Results 51 to 60 of about 695 (169)

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

Probing the Shock Breakout Signal of SN 2024ggi from the Transformation of Early Flash Spectroscopy

The Astrophysical Journal Letters
We present early-time, hour-to-day cadence spectroscopy of the nearby Type II supernova (SN II) 2024ggi, which was discovered at a phase when the SN shock had just emerged from the red supergiant (RSG) progenitor star.
Jujia Zhang, Luc Dessart, Xiaofeng Wang, Qian Zhai, Yi Yang, Liping Li, Han Lin, Giorgio Valerin, Yongzhi Cai, Zhen Guo, Lingzhi Wang, Zeyi Zhao, Zhenyu Wang, Shengyu Yan   +13 more
doaj   +1 more source

Precursors of Supernovae from Mass Eruption: Prospects for Early Warning of Nearby Core-collapse Supernovae

The Astrophysical Journal, 2023
Recent observations of a large fraction of Type II supernovae (SNe) show traces of dense circumstellar medium (CSM) very close to the progenitor star. If this CSM is created by eruptive mass loss several months before core collapse, the eruption itself ...
Daichi Tsuna, Yuki Takei, Toshikazu Shigeyama   +2 more
doaj   +1 more source

Discovery and Extensive Follow-up of SN 2024ggi, a Nearby Type IIP Supernova in NGC 3621

The Astrophysical Journal
We present the discovery and early observations of the nearby Type II supernova (SN) 2024ggi in NGC 3621 at 6.64 ± 0.3 Mpc. The SN was caught $5.{8}_{-2.9}^{+1.9}$ hr after its explosion by the ATLAS survey.
Ting-Wan Chen, Sheng Yang, Shubham Srivastav, Takashi J. Moriya, Stephen J. Smartt, Sofia Rest, Armin Rest, Hsing Wen Lin, Hao-Yu Miao, Yu-Chi Cheng, Amar Aryan, Chia-Yu Cheng, Morgan Fraser, Li-Ching Huang, Meng-Han Lee, Cheng-Han Lai, Yu-Hsuan Liu, Aiswarya Sankar.K, Ken W. Smith, Heloise F. Stevance, Ze-Ning Wang, Joseph P. Anderson, Charlotte R. Angus, Thomas de Boer, Kenneth Chambers, Hao-Yuan Duan, Nicolas Erasmus, Michael Fulton, Hua Gao, Joanna Herman, Wei-Jie Hou, Hsiang-Yao Hsiao, Mark E. Huber, Chien-Cheng Lin, Hung-Chin Lin, Eugene A. Magnier, Ka Kit Man, Thomas Moore, Chow-Choong Ngeow, Matt Nicholl, Po-Sheng Ou, Giuliano Pignata, Yu-Chien Shiau, Julian Silvester Sommer, John L. Tonry, Xiao-Feng Wang, Richard Wainscoat, David R. Young, You-Ting Yeh, Jujia Zhang   +49 more
doaj   +1 more source

THE EFFECT OF HOST GALAXIES ON TYPE Ia SUPERNOVAE IN THE SDSS-II SUPERNOVA SURVEY [PDF]

The Astrophysical Journal, 2010
17 pages, 7 figures, accepted for publication in ApJ Table 2 detailing host galaxy properties ...
Lampeitl, Hubert, /Portsmouth U., ICG, Smith, Mathew, /Cape Town U. /Portsmouth U., ICG, Nichol, Robert C., Bassett, Bruce, U., /South African Astron. Observ. /Cape Town, Cinabro, David, U., /Wayne State, Dilday, Benjamin, /Rutgers U., Piscataway, Foley, Ryan J., Astrophys., /Harvard-Smithsonian Ctr., Frieman, Joshua A., /Fermilab, /Chicago U., Garnavich, Peter M., U., /Notre Dame, Goobar, Ariel, /Stockholm U., OKC, Im, Myungshin, /Seoul Natl. U. /Rutgers U., Piscataway   +23 more
openaire   +4 more sources

Optical and Near-infrared Nebular-phase Spectroscopy of SN 2024ggi: Constraints on the Structure of the Inner Ejecta, Progenitor Mass, and Dust

The Astrophysical Journal
We present optical and near-infrared (NIR) spectroscopic observations of the nearby Type II supernova SN 2024ggi ranging from 250 to 581 days after the explosion.
Emilio Hueichapán, Régis Cartier, Jose L. Prieto, Carlos Contreras, Aleksandar Cikota, Thallis Pessi, Franz E. Bauer, Giuliano Pignata, Camila Cardenas, Sethulakshmi Vazhayil   +9 more
doaj   +1 more source

The hydrodynamics of Type II supernovae

The Astrophysical Journal, 1976
Observations of Type II supernovae indicate the presence of a moderately cool expanding photosphere. This situation can result from an explosion in a star with an extended envelope. The evolutionary phases of an explosion are described. Information on the propagation of the shock wave through the star can be obtained from ..gamma..=4/3 blast wave ...
openaire   +1 more source

Analysis of blueshifted emission peaks in Type II supernovae [PDF]

Monthly Notices of the Royal Astronomical Society, 2014
In classical P-Cygni profiles, theory predicts emission to peak at zero rest velocity. However, supernova spectra exhibit emission that is generally blue shifted. While this characteristic has been reported in many supernovae, it is rarely discussed in any detail.
Anderson, Joseph P., Suntzeff, Nicholas B., Thomas-Osip, J., Dessart, L., Gutiérrez, Claudia P., Hamuy Wackenhut, Mario, Morrell, N. I., Phillips, M. M., Folatelli, Gastón, Stritzinger, M. D., Freedman, W. L., González Gaitán, Santiago, McCarthy, P.   +12 more
openaire   +5 more sources

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

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