Results 61 to 70 of about 48,593 (219)

JWST Observations of SN 2024ggi. II. NIRSpec Spectroscopy and CO Modeling at +285–385 Days past the Explosion

The Astrophysical Journal
We present James Webb Space Telescope (JWST) Near-Infrared Spectrograph observations of SN 2024ggi, spanning wavelengths of 1.7–5.5 μ m at +285.51 and +385.27 days postexplosion.
T. Mera, C. Ashall, P. Hoeflich, K. Medler, M. Shahbandeh, C. R. Burns, E. Baron, J. M. DerKacy, N. Morrell, J. Lu, J. T. Hinkle, P. A. Mazzali, E. Fereidouni, C. M. Pfeffer, S. Shiber, T. Temim, L. Galbany, D. A. Coulter, L. Ferrari, W. B. Hoogendam, E. Y. Hsiao, M. M. Phillips, B. J. Shappee   +22 more
doaj   +1 more source

Bayesian estimation applied to multiple species [PDF]

, 2006
Observed data are often contaminated by undiscovered interlopers, leading to biased parameter estimation. Here we present BEAMS (Bayesian estimation applied to multiple species) which significantly improves on the standard maximum likelihood approach in ...
B. P. Schmidt, Bruce A. Bassett, J. Sollerman, M. Sullivan, Martin Kunz, N. Kaiser, Renée A. Hlozek   +6 more
core   +3 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, EarlyView.
This study introduces a self‐supervised machine learning approach integrating physics‐based principles to estimate open‐circuit voltage (voc$$ {v}_{oc} $$) degradation in photovoltaic systems using SCADA data. By combining clustering and regression algorithms, our method detects performance deviations without labelled datasets.
Sandra Riaño, Jose‐Domingo Santos, Miguel Esteras, Amaia Abanda, Javier Del Ser   +4 more
wiley   +1 more source

Long Plateau Doth So: How Internal Heating Sources Affect Hydrogen-rich Supernova Light Curves

The Astrophysical Journal
Some hydrogen-rich core-collapse supernovae (SNeIIP) exhibit evidence of a sustained energy source powering their light curves, resulting in a brighter and/or longer-lasting hydrogen recombination plateau phase.
Tatsuya Matsumoto, Brian D. Metzger, Jared A. Goldberg   +2 more
doaj   +1 more source

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

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

A comparative study of Type II-P and II-L supernova rise times as exemplified by the case of LSQ13cuw [PDF]

, 2015
We report on our findings based on the analysis of observations of the Type II-L supernova LSQ13cuw within the framework of currently accepted physical predictions of core-collapse supernova explosions.
Anderson, J. P., Baltay, C., Benetti, S., Feindt, U., Fraser, M., Gall, E. E. E., González-Gaitán, S., Inserra, C., Jerkstrand, A., Kotak, R., Leibundgut, B., Maguire, K., McKinnon, R., Polshaw, J., Rabinowitz, D., Smartt, S. J., Sollerman, J., Sullivan, M., Valenti, S., Young, D.   +19 more
core   +5 more sources

SN 2019tua: A Type IIb Supernova with Multiple Bumps in the Light Curves

The Astrophysical Journal
We present photometric and spectroscopic observations and analysis of the Type IIb supernova (SN) SN 2019tua, which exhibits multiple bumps in its declining light curves between 40 and 65 days after discovery.
Xin-Bo Huang, Xiang-Gao Wang, Long Li, Li-Ping Xin, Jing Wang, Tian-Ci Zheng, Qi Wang, Hui-Ya Liu, Zi-Min Zhou, Xiao-Meng Lu, Jian-Yan Wei, En-Wei Liang   +11 more
doaj   +1 more source

Whole Genome Assembly and Annotation of Two Invasive Sitona Species

Journal of Applied Entomology, EarlyView.
ABSTRACT Weevils are a highly diversified taxon, comprising about 70,000 described species, including many of high economic importance. Here, we present whole genome assemblies and annotations of two Sitona species (Coleoptera: Curculionidae: Entiminae).
Mandira Katuwal, Upendra Raj Bhattarai, Craig B. Phillips, Neil J. Gemmell, Eddy Dowle   +4 more
wiley   +1 more source

Shock-cooling Constraints via Early-time Observations of the Type IIb SN 2022hnt

The Astrophysical Journal
We report the results of a rapid follow-up campaign on the Type IIb supernova (SN) 2022hnt. We present a daily, multiband, photometric follow-up using the Las Cumbres Observatory, the Zwicky Transient Facility, the orbiting Swift observatory, and the ...
Joseph R. Farah, D. Andrew Howell, Giacomo Terreran, Ido Irani, Jonathan Morag, Craig Pellegrino, Curtis McCully, Megan Newsome, Estefania Padilla Gonzalez, K. Azalee Bostroem, Griffin Hosseinzadeh, Moira Andrews, Logan Prust, Daichi Hiramatsu   +13 more
doaj   +1 more source