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Discovery of optical and infrared accretion disc wind signatures in the black hole candidate MAXI J1348–630

Astronomy & Astrophysics EDP Sciences 664 (2022) a100

Authors:

G Panizo-Espinar, M Armas Padilla, T Muñoz-Darias, KII Koljonen, VA Cúneo, J Sánchez-Sierras, D Mata Sánchez, J Casares, J Corral-Santana, RP Fender, F Jiménez-Ibarra, G Ponti, D Steeghs, MAP Torres
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The Fornax3D project: Discovery of ancient massive merger events in the Fornax cluster galaxies NGC 1380 and NGC 1427

Astronomy & Astrophysics EDP Sciences 664 (2022) a115

Authors:

Ling Zhu, Glenn van de Ven, Ryan Leaman, Annalisa Pillepich, Lodovico Coccato, Yuchen Ding, Jesús Falcón-Barroso, Enrichetta Iodice, Ignacio Martin Navarro, Francesca Pinna, Enrico Maria Corsini, Dimitri A Gadotti, Katja Fahrion, Mariya Lyubenova, Shude Mao, Richard McDermid, Adriano Poci, Marc Sarzi, Tim de Zeeuw
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VLBI observations of GRB 201015A, a relatively faint GRB with a hint of very high-energy gamma-ray emission

Astronomy & Astrophysics EDP Sciences 664 (2022) a36

Authors:

S Giarratana, L Rhodes, B Marcote, R Fender, G Ghirlanda, M Giroletti, L Nava, JM Paredes, ME Ravasio, M Ribó, M Patel, J Rastinejad, G Schroeder, W Fong, BP Gompertz, AJ Levan, P O’Brien
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Quantification of Unknown Unknowns in Astronomy and Physics

ArXiv 2207.13993 (2022)
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SN 2016dsg: A Thermonuclear Explosion Involving a Thick Helium Shell

The Astrophysical Journal American Astronomical Society 934:2 (2022) 102-102

Authors:

Yize Dong, Stefano Valenti, Abigail Polin, Aoife Boyle, Andreas Flörs, Christian Vogl, Wolfgang E Kerzendorf, David J Sand, Saurabh W Jha, Łukasz Wyrzykowski, K Azalee Bostroem, Jeniveve Pearson, Curtis McCully, Jennifer E Andrews, Stefano Benetti, Stéphane Blondin, L Galbany, Mariusz Gromadzki, Griffin Hosseinzadeh, D Andrew Howell, Cosimo Inserra, Jacob E Jencson, Michael Lundquist, JD Lyman, Mark Magee, Kate Maguire, Nicolas Meza, Shubham Srivastav, Stefan Taubenberger, JH Terwel, Samuel Wyatt, DR Young

Abstract:

Abstract A thermonuclear explosion triggered by a He-shell detonation on a carbon–oxygen white-dwarf core has been predicted to have strong UV line blanketing at early times due to the iron-group elements produced during He-shell burning. We present the photometric and spectroscopic observations of SN 2016dsg, a subluminous peculiar Type I supernova consistent with a thermonuclear explosion involving a thick He shell. With a redshift of 0.04, the i -band peak absolute magnitude is derived to be around −17.5. The object is located far away from its host, an early-type galaxy, suggesting it originated from an old stellar population. The spectra collected after the peak are unusually red, show strong UV line blanketing and weak O i λ 7773 absorption lines, and do not evolve significantly over 30 days. An absorption line around 9700–10500 Å is detected in the near-infrared spectrum and is likely from the unburnt He in the ejecta. The spectroscopic evolution is consistent with the thermonuclear explosion models for a sub-Chandrasekhar-mass white dwarf with a thick He shell, while the photometric evolution is not well described by existing models.
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