Results 41 to 50 of about 48,520 (216)

Type II Supernova Spectral Diversity. II. Spectroscopic and Photometric Correlations [PDF]

The Astrophysical Journal, 2017
We present an analysis of observed trends and correlations between a large range of spectral and photometric parameters of more than 100 type II supernovae (SNe~II), during the photospheric phase. We define a common epoch for all SNe of 50 days post-explosion where the majority of the sample is likely to be under similar physical conditions.
Claudia P. Gutiérrez, Joseph P. Anderson, Mario Hamuy, Santiago González-Gaitan, Lluis Galbany, Luc Dessart, Maximilian D. Stritzinger, Mark M. Phillips, Nidia Morrell, Gastón Folatelli   +9 more
openaire   +8 more sources

Long-rising Type II Supernovae in the Zwicky Transient Facility Census of the Local Universe

The Astrophysical Journal, 2023
SN 1987A was an unusual hydrogen-rich core-collapse supernova originating from a blue supergiant star. Similar blue supergiant explosions remain a small family of events, and are broadly characterized by their long rises to peak.
Tawny Sit, Mansi M. Kasliwal, Anastasios Tzanidakis, Kishalay De, Christoffer Fremling, Jesper Sollerman, Avishay Gal-Yam, Adam A. Miller, Scott Adams, Robert Aloisi, Igor Andreoni, Matthew Chu, David Cook, Kaustav Kashyap Das, Alison Dugas, Steven L. Groom, Anna Y. Q. Ho, Viraj Karambelkar, James D. Neill, Frank J. Masci, Michael S. Medford, Josiah Purdum, Yashvi Sharma, Roger Smith, Robert Stein, Lin Yan, Yuhan Yao, Chaoran Zhang   +27 more
doaj   +1 more source

TYPE II-P SUPERNOVAE FROM THE SDSS-II SUPERNOVA SURVEY AND THE STANDARDIZED CANDLE METHOD [PDF]

The Astrophysical Journal, 2009
Accepted for publication by ApJ; data used in this paper can be downloaded from http://sdssdp47.fnal.gov/sdsssn/photometry/SNIIp.tgz; citation errors ...
D’andrea, Chris B., Sako, Masao, Dilday, Benjamin, Frieman, Joshua A., Holtzman, Jon A., Kessler, Richard, Konishi, Kohki, Schneider, Donald P., Sollerman, Jesper, Wheeler, J. Craig, Yasuda, Naoki, Cinabro, David, Jha, Saurabh W., Nichol, Robert C., Lampeitl, Hubert, Smith, Mathew, Atlee, David W., Bassett, Bruce A., Castander, Francisco Javier, Goobar, Ariel, Miquel, Ramon, Nordin, Jakob, Ostman, Linda, Prieto, Jose Luis, Quimby, Robert, Riess, Adam G., Stritzinger, Maximilian D.   +26 more
openaire   +7 more sources

Lambda-Cold Dark Matter, Stellar Feedback, and the Galactic Halo Abundance Pattern [PDF]

, 2005
(Abridged) The hierarchical formation scenario for the stellar halo requires the accretion and disruption of dwarf galaxies, yet low-metallicity halo stars are enriched in alpha-elements compared to similar, low-metallicity stars in dwarf spheroidal ...
Andreea S. Font, Bondi H., Brant Robertson, Devriendt J. E. G., Gratton R. G., Gratton R. G., Gratton R. G., Greggio L., Hill V., Hill V., Hill V., Hill V., James S. Bullock, Jasniewicz G., Kathryn V. Johnston, Lacey C., Lars Hernquist, Matteucci F., Matteucci F., Matteucci F., Moore B., Nissen P. E., Pagel B. E. J., Schaller G., Tinsley B. M., Tinsley B. M., Tsujimoto T., Unavane M.   +27 more
core   +2 more sources

SN 2021dbg: A Luminous Type IIP–IIL Supernova Exploding from a Massive Star with a Layered Shell

