000 au radius edge-on protoplanetary disk surrounding ...
Gaspard Duchêne, François Ménard, Karl R. Stapelfeldt, Marion Villenave, Schuyler G. Wolff, Marshall D. Perrin, Christophe Pinte, Ryo Tazaki, Deborah L. Padgett   +8 more
doaj   +1 more source

Common Envelope Evolution Leading to Supernovae with Dense Interaction

, 2012
A variety of supernova events, including Type IIn supernovae and ultraluminous supernovae, appear to have lost up to solar masses of their envelopes in 10's to 100's of years leading up to the explosion.
Anderson, Belczynski, Bietenholz, Chevalier, Chugai, Fryer, Germany, Kelly, Kiewe, Livio, Milisavljevic, Miller, Neill, Pastorello, Podsiadlowski, Podsiadlowski, Quataert, Ricker, Schlegel, Smith, Smith, Soker, Tanaka, Zhang   +23 more
core   +1 more source

The Energy Sources, the Physical Properties, and the Mass-loss History of SN 2017dio

The Astrophysical Journal
We study the energy sources, the physical properties of the ejecta and the circumstellar medium (CSM), and the mass-loss history of the progenitor of SN 2017dio, which is a broad-lined Ic (Ic-BL) supernova (SN) having unusual light curves (LCs) and ...
Deng-Wang Shi, Shan-Qin Wang, Wen-Pei Gan, En-Wei Liang   +3 more
doaj   +1 more source

Searching for New Objects with the B[e] Phenomenon

Galaxies
Objects with the B[e] phenomenon, whose defining features are the presence of forbidden emission lines and infrared excess coming from circumstellar dust, represent a broad range of evolutionary stages from pre-main-sequence to planetary nebulae.
Aisha Zh. Naurzbayeva, Nazgul Sh. Alimgazinova, Anatoly S. Miroshnichenko, Corinne Rossi, Inna V. Reva, Raushan I. Kokumbayeva, Chingis T. Omarov, Sergei V. Zharikov, Nadine Manset, Ashish Raj, Arti Joshi, Richard J. Rudy, Richard C. Puetter, Raleigh B. Perry, Kunduz M. Turekhanova   +14 more
doaj   +1 more source