Hintze Centre for Astrophysical Surveys

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The MAGPI Survey: Impact of environment on the total internal mass distribution of galaxies in the last 5 Gyr

ArXiv 2306.0963 (2023)

Authors:

Caro Derkenne, Richard M McDermid, Adriano Poci, J Trevor Mendel, Francesco D'Eugenio, Seyoung Jeon, Rhea-Silvia Remus, Sabine Bellstedt, Andrew J Battisti, Joss Bland-Hawthorn, Anna Ferre-Mateu, Caroline Foster, KE Harborne, Claudia DP Lagos, Yingjie Peng, Piyush Sharda, Gauri Sharma, Sarah Sweet, Kim-Vy H Tran, Lucas M Valenzuela, Sam Vaughan, Emily Wisnioski, Sukyoung K Yi
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SN2023ixf in Messier 101: A Variable Red Supergiant as the Progenitor Candidate to a Type II Supernova

(2023)

Authors:

Charles D Kilpatrick, Ryan J Foley, Wynn V Jacobson-Galán, Anthony L Piro, Stephen J Smartt, Maria R Drout, Alexander Gagliano, Christa Gall, Jens Hjorth, David O Jones, Kaisey S Mandel, Raffaella Margutti, Conor L Ransome, V Ashley Villar, David A Coulter, Hua Gao, David Jacob Matthews, Yossef Zenati
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A Sensitive Search for Supernova Emission Associated with the Extremely Energetic and Nearby GRB 221009A

The Astrophysical Journal Letters American Astronomical Society 949:2 (2023) l39

Authors:

Gokul P Srinivasaragavan, Brendan O’Connor, S Bradley Cenko, Alexander J Dittmann, Sheng Yang, Jesper Sollerman, GC Anupama, Sudhanshu Barway, Varun Bhalerao, Harsh Kumar, Vishwajeet Swain, Erica Hammerstein, Isiah Holt, Shreya Anand, Igor Andreoni, Michael W Coughlin, Simone Dichiara, Avishay Gal-Yam, M Coleman Miller, Jaime Soon, Roberto Soria, Joseph Durbak, James H Gillanders, Sibasish Laha, Anna M Moore, Fabio Ragosta, Eleonora Troja
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A structured jet explains the extreme GRB 221009A.

Science advances 9:23 (2023) eadi1405

Authors:

Brendan O'Connor, Eleonora Troja, Geoffrey Ryan, Paz Beniamini, Hendrik van Eerten, Jonathan Granot, Simone Dichiara, Roberto Ricci, Vladimir Lipunov, James H Gillanders, Ramandeep Gill, Michael Moss, Shreya Anand, Igor Andreoni, Rosa L Becerra, David AH Buckley, Nathaniel R Butler, Stephen B Cenko, Aristarkh Chasovnikov, Joseph Durbak, Carlos Francile, Erica Hammerstein, Alexander J van der Horst, Mansi M Kasliwal, Chryssa Kouveliotou, Alexander S Kutyrev, William H Lee, Gokul P Srinivasaragavan, Vladislav Topolev, Alan M Watson, Yuhan Yang, Kirill Zhirkov

Abstract:

Long-duration gamma-ray bursts (GRBs) are powerful cosmic explosions, signaling the death of massive stars. Among them, GRB 221009A is by far the brightest burst ever observed. Because of its enormous energy (Eiso ≈ 1055 erg) and proximity (z ≈ 0.15), GRB 221009A is an exceptionally rare event that pushes the limits of our theories. We present multiwavelength observations covering the first 3 months of its afterglow evolution. The x-ray brightness decays as a power law with slope ≈t-1.66, which is not consistent with standard predictions for jetted emission. We attribute this behavior to a shallow energy profile of the relativistic jet. A similar trend is observed in other energetic GRBs, suggesting that the most extreme explosions may be powered by structured jets launched by a common central engine.
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Synchrotron emission from double-peaked radio light curves of the symbiotic recurrent nova V3890 Sagitarii

Monthly Notices of the Royal Astronomical Society Oxford University Press (OUP) 523:2 (2023) 1661-1675

Authors:

Miriam M Nyamai, Justin D Linford, James R Allison, Laura Chomiuk, Patrick A Woudt, Valério ARM Ribeiro, Sumit K Sarbadhicary
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