Results 1 to 10 of about 48,593 (219)

Spectral modeling of type II supernovae. I. Dilution factors [PDF]

Astronomy & Astrophysics, 2018
We present substantial extensions to the Monte Carlo radiative transfer code TARDIS to perform spectral synthesis for type II supernovae. By incorporating a non-LTE ionization and excitation treatment for hydrogen, a full account of free-free and bound ...
Hillebrandt, W., Kerzendorf, W. E., Noebauer, U. M., Sim, S. A., Vogl, C.   +4 more
core   +5 more sources

Type Ia Supernovae: An Examination of Potential Progenitors and the Redshift Distribution [PDF]

, 1997
We examine the possibility that supernovae type Ia (SN Ia) are produced by white dwarfs accreting from Roche-lobe filling evolved companions, under the assumption that a strong optically thick stellar wind from accretor is able to stabilize the mass ...
Canal R., Cappellaro E., de Kool M., Eggleton P. P., Kahabka P., L. Yungelson, Li X.-D., M. Livio, Madau P., Mochkovich R., Paczynski B., Pastetter L., Refsdal S., Refsdal S., Shaefer B. E., Soberman G. E., Uus U., van den Heuvel E. P. J., Yungelson L.   +18 more
core   +3 more sources

An abundance study of red-giant-branch stars in the Hercules dwarf spheroidal galaxy [PDF]

, 2010
Using high-resolution spectroscopy, we provide a determination of [Fe/H] and [Ca/H] for confirmed red-giant branch member stars of the Hercules dwarf spheroidal galaxy.
A. Koch, Adén, Adén, Alonso, Andrievsky, Aoki, Asplund, Belokurov, Bensby, Burris, Calamida, Calamida, Clem, Cohen, D. Adén, Dotter, E. K. Grebel, Edvardsson, Feltzing, Frebel, Frebel, Fulbright, Fulbright, Geisler, Gilmore, Gratton, Gratton, Gratton, Grebel, Grevesse, Gustafsson, Hanson, Helmi, Ivans, Ivans, Johnson, K. Eriksson, Kirby, Kirby, Kirby, Koch, Koch, Koch, Koch, Kupka, Kupka, Lind, M. I. Wilkinson, Martin, Matteucci, McWilliam, McWilliam, McWilliam, Nissen, Norris, Pasquini, Piskunov, Prochaska, Reddy, Ryabchikova, Ryan, S. Feltzing, Sadakane, Schlegel, Schörck, Shetrone, Shetrone, Simon, Simon, Starkenburg, Stephens, Tollerud, Tolstoy, VandenBerg, Venn, Walker, Woosley, Zucker   +77 more
core   +1 more source

SN 2017hcc and SN 2023usc—A Comparative Spectroscopic Study of Type IIn Supernovae

The Astrophysical Journal
We report on a spectroscopic study of the bright, nearby type IIn supernovae SN 2017hcc and SN 2023usc using data obtained from the Himalayan Chandra Telescope.
V. Sethulakshmi, F. K. Sutaria, R. Sharma, A. Ray   +3 more
doaj   +1 more source

A unique model for the variety of multiple populations formation(s) in globular clusters: a temporal sequence [PDF]

, 2016
We explain the multiple populations recently found in the 'prototype' Globular Cluster (GC) NGC 2808 in the framework of the asymptotic giant branch (AGB) scenario.
D'Antona, F., D'Ercole, A., Marino, A. F., Milone, A. P., Tailo, M., Ventura, P., Vesperini, E.   +6 more
core   +2 more sources

Comparing the Host Galaxies of Type Ia, Type II and Type Ibc Supernovae

, 2014
We compare the host galaxies of 902 supernovae, including SNe Ia, SNe II and SNe Ibc, which are selected by cross-matching the Asiago Supernova Catalog with the SDSS Data Release 7.
Chen, X. Y., Deng, L. C., Dennefeld, M., Flores, H., Hammer, F., Liang, Y. C., Shao, X., Shi, W. B., Zhang, B., Zhong, G. H., Zhou, L.   +10 more
core   +2 more sources

JWST Observations of SN 2024ggi. I. Interpretation and Model Comparison of the Type II Supernova 2024ggi at 55 Days past Explosion

The Astrophysical Journal
We present panchromatic 0.4–21 μ m observations of the nearby (∼7.2 Mpc) Type II supernova (SN) 2024ggi, obtained during the plateau phase at ∼55 days past explosion. Our data set includes JWST spectra spanning 1.7–14 μ m, mid-infrared (MIR) imaging at 7.
E. Baron, C. Ashall, J. M. DerKacy, P. Hoeflich, K. Medler, M. Shahbandeh, E. Fereidouni, C. M. Pfeffer, T. Mera, W. B. Hoogendam, S. Shiber, K. Auchettl, P. J. Brown, C. R. Burns, A. Burrow, D. A. Coulter, M. Engesser, G. Folatelli, O. Fox, L. Galbany, M. Guolo, J. T. Hinkle, Mark E. Huber, E. Y. Hsiao, T. de Jaeger, D. O. Jones, S. Kumar, J. Lu, P. A. Mazzali, N. Morrell, M. M. Phillips, A. Rest, N. B. Suntzeff, B. J. Shappee, Jennifer Shi, M. D. Stritzinger, L. Strolger, T. Temim, S. Tinyanont, M. Tucker, L. Wang, Q. Wang, Y. Yang   +42 more
doaj   +1 more source

Physical properties of long-rising type II supernovae

Astronomy & Astrophysics
Context. The supernova (SN) 1987A, with its long-rising (≳40 days) light curve, defines a rare subclass of type II SNe known as 1987A-like events. Representing only ∼1–3% of all core-collapse SNe and often found in low-metallicity environments, their ...
Cosentino S. P., Inserra C., Pumo M. L.
doaj   +1 more source

The KARMEN anomaly, light neutralinos and type II supernovae

, 2000
The KARMEN experiment observes a time anomaly in events induced by pion decay at rest. This anomaly can be ascribed to the production of a new weakly interacting particle X with mass m_X\sim 34 MeV.
Kachelriess, M.
core   +3 more sources

SN 2024abfl: A Flat-plateau, Low-luminosity Type IIP Supernova with Early Circumstellar Matter Interaction

The Astrophysical Journal
We present photometric and spectroscopic observations of SN 2024abfl, a low-luminosity Type IIP supernova (LLSN) discovered shortly after explosion. The transient reached a peak absolute magnitude of M _V  = −14.9 and exhibited an extended, flat plateau ...
Madison Gerard, Jennifer E. Andrews, Geoffrey C. Clayton, David J. Sand, K. Azalee Bostroem, Jeniveve Pearson, Raya Dastidar, Aravind P. Ravi, Conor L. Ransome, Bhagya Subrayan, Griffin Hosseinzadeh, Brian Hsu, Yize Dong, Manisha Shrestha, Stefano Valenti, Nathan Smith, Daryl Janzen, M. J. Lundquist, Nicolás Meza, Saurabh W. Jha, Kate D. Alexander, Collin Christy, Noah Franz, Lindsey A. Kwok, Moira Andrews, Joseph Farah, Daichi Hiramatsu, D. Andrew Howell, Curtis McCully, Kathryn Wynn, Réka Könyves-Tóth, Xiaofeng Wang, Alexei V. Filippenko, Thomas G. Brink   +33 more
doaj   +1 more source