Results 41 to 50 of about 763 (187)

Multimessenger Constraints on the Central Engine in SN 2023ixf: Neutron Star or Black Hole?

The Astrophysical Journal
The physical trigger of core-collapse supernovae (CC-SNe) is a central theme in modern surveys of the transient Universe. A multimessenger approach may provide a unique window to CC-SNe produced by a newly born neutron star (NS) or black hole (BH). Here,
Maryam Aghaei Abchouyeh, Maurice H.P.M. van Putten, Massimo Della Valle   +2 more
doaj   +1 more source

Shared Vocabulary between Meiteilon and Tai Varieties and Pre‐Modern Language Contact on the Indo‐Myanmar Border1

Transactions of the Philological Society, EarlyView.
Abstract This article examines lexical and phonological evidence for language contact between Old and modern Meiteilon (Manipuri) and Tai varieties, identifying loanwords relating to domestic life, trade and literary culture. Comparative data from Shan dialects and Old Meiteilon manuscripts such as the Cheitharon Kumpapa are employed in contextualising
Josiah Medin
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

The Prevalence and Influence of Circumstellar Material around Hydrogen-rich Supernova Progenitors

The Astrophysical Journal, 2023
Narrow transient emission lines (flash-ionization features) in early supernova (SN) spectra trace the presence of circumstellar material (CSM) around the massive progenitor stars of core-collapse SNe.
Rachel J. Bruch, Avishay Gal-Yam, Ofer Yaron, Ping Chen, Nora L. Strotjohann, Ido Irani, Erez Zimmerman, Steve Schulze, Yi Yang, Young-Lo Kim, Mattia Bulla, Jesper Sollerman, Mickael Rigault, Eran Ofek, Maayane Soumagnac, Frank J. Masci, Christoffer Fremling, Daniel Perley, Jakob Nordin, S. Bradley Cenko, Anna Y. Q. Ho, S. Adams, Igor Adreoni, Eric C. Bellm, Nadia Blagorodnova, Kevin Burdge, Kishalay De, Richard G. Dekany, Suhail Dhawan, Andrew J. Drake, Dmitry A. Duev, Matthew Graham, Melissa L. Graham, Jacob Jencson, Emir Karamehmetoglu, Mansi M. Kasliwal, Shrinivas Kulkarni, A. A. Miller, James D. Neill, Thomas A. Prince, Reed Riddle, Benjamin Rusholme, Y. Sharma, Roger Smith, Niharika Sravan, Kirsty Taggart, Richard Walters, Lin Yan   +47 more
doaj   +1 more source

Supernovae and their host galaxies – II. The relative frequencies of supernovae types in spirals [PDF]

Monthly Notices of the Royal Astronomical Society, 2014
We present an analysis of the relative frequencies of different supernova (SN) types in spirals with various morphologies and in barred or unbarred galaxies. We use a well-defined and homogeneous sample of spiral host galaxies of 692 SNe from the Sloan Digital Sky Survey in different stages of galaxy-galaxy interaction and activity classes of nucleus ...
Hakobyan, A. A., Nazaryan, T. A., Adibekyan, V. Zh., Petrosian, A. R., Aramyan, L. S., Kunth, D., Mamon, G. A., de Lapparent, V., Bertin, E., Gomes, J. M., Turatto, M.   +10 more
openaire   +3 more sources

Proprioception drives tension wood formation for autotropic straightening and postural control in trees

New Phytologist, EarlyView.
Proprioception controls trunk straightness in trees through opposite tension wood formation. A spherical growth chamber (a), combined with a two‐dimensional rotating clinostat (b2), suppresses gravi‐ and phototropic sensing. The tree is first tilted horizontally (b1), triggering upward gravitropic bending, actuated by tension wood formation on the ...
Alexandre Caulus, Félix P. Hartmann, Éric Badel, Stéphane Ploquin, Nicole Brunel‐Michac, Julien Ruelle, Mélanie Decourteix, Bruno Moulia   +7 more
wiley   +1 more source

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

THE STANDARDIZED CANDLE METHOD FOR TYPE II PLATEAU SUPERNOVAE [PDF]

The Astrophysical Journal, 2010
In this paper we study the "standardized candle method" using a sample of 37 nearby (z<0.06) Type II plateau supernovae having BVRI photometry and optical spectroscopy. An analytic procedure is implemented to fit light curves, color curves, and velocity curves. We find that the V-I color toward the end of the plateau can be used to estimate the host-
Olivares, Felipe E., Hamuy, Mario, Pignata, Giuliano, Maza, José, Bersten, Melina, Phillips, Mark M., Suntzeff, Nicholas B., Filippenko, Alexei V., Morrel, Nidia I., Kirshner, Robert P., Matheson, Thomas   +10 more
openaire   +7 more sources

Rethinking microtidal systems: Tidal signatures in the fluvial deposits of the Po River, Italy

Sedimentology, EarlyView.
ABSTRACT In microtidally influenced rivers, tides are generally assumed to leave virtually no signatures in the sedimentary record. However, this hypothesis has been surprisingly poorly tested using modern river analogues, which provide an opportunity to assess whether sedimentary signatures of microtidal regimes can develop in rivers that lack ...
Anna E. van Yperen, Alvise Finotello, Riccardo Maitan, Ivar Midtkandal, Fabrizio Nestola, Davide Tognin, Massimiliano Ghinassi   +6 more
wiley   +1 more source

Late-time Optical and X-Ray Emission Evolution of the Oxygen-rich SN 1996cr

The Astrophysical Journal
When the ejecta of a supernova (SN) interact with the progenitor star's circumstellar environment, a strong shock is driven back into the ejecta, causing the material to become bright optically and in X-rays.
Daniel Patnaude, Kathryn E. Weil, Robert A. Fesen, Dan Milisavljevic, Ralph P. Kraft   +4 more
doaj   +1 more source