Results 91 to 100 of about 2,154,904 (218)

Signs of a faint disc population at polluted white dwarfs [PDF]

, 2014
Observations of atmospheric metals and dust discs around white dwarfs provide important clues to the fate of terrestrial planetary systems around intermediate-mass stars.
Rocchetto, M, Dufour, P, Farihi, J, Bergfors, C   +3 more
core  

Observations of circumstellar disks

, 2010
In this review I will present recent results obtained between 2005, which was the last “Be-stars” meeting in Sapporo, and 2010, on the observations of circumstellar disks around active hot stars.
Philippe Stee
core   +1 more source

Gas-phase Molecules in Protoplanetary Nebulae with the 21 μm Emission Feature. II. Carbon Monosulfide

The Astronomical Journal
The carrier of the 21 μ m emission feature discovered in a handful of protoplanetary nebulae (PPNe) is one of the most intriguing enigmas in circumstellar chemistry.
Jian-Jie Qiu, Yong Zhang, Deng-Rong Lu, Zheng-Xue Chang, Jiang-Shui Zhang, Xiao-Hu Li, Xin-Di Tang, Yisheng Qiu, Jun-ichi Nakashima, Lan-Wei Jia   +9 more
doaj   +1 more source

The Enigmatic, Highly Variable, High-Mass Young Stellar Object Mol 12: A New Extreme Herbig Be (Proto)star

Galaxies
We report new medium-resolution spectroscopy covering the wavelength range from 0.6 to 2.4 μm, as well as multi-epoch, multi-wavelength photometry, of the Class I high-mass embedded young stellar object Mol 12 (IRAS 05373+2349). It is embedded (AV≃12) in
Mauricio Tapia, Paolo Persi, Jesús Hernández, Nuria Calvet   +3 more
doaj   +1 more source

Massive stars: the pre-supernova evolution of internal and circumstellar structure

, 1998
We review new developments in the theory of massive stars and their circumstellar environments, considering the evolution from the main sequence to the supernova explosion.
Heger, A. (Max-Planck-Institut fuer Astrophysik, Garching (Germany)), Garcia-Segura, G. (Universidad Nacional Autonoma de Mexico, Mexico City (Mexico). Inst. de Astronomia), Langer, N. (Potsdam Univ. (Germany). Inst. fuer Physik), Max-Planck-Institut fuer Astrophysik, Garching (Germany)   +3 more
core  

Extreme Debris Disks: Insights into Violent Collisions in Planet Formation and Destruction

The Astrophysical Journal
Debris disks are dusty structures around mature stars, primarily identified by infrared excesses in the stellar spectra. A subset, known as extreme debris disks (EDDs), exhibits stochastic infrared variability, believed to result from large-scale violent
Kate Y. L. Su, Attila Moór, Ágnes Kóspál, George H. Rieke, Antranik A. Sefilian, Renu Malhotra, Ilaria Pascucci, Alan P. Jackson, Péter Ábrahám, Nicholas P. Ballering   +9 more
doaj   +1 more source

The delay of shock breakout due to circumstellar material evident in most type II supernovae [PDF]

, 2018
International audienceType II supernovae (SNe II) originate from the explosion of hydrogen-rich supergiant massive stars. Their first electromagnetic signature is the shock breakout (SBO), a short-lived phenomenon that can last for hours to days ...
Estévez, P., Huentelemu, P., Clocchiatti, A, Maureira, JC, Cabrera Vives, G., Vivas, A.K., Fraser, Morgan, Estévez, P. A., Olivares E., F., Vivas, A., Olivares E, F, Reyes, I, Fraser, M, Pignata, Giuliano, Martín, J. San, Jaeger, T., Ashall, Chris, Walton, N.A., Walton, N., de Ugarte Postigo, Antonio de, Huentelemu, P, Gonzalez-Gaitan, S, Förster, F., Maureira, J. C., Graefener, G, de Postigo, A., Gal-Yam, Avishay, Smith, RC, Walton, NA, Yoon, S. -C., De Ugarte Postigo, A., de Jaeger, T., Anderson, J., Huijse, P., Estevez, PA, Gal-Yam, A, Bufano, F, Vera, E., Postigo, A. D., de Jaeger, T, Bufano, F., Anderson, J.P., Ashall, C, Hsiao, E. Y., Medina, G, Mazzali, PA, Razza, A., Maureira, J., Pignata, G, Anderson, JP, Yoon, S.-C., Maureira, J.C., Yoon, S., Vivas, A. K., Medina, G., Mazzali, Paolo A., Gal-Yam, A., Martínez, J., Pignata, G., Smith, R.C., Vera, E, Hamuy, M, Reyes, I., E., F., Hsiao, E.Y., Martín, J., González-Gaitán, Santiago, Mazzali, P.A., Huijse, P, Mazzali, P. A., Young, D.R., Le Guillou, L., Mazzali, P., Yoon, S-C, Anderson, Joseph P., Galbany, Lluís, González -Gaitán, S., Kankare, E, Clocchiatti, A., Ashall, C., Moriya, T. J., San Martín, J., Kuncarayakti, H, González-Gaitán, S., BUFANO, FILOMENA, Olivares, F., Yoon, S. C., Walton, N. A., Förster, Francisco, Fraser, M., Hsiao, E., Smith, R. C., Guillou, L. Le, Estévez, P.A., Kuncarayakti, H., Martinez, J, Smith, R., Young, D., Le Guillou, L, Galbany, L., Moriya, T., Forster, F, de Ugarte Postigo, A, Clocchiatti, Alejandro, Young, D. R., Gräfener, G., Young, DR, Cabrera-Vives, G, Galbany, L, Blinnikov, S., Anderson, J. P., Kuncarayakti, Hanindyo, Razza, A, San Martin, J, Hamuy, M., Blinnikov, S, Cabrera-Vives, G., Moriya, T.J., Vivas, AK, Moriya, TJ, Le Guillou, Laurent, Kankare, E., Hsiao, EY   +122 more
core   +1 more source

SN 2024abvb: A Type Icn Supernova in the Outskirts of Its Host Galaxy

The Astrophysical Journal
We present multiband photometric and spectroscopic observations of supernova (SN) 2024abvb, which exhibits early-time prominent photoionized narrow emission lines of C II superposed on a blue continuum.
Maokai Hu, Shengyu Yan, Xiaofeng Wang, Abdusamatjan Iskandar, Jujia Zhang, Liping Li, Ali Esamdin, Letian Wang, Lingzhi Wang, Alexei V. Filippenko, Thomas G. Brink, Liyang Chen, Ruifeng Huang, Lifan Wang   +13 more
doaj   +1 more source

Modeling the circumstellar interaction around SN 2004gq

Context. The relationship between the mass-loss history and final evolutionary stage of massive stars and the properties of the observable supernova (SN) is still under debate.
B. H. Pál, A. P. Nagy, T. Szalai
core   +1 more source

Simulating the birth environment of circumstellar discs [PDF]

, 2021
Circumstellar discs are the reservoirs of gas and dust that surround young stars and have the potential to become planetary systems. Their evolution will determine the time and material available to form planets.
Concha Ramirez, F.A.
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