Results 51 to 60 of about 7,335,139 (174)

The broad-line type Ic supernova SN 2007ru: adding to the diversity of type Ic supernovae

, 2009
Photometric and spectral evolution of the Type Ic supernova SN 2007ru until around 210 days after maximum are presented. The spectra show broad spectral features due to very high expansion velocity, normally seen in hypernovae.
Nomoto, Ken'ichi, Anupama, G. C., Gurugubelli, Uday K., Sahu, D. K., Tanaka, Masaomi   +4 more
core   +1 more source

Optical and Radio Analysis of Systematically Classified Broad-lined Type Ic Supernovae from the Zwicky Transient Facility

The Astrophysical Journal
We study a magnitude-limited sample of 36 broad-lined type Ic supernovae (SNe Ic-BL) from the Zwicky Transient Facility Bright Transient Survey (detected between 2018 March and 2021 August), which is the largest systematic study of SNe Ic-BL done in ...
Gokul P. Srinivasaragavan, Sheng Yang, Shreya Anand, Jesper Sollerman, Anna Y. Q. Ho, Alessandra Corsi, S. Bradley Cenko, Daniel Perley, Steve Schulze, Marquice Sanchez-Fleming, Jack Pope, Nikhil Sarin, Conor Omand, Kaustav K. Das, Christoffer Fremling, Igor Andreoni, Rachel Bruch, Kevin B. Burdge, Kishalay De, Avishay Gal-Yam, Anjasha Gangopadhyay, Matthew J. Graham, Jacob E. Jencson, Viraj Karambelkar, Mansi M. Kasliwal, S. R. Kulkarni, Julia Martikainen, Yashvi S. Sharma, Anastasios Tzanidakis, Lin Yan, Yuhan Yao, Eric C. Bellm, Steven L. Groom, Frank J. Masci, Guy Nir, Josiah Purdum, Roger Smith, Niharika Sravan   +37 more
doaj   +1 more source

Thermally activated delayed fluorescence Au‐Ag‐oxo nanoclusters: From photoluminescence to radioluminescence

Aggregate, Volume 5, Issue 2, April 2024.
Au18Ag26 nanoclusters are the largest Au‐Ag‐oxo nanoclusters reported to date, showcasing remarkable TADF characteristics. Strong π⋯π interactions from aromatic alkynyl ligands and O2−‐induced metal aggregation contribute to their outstanding photoluminescence.
Peng Yuan, Hansong Zhang, Yang Zhou, Tengyue He, Sami Malola, Luis Gutiérrez‐Arzaluz, Yingwei Li, Guocheng Deng, Chunwei Dong, Renwu Huang, Xin Song, Boon K. Teo, Omar F. Mohammed, Hannu Häkkinen, Osman. M. Bakr, Nanfeng Zheng   +15 more
wiley   +1 more source

An Infrared Echo from a Circumstellar Disk in the Hydrogen- and Helium-poor SN 2024aecx

The Astrophysical Journal
We present near-infrared (NIR) spectroscopy of the hydrogen- and helium-poor (Type Ic supernovae (SNe Ic)) SN 2024aecx, which displays a strong NIR excess emerging 32 days postpeak.
Samaporn Tinyanont, Kittipong Wangnok, Jennifer E. Andrews, Ryan J. Foley, Methawee Kaewmookda, Jacob E. Jencson, Armin Rest, Katie Auchettl, K. Azalee Bostroem, David A. Coulter, Poemwai Chainakun, Ryan Chornock, Kyle W. Davis, Ori D. Fox, Lluís Galbany, T. R. Geballe, Brian Hsu, Wynn V. Jacobson-Galán, Saurabh W. Jha, Ravjit Kaur, Mansi M. Kasliwal, Ryan M. Lau, Natalie LeBaron, Rafaella Margutti, Seong Hyun Park, Jeniveve Pearson, Anthony L. Piro, Conor L. Ransome, Aravind P. Ravi, Jeonghee Rho, César Rojas-Bravo, Sam Rose, David J. Sand, Nathan Smith, Manisha Shrestha, Bhagya M. Subrayan, Stefano Valenti   +36 more
doaj   +1 more source

