Results 81 to 90 of about 584 (186)

Evidence for an Instability-induced Binary Merger in the Double-peaked, Helium-rich Type IIn Supernova 2023zkd

The Astrophysical Journal
We present ultraviolet to infrared observations of the extraordinary Type IIn supernova 2023zkd (SN 2023zkd). Photometrically, it exhibits persistent and luminous precursor emission spanning ∼4 yr preceding discovery ( M _r  ≈ −15 mag, 1500 days in the ...
A. Gagliano, V. A. Villar, T. Matsumoto, D. O. Jones, C. L. Ransome, A. E. Nugent, D. Hiramatsu, K. Auchettl, D. Tsuna, Y. Dong, S. Gomez, P. D. Aleo, C. R. Angus, T. de Boer, K. A. Bostroem, K. C. Chambers, D. A. Coulter, K. W. Davis, J. R. Fairlamb, J. Farah, D. Farias, R. J. Foley, C. Gall, H. Gao, E. P. Gonzalez, D. A. Howell, M. E. Huber, C. D. Kilpatrick, C.-C. Lin, T. B. Lowe, M. E. MacLeod, E. A. Magnier, C. McCully, P. Mínguez, G. Narayan, M. Newsome, K. C. Patra, A. Rest, S. Rest, S. Smartt, K. W. Smith, G. Terreran, R. J. Wainscoat, Q. Wang, S. K. Yadavalli, Y. Zenati   +45 more
doaj   +1 more source

The mystery of unidentified infrared emission bands. [PDF]

Astrophys Space Sci, 2022
Kwok S.
europepmc   +1 more source

A Spectroscopic and Photometric Study of MWC 342 and Its B[e] Phenomenon over the Last 40 Years

Galaxies
MWC 342 (V1972 Cyg) was discovered nearly 90 years ago as an early-type emission-line star. It was among the first hot stars whose strong infrared excess was detected in the early 1970s.
Aigerim Zh. Akniyazova, Anatoly S. Miroshnichenko, Sergey V. Zharikov, Hans Van Winckel, Nadine Manset, Ashish Raj, Stephen Drew Chojnowski, Serik A. Khokhlov, Inna V. Reva, Raushan I. Kokumbaeva, Chingis T. Omarov, Konstantin N. Grankin, Aldiyar T. Agishev, Nadezhda L. Vaidman   +13 more
doaj   +1 more source

Transients by Black Hole Formation from Red Supergiants: Impact of Dense Circumstellar Matter

The Astrophysical Journal
Failed supernovae (SNe), which are likely the main channel for forming stellar-mass black holes, are predicted to accompany mass ejections much weaker than typical core-collapse SNe.
Daichi Tsuna, Xiaoshan Huang, Jim Fuller, Anthony L. Piro   +3 more
doaj   +1 more source

Radiation-driven acceleration in the expanding WR140 dust shell. [PDF]

Nature, 2022
Han Y, Tuthill PG, Lau RM, Soulain A.
europepmc   +1 more source

86th Annual Meeting of the Meteoritical Society (2024)

Meteoritics &Planetary Science, Volume 59, Issue S1, Page A1-A468, August 2024.
wiley   +1 more source

X-Ray Diagnostics of Cassiopeia A’s “Green Monster”: Evidence for Dense Shocked Circumstellar Plasma

The Astrophysical Journal Letters
The recent survey of the core-collapse supernova remnant Cassiopeia A (Cas A) with the MIRI instrument on board the James Webb Space Telescope (JWST) revealed a large structure in the interior region, referred to as the “Green Monster.” Although its ...
Jacco Vink, Manan Agarwal, Patrick Slane, Ilse De Looze, Dan Milisavljevic, Daniel Patnaude, Tea Temim   +6 more
doaj   +1 more source

Hidden metallic iron in amorphous silicate dust?

Astronomy & Astrophysics
Context. Amorphous silicate dust is a major component in the interstellar and circumstellar dust formed in the outflow of asymptotic giant branch (AGB) stars.
Enomoto H., Takigawa A., Chihara H., Koike C.   +3 more
doaj   +1 more source

A Shock Crashing into Confined Dense Circumstellar Matter Brightens the Nascent SN 2023ixf

The Astrophysical Journal
Red supergiants may experience a short-lived period of episodic mass loss rather than steady winds before their core collapses, leading to dense circumstellar matter (CSM) close to core-collapse supernovae (SNe). Interaction of SN ejecta with such nearby
Maokai Hu, Lifan Wang, Xiaofeng Wang
doaj   +1 more source

exoALMA. XI. ALMA Observations and Hydrodynamic Models of LkCa 15: Implications for Planetary Mass Companions in the Dust Continuum Cavity

The Astrophysical Journal Letters
In the past decade, the Atacama Large Millimeter/submillimeter Array (ALMA) has revealed a plethora of substructures in the disks surrounding young stars.
Charles H. Gardner, Andrea Isella, Hui Li, Shengtai Li, Jaehan Bae, Marcelo Barraza-Alfaro, Myriam Benisty, Gianni Cataldi, Pietro Curone, Josh A. Eisner, Stefano Facchini, Daniele Fasano, Mario Flock, Katherine B. Follette, Misato Fukagawa, Maria Galloway-Sprietsma, Himanshi Garg, Cassandra Hall, Jane Huang, John D. Ilee, Michael J. Ireland, Andrés F. Izquierdo, Christopher M. Johns-Krull, Kazuhiro Kanagawa, Adam L. Kraus, Geoffroy Lesur, Shangfei Liu, Cristiano Longarini, Ryan A. Loomis, Francois Menard, Ryuta Orihara, Christophe Pinte, Daniel Price, Luca Ricci, Giovanni Rosotti, Steph Sallum, Jochen Stadler, Richard Teague, Gaylor Wafflard-Fernandez, David J. Wilner, Andrew J. Winter, Lisa Wölfer, Hsi-Wei Yen, Tomohiro C. Yoshida, Brianna Zawadzki, Zhaohuan Zhu   +45 more
doaj   +1 more source