Results 131 to 140 of about 2,618 (181)

Reconciling the Tension between Light-curve Modeling of Type II Supernovae and Neutrino-driven Core-collapse Supernovae Models with Late-phase Spectroscopy

The Astrophysical Journal
Type II supernovae (SNe II) are the most frequently observed outcome of core-collapse explosions and provide a valuable window into the physical mechanisms governing the deaths of massive stars. However, estimates of explosion properties based on optical
Qiliang Fang, Hiroki Nagakura, Takashi J. Moriya   +2 more
doaj   +1 more source

The Type II SN 2025pht in NGC 1637: A Red Supergiant with Carbon-rich Circumstellar Dust as the First JWST Detection of a Supernova Progenitor Star

The Astrophysical Journal Letters
We present follow-up imaging and spectroscopy and pre-explosion imaging of SN 2025pht located in NGC 1637 at 12 Mpc. Our spectroscopy shows that SN 2025pht is a Type II supernova (SN) with broad lines of hydrogen and with minimal line-of-sight extinction
Charles D. Kilpatrick, Aswin Suresh, Kyle W. Davis, Maria R. Drout, Ryan J. Foley, Alexander Gagliano, Wynn V. Jacobson-Galán, Ravjit Kaur, Kirsty Taggart, Jason Vazquez   +9 more
doaj   +1 more source

Type Ia supernovae 2014J and 2011fe at the nebular phase [PDF]

, 2020
© 2015, Pleiades Publishing, Inc. We present our observations and the results of our analysis of the nebular spectra for two nearby type Ia supernovae (SN 2014J and SN 2011fe).
Sunyaev R., Sakhibullin N., Galeev A., Akhmetkhanova A., Chugai N., Churazov E., Bikmaev I., Khamitov I.   +7 more
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SPY - the ESO Supernovae type Ia Progenitor survey [PDF]

, 2003
Supernovae (SNe) mark the violent termination of a star’s life in an explosion. They are classified according to their light curve as type I or II, with the type I SNe producing very similar light curves, while the SNe type II are more diverse ...
Christlieb, N., Drechsel, H., Pauli, E.M., Koester, D., Yungelson, L., Karl, C., Leibundgut, B., Heber, U., Homeier, D., Moehler, S., Nelemans, G., Renzini, A., Marsh, T.R., Napiwotzki, R., Hagen, H.J., Reimers, D.   +15 more
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JWST Observations of SN 2023ixf. I. Completing the Early Multiwavelength Picture with Plateau-phase Spectroscopy

The Astrophysical Journal
We present and analyze panchromatic (0.35–14 μ m) spectroscopy of the Type II supernova 2023ixf, including near- and mid-infrared spectra obtained 33.6 days after explosion during the plateau phase, with the James Webb Space Telescope (JWST). This is the
J. M. DerKacy, C. Ashall, E. Baron, K. Medler, T. Mera, P. Hoeflich, M. Shahbandeh, C. R. Burns, M. D. Stritzinger, M. A. Tucker, B. J. Shappee, K. Auchettl, C. R. Angus, D. D. Desai, A. Do, J. T. Hinkle, W. B. Hoogendam, M. E. Huber, A. V. Payne, D. O. Jones, J. Shi, M. Y. Kong, S. Romagnoli, A. Syncatto, S. Moran, E. Fereidouni, P. J. Brown, M. Engesser, O. D. Fox, L. Galbany, E. Y. Hsiao, T. de Jaeger, S. Kumar, J. Lu, M. Matsuura, P. A. Mazzali, N. Morrell, C. M. Pfeffer, M. M. Phillips, A. Rest, S. Shiber, L. Strolger, N. B. Suntzeff, T. Temim, S. Tinyanont, Q. Wang, R. Wesson, S. H. Park, J. Rho   +48 more
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NEOWISE-R Caught the Luminous SN 2023ixf in Messier 101

The Astrophysical Journal
During routine survey imaging, the reactivated Near-Earth Object Wide-field Infrared Survey Explorer (NEOWISE-R) serendipitously caught the Type II supernova SN 2023ixf in Messier 101 on the rise, starting day 3.6 through day 10.9, and again on the ...
Schuyler D. Van Dyk, Tamás Szalai, Roc M. Cutri, J. Davy Kirkpatrick, Carl J. Grillmair, Sergio B. Fajardo-Acosta, Joseph R. Masiero, Amy K. Mainzer, Christopher R. Gelino, József Vinkó, András Péter Joó, András Pál, Réka Könyves-Tóth, Levente Kriskovics, Róbert Szakáts, Krisztián Vida, WeiKang Zheng, Thomas G. Brink, Alexei V. Filippenko   +18 more
doaj   +1 more source

Type Ia supernovae 2014J and 2011fe at the nebular phase [PDF]

, 2015
© 2015, Pleiades Publishing, Inc. We present our observations and the results of our analysis of the nebular spectra for two nearby type Ia supernovae (SN 2014J and SN 2011fe).
Sunyaev R., Sakhibullin N., Galeev A., Akhmetkhanova A., Chugai N., Churazov E., Bikmaev I., Khamitov I.   +7 more
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Discovery of a Likely Type II Supernova at z = 3.6 with JWST

The Astrophysical Journal
Transient astronomy of the early, high-redshift ( z  > 3) Universe is an unexplored regime that offers the possibility of probing the first stars and the epoch of reionization.
D. A. Coulter, J. D. R. Pierel, C. DeCoursey, T. J. Moriya, M. R. Siebert, B. A. Joshi, M. Engesser, A. Rest, E. Egami, M. Shahbandeh, W. Chen, O. D. Fox, L. G. Strolger, Y. Zenati, A. J. Bunker, P. A. Cargile, M. Curti, D. J. Eisenstein, S. Gezari, S. Gomez, M. Guolo, K. Hainline, J. Jencson, B. D. Johnson, M. Karmen, R. Maiolino, R. M. Quimby, P. Rinaldi, B. Robertson, S. Tacchella, F. Sun, Q. Wang, T. Wevers   +32 more
doaj   +1 more source

Analysis of 14 Years of X-Ray Emission from SN 2011DH

Universe
Ejecta from core-collapse supernovae interact with the circumstellar medium shed by the progenitor star, producing X-ray emission. Previous studies analyzed the X-ray spectrum of the Type IIb supernova SN 2011dh up to ∼500 days after explosion. Long-term
Elisa J. Gao, Vikram V. Dwarkadas
doaj   +1 more source

The rise-time of Type II supernovae [PDF]

, 2019
We investigate the early-time light curves of a large sample of 223 Type II supernovae (SNe II) from the Sloan Digital Sky Survey and the Supernova Legacy Survey.
Jaeger, Thomas de, Carlberg, R., Sullivan, M., Tominaga, N., Galbany, L., Hamuy, M., González Gaitán, Santiago, Anderson, Joseph P., Bersten, Melina Cecilia, Gutierrez, Claudia, Pignata, Giuliano, Bufano, Filomena, Molina, J., Howell, D.A., Förster, Francisco, Baklanov, Petr V., Blinnikov, S. I.   +16 more
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