Results 81 to 90 of about 2,618 (181)

Hα Spectral Diversity of Type II Supernovae: Correlations with Photometric Properties [PDF]

, 2014
Artículo de publicación ISI.We present a spectroscopic analysis of the Hα profiles of hydrogen-rich Type II supernovae. A total of 52 Type II supernovae having well-sampled optical light curves and spectral sequences were analyzed. Concentrating on the
Gutiérrez, Claudia P., Anderson, Joseph P., González Gaitán, Santiago, Hamuy Wackenhut, Mario, Morrell, Nidia, Stritzinger, Maximilian D., Phillips, Mark M., Suntzeff, Nicholas B., MoroMartín, Amaya, homas-Osip, Joanna T., Folatelli, Gastón   +10 more
core   +1 more source

UBVRIz light curves of 51 type II supernovae [PDF]

, 2018
We present a compilation of UBVRIz light curves of 51 type II supernovae discovered during the course of four different surveys during 1986–2003: the Cerro Tololo Supernova Survey, the Calán/Tololo Supernova Program (C&T), the Supernova Optical and ...
Galbany, Lluis, Hamuy, M., Maza, J, Schommer, Robert, Suntzeff, N, Krisciunas, Kevin, González-Gaitán, Santiago, de Jaeger, T, Schmidt, Brian, Moraga, Tania, Morrell, N, Phillips, M. M.   +11 more
core   +6 more sources

SN 2024aecx: A Double-peaked Rapidly Evolving Type IIb Supernova at 11 Mpc

The Astrophysical Journal
We present the results of low-resolution spectroscopic and densely sampled multiband photometric follow-up of supernova (SN) 2024aecx. The SN was discovered in the spiral galaxy NGC 3521 (distance ∼ 11 Mpc) within a day after the explosion.
Xingzhu Zou, Brajesh Kumar, Rishabh Singh Teja, D. K. Sahu, Xinlei Chen, Avinash Singh, Weikang Lin, Xiangkun Liu, Dezi Liu, Hrishav Das, Mridweeka Singh, G. C. Anupama, Yu Pan, Guowang Du, Helong Guo, Tao Wang, Xufeng Zhu, Jujia Zhang, Yuan Fang, Chenxu Liu, Kaushik Chatterjee, Yuan-Pei Yang, Liping Li, Qian Zhai, Edoardo P. Lagioia, Xueling Du, Xinzhong Er, Jianhui Lian, Ziwei Li, Shiyan Zhong, Xiaowei Liu   +30 more
doaj   +1 more source

Conversion Between 2‐ and 3‐Dimensional Halogen‐Bonded Networks Formed From a Single N‐Oxide/Iodoalkyne Building Block

Chemistry – A European Journal, Volume 32, Issue 25, 2 July 2026.
Open halogen‐bonded networks have been prepared from building blocks that incorporate both iodoalkyne halogen bond donors and a pyridine‐N‐oxide halogen bond acceptor. An initially‐formed 3D network containing dioxane in its channels undergoes an unprecedented transition to a 2D material when crystals are exposed to diethyl ether.
Jordan N. Smith, Courtney Ennis, Huan V. Doan, Valeska P. Ting, Nicholas G. White   +4 more
wiley   +1 more source

Carnegie Supernova Project-II: Near-infrared Spectroscopic Diversity of Type II Supernovae [PDF]

The Astrophysical Journal, 2019
AbstractWe present 81 near-infrared (NIR) spectra of 30 Type II supernovae (SNe II) from theCarnegie Supernova Project-II(CSP-II), the largest such data set published to date. We identify a number of NIR features and characterize their evolution over time. The NIR spectroscopic properties of SNe II fall into two distinct groups.
S. Davis, E. Y. Hsiao, C. Ashall, P. Hoeflich, M. M. Phillips, G. H. Marion, R. P. Kirshner, N. Morrell, D. J. Sand, C. Burns, C. Contreras, M. Stritzinger, J. P. Anderson, E. Baron, T. Diamond, C. P. Gutiérrez, M. Hamuy, S. Holmbo, M. M. Kasliwal, K. Krisciunas, S. Kumar, J. Lu, P. J. Pessi, A. L. Piro, J. L. Prieto, M. Shahbandeh, N. B. Suntzeff   +26 more
openaire   +5 more sources

Electron-capture Supernova Candidates from Light Curves: Implications for Their Progenitors and Explosion Properties

The Astrophysical Journal
Core-collapse supernovae are explosions of massive stars. While most massive stars end as iron-core-collapse supernovae, less massive stars are expected to explode as electron-capture supernovae (ECSNe), defining the low-mass boundary of core-collapse ...
Masato Sato, Nozomu Tominaga, Sergei I. Blinnikov, Marat Sh. Potashov, Takashi J. Moriya, Daichi Hiramatsu, Francisco Förster, Joseph P. Anderson   +7 more
doaj   +1 more source

Naphthyridine‐Based Donor–Acceptor Boron Difluoride Complexes Targeting Red Emission in Organic Light‐Emitting Diodes

Advanced Optical Materials, Volume 14, Issue 25, 3 July 2026.
Four donor–acceptor boron difluoride complexes based on triphenylamine donor and a naphthyridine acceptor units were synthesized, studied, and applied as OLED emitters. They exhibit pronounced intramolecular charge transfer character, balanced charge transport properties, and tunable emission. Near‐unity PLQYs are achieved for selected compounds, while
Omar Lahna, Stepan Kutsiy, Dmytro Volyniuk, Roman Luboradzki, Elina Andresen, Ute Resch‐Genger, Juozas V. Grazulevicius, Pavlo Stakhira, Mykhaylo A. Potopnyk   +8 more
wiley   +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

A Self‐Supervised Machine Learning Approach for the Estimation of Open‐Circuit Voltage Degradation in Photovoltaic Systems

Progress in Photovoltaics: Research and Applications, Volume 34, Issue 7, Page 920-941, July 2026.
This study introduces a self‐supervised machine learning approach integrating physics‐based principles to estimate open‐circuit voltage ( voc) degradation in photovoltaic systems using SCADA data. By combining clustering and regression algorithms, our method detects performance deviations without labelled datasets. Results across three PV installations
Sandra Riaño, Jose‐Domingo Santos, Miguel Esteras, Amaia Abanda, Javier Del Ser   +4 more
wiley   +1 more source

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