One‐dimensional molecular co‐crystal alloys capable of full‐color emission for low‐loss optical waveguide and optical logic gate

Aggregate, Volume 5, Issue 1, February 2024.
By using a molecular organic alloys (MCAs) strategy, several MCAs are prepared through tuning the stoichiometric ratio of pyrene and fluoranthene. Multiple energy level structure and Förster Resonance Energy Transfer (FRET) endow materials with tunable emission.
Zhenhong Qi, Yu‐Juan Ma, Dongpeng Yan
wiley   +1 more source

Near-infrared Spectral Properties of Type Ib/Ic Supernova Progenitors and Implications for JWST and NGRST Observations

The Astrophysical Journal
While about 20 type II supernova (SN II) progenitors have been identified using optical data from the Hubble Space Telescope (HST), direct detection of type Ib/Ic supernova (SN Ib/Ic) progenitors remains challenging, due to their faint optical brightness
Moo-Keon Jung, Sung-Chul Yoon
doaj   +1 more source

Stratified learning: A general‐purpose statistical method for improved learning under covariate shift

Statistical Analysis and Data Mining: The ASA Data Science Journal, Volume 17, Issue 1, February 2024.
Abstract We propose a simple, statistically principled, and theoretically justified method to improve supervised learning when the training set is not representative, a situation known as covariate shift. We build upon a well‐established methodology in causal inference and show that the effects of covariate shift can be reduced or eliminated by ...
Maximilian Autenrieth, David A. van Dyk, Roberto Trotta, David C. Stenning   +3 more
wiley   +1 more source

WFST Supernovae in the First Year. III. Systematical Study of the Photometric Behavior of Early-phase Core-collapse Supernovae

The Astrophysical Journal
We investigate the multiband photometric properties of seven supernovae (SNe) showing double-peaked light-curve evolution and prominent shock-cooling emission, observed by the Wide Field Survey Telescope during its first year of operation.
Junhan Zhao, Ji-an Jiang, Zelin Xu, Yu-Hao Zhang, Qiliang Fang, Liang-Duan Liu, Qingfeng Zhu, Yun-Wei Yu, Keiichi Maeda, Lluís Galbany, Hanindyo Kuncarayakti, Željko Ivezić, Saurabh W. Jha, Peter Yoachim, Dezheng Meng, Weiyu Wu, Zhengyan Liu, Andrew J. Connolly, Zigao Dai, Ziqing Jia, Wen Zhao, Lulu Fan, Ming Liang, Hairen Wang, Jian Wang, Hongfei Zhang   +25 more
doaj   +1 more source

Phylogenomic analysis of protein‐coding genes resolves complex gall wasp relationships

Systematic Entomology, Volume 49, Issue 1, Page 110-137, January 2024.
We present the first phylogenomic analysis of gall wasp relationships (Hymenoptera: Cynipidae) based on protein‐coding sequence data from genome and transcriptome assemblies. Our results confirm previous analyses of ultra‐conserved elements, suggesting that the family falls into three lineages, recognized here as separate families: Cynipidae (s. str.),
Jack Hearn, Erik Gobbo, José Luis Nieves‐Aldrey, Antoine Branca, James A. Nicholls, Georgios Koutsovoulos, Nicolas Lartillot, Graham N. Stone, Fredrik Ronquist   +8 more
wiley   +1 more source

Type Ib and Ic supernovae: Models and spectra

, 1996
In this paper we consider the properties of massive star models for type Ib and Ic supernovae. There are two ways that a massive star can lose its hydrogen envelope - binary mass exchange and stellar wind. These are not mutually exclusive.
Woosley, S.E. (California Univ., Santa Cruz, CA (United States). Board of Studies in Astronomy and Astrophysics, Eastman, R.G. (Lawrence Livermore National Lab. (LLNL), CA (United States)), Max-Planck-Institut fuer Astrophysik, Garching (Germany), Max-Planck-Institut fuer Astrophysik, Garching (Germany))   +3 more
core