The Astrophysical Journal
We present extensive observations and analysis of supernova (SN) SN 2021dbg, utilizing optical photometry and spectroscopy. For approximately 385 days following the explosion, SN 2021dbg exhibited remarkable luminosity, surpassing most Type II SNe (SNe ...
Zeyi Zhao, Jujia Zhang, Liping Li, Qian Zhai, Yongzhi Cai, Shubham Srivastav, Xiaofeng Wang, Han Lin, Yi Yang, Alexei V. Filippenko, Thomas G. Brink, WeiKang Zheng   +11 more
doaj   +1 more source

Radiative Acceleration of Dense Circumstellar Material in Interacting Supernovae

The Astrophysical Journal, 2023
Early-time light curves/spectra of some hydrogen-rich supernovae (SNe) provide solid evidence of the existence of confined, dense circumstellar matter (CSM) surrounding dying massive stars. We numerically and analytically study the radiative acceleration
Daichi Tsuna, Kohta Murase, Takashi J. Moriya   +2 more
doaj   +1 more source

Mind and Cosmos as Throughput Systems: A Convergence Through the Throughput Model

Systems Research and Behavioral Science, EarlyView.
ABSTRACT This paper advances a conceptual and mathematical foundations approach by applying the throughput model (TPM) to cosmic phenomena, reframing the universe as an extended information processing system. TPM's four stages, Perception, Information, Judgement and Decision Choice, are reformulated in explicit information‐theoretic and dynamical ...
Waymond Rodgers
wiley   +1 more source

SN 2023ixf in the Pinwheel Galaxy M101: From Shock Breakout to the Nebular Phase

The Astrophysical Journal
We present photometric and spectroscopic observations of supernova SN 2023ixf covering from day 1 to 442 days after explosion. SN 2023ixf reached a peak V -band absolute magnitude of −18.2 ± 0.07, and light curves show that it has a relatively short ...
WeiKang Zheng, Luc Dessart, Alexei V. Filippenko, Yi Yang, Thomas G. Brink, Thomas de Jaeger, Sergiy S. Vasylyev, Schuyler D. Van Dyk, Kishore C. Patra, Wynn V. Jacobson-Galán, Gabrielle E. Stewart, Efrain Alvarado III, Veda Arikatla, Pallas Beddow, Andreas Betz, Emma Born, Kate Bostow, Adam J. Burgasser, Osmin Caceres, Evan M. Carrasco, Elma Chuang, Asia DeGraw, Elinor L. Gates, Eli Gendreau-Distler, Cooper Jacobus, Connor Jennings, Preethi R. Karpoor, Paul Lynam, Ann Mina, Katherine Mora, Neil Pichay, Jyotsna Ravi, Jon Rees, R. Michael Rich, Sophia Risin, Nathan R. Sandford, Alessandro Savino, Emma Softich, Christopher A. Theissen, Edgar P. Vidal, William Wu, Yoomee Zeng   +41 more
doaj   +1 more source

The Ammann–Kramer–Neri tiling model of a P‐ZnMgEr Bergman‐type quasicrystal based on in‐house X‐ray diffraction

Acta Crystallographica Section B, EarlyView.
A structural solution is presented of a primitive icosahedral ZnMgEr quasicrystal representing the Bergman‐type family. The structure model is based on atomic decoration of the Ammann–Kramer–Neri tiling.This study presents the atomic structure solution of a primitive icosahedral Zn70.83Mg20.31Er8.86 quasicrystal using in‐house X‐ray diffraction and the
Ireneusz Buganski, Stanislav Vrtnik, Andreja Jelen, Jože Luzar, Radoslaw Strzalka, Janusz Wolny, Joachim Kusz, Nobuhisa Fujita   +7 more
wiley   +1 more source

Model Calculations for Cosmogenic Nuclides in Meteorites and the Lunar Surface. 1. Long‐lived Radionuclides

Meteoritics &Planetary Science, EarlyView.
Abstract Production rates for the cosmogenic radionuclides 10Be, 14C, 26Al, 36Cl, 41Ca, 53Mn, and 60Fe in a large variety of meteorites, that is, ordinary chondrites (H, L, LL), carbonaceous chondrites, HED meteorites, ureilites, Martian meteorites, and iron meteorites and in the uppermost ~2 m of the lunar surface are modeled.
Ingo Leya
wiley   +1 more source