Hintze Centre for Astrophysical Surveys: publications

Measuring the Ejecta Velocities of Type Ia Supernovae from the Pan-STARRS1 Medium Deep Survey

(2022)

Authors:

Y-C Pan, Y-S Jheng, DO Jones, I-Y Lee, RJ Foley, R Chornock, DM Scolnic, E Berger, PM Challis, M Drout, ME Huber, RP Kirshner, R Kotak, R Lunnan, G Narayan, A Rest, S Rodney, S Smartt

MIGHTEE: Deep 1.4 GHz Source Counts and the Sky Temperature Contribution of Star Forming Galaxies and Active Galactic Nuclei

(2022)

Authors:

CL Hale, IH Whittam, MJ Jarvis, PN Best, NL Thomas, I Heywood, M Prescott, N Adams, J Afonso, Fangxia An, RAA Bowler, JD Collier, RHW Cook, R Davé, BS Frank, M Glowacki, PW Hatfield, S Kolwa CC Lovell, N Maddox, L Marchetti, LK Morabito, E Murphy, I Prandoni, Z Randriamanakoto, AR Taylor

Optical studies of a bright Type Iax supernova SN 2020rea

Monthly Notices of the Royal Astronomical Society Oxford University Press (OUP) 517:4 (2022) 5617-5626

Authors:

Mridweeka Singh, Kuntal Misra, Devendra K Sahu, Bhavya Ailawadhi, Anirban Dutta, D Andrew Howell, GC Anupama, K Azalee Bostroem, Jamison Burke, Raya Dastidar, Anjasha Gangopadhyay, Daichi Hiramatsu, Hyobin Im, Curtis McCully, Craig Pellegrino, Shubham Srivastav, Rishabh Singh Teja

Abstract:

ABSTRACTWe present optical photometric and spectroscopic analysis of a Type Iax supernova (SN) 2020rea situated at the brighter luminosity end of Type Iax supernovae (SNe). The light curve decline rate of SN 2020rea is Δm15(g) = 1.31 ± 0.08 mag which is similar to SNe 2012Z and 2005hk. Modelling the pseudo-bolometric light curve with a radiation diffusion model yields a mass of 56Ni of 0.13 ± 0.01 M⊙ and an ejecta mass of 0.77$^{+0.11}_{-0.21}$ M⊙. Spectral features of SN 2020rea during the photospheric phase show good resemblance with SN 2012Z. TARDIS modelling of the early spectra of SN 2020rea reveals a dominance of Iron Group Elements (IGEs). The photospheric velocity of the Si ii line around maximum for SN 2020rea is ∼ 6500 km s−1 which is less than the measured velocity of the Fe ii line and indicates significant mixing. The observed physical properties of SN 2020rea match with the predictions of pure deflagration model of a Chandrasekhar mass C–O white dwarf. The metallicity of the host galaxy around the SN region is 12 + log(O/H) = 8.56 ± 0.18 dex which is similar to that of SN 2012Z.

Testing afterglow models of FRB 200428 with early post-burst observations of SGR 1935 + 2154

Monthly Notices of the Royal Astronomical Society Oxford University Press (OUP) 517:4 (2022) 5483-5495

Authors:

AJ Cooper, A Rowlinson, RAMJ Wijers, C Bassa, K Gourdji, J Hessels, AJ van der Horst, V Kondratiev, D Michilli, Z Pleunis, T Shimwell, S ter Veen

Revealing the progenitor of SN 2021zby through analysis of the $TESS$ shock-cooling light curve

(2022)

Authors:

Qinan Wang, Patrick Armstrong, Yossef Zenati, Ryan Ridden-Harper, Armin Rest, Iair Arcavi, Charles D Kilpatrick, Ryan J Foley, Brad E Tucker, Chris Lidman, Thomas L Killestein, Melissa Shahbandeh, Joseph P Anderson, Chris Ashall, Jamison Burke, Ting-wan Chen, Kyle A Dalrymple, Kyle W Davis, Michael D Fulton, Lluís Galbany, Mariusz Gromadzki, Nada Ihanec, Jacob E Jencson, David O Jones, Joseph D Lyman, Tomás E Müller-bravo, Megan Newsome, Matt Nicholl, David O'neill, Craig Pellegrino, Sofia Rest, Stephen J Smartt, Ken Smith, Shubham Srivastav, Samaporn Tinyanont, David R Young, Alfredo Zenteno

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