D. Farias

Blast: A Web Application for Characterizing the Host Galaxies of Astrophysical Transients

D. O. Jones, P. McGill, T. Andrew Manning, Alexander Gagliano et autres

Abstract Characterizing the host galaxies of astrophysical transients is important to many areas of astrophysics, including constraining the progenitor systems of core-collapse supernovae, correcting Type Ia supernova distances, and probabilistically classifying transients without photometric or spectroscopic data. Given the increasing transient discovery …

us, ru, dk, gb (code pays fourni par la source)

Characterization of Type Ibn Supernovae

D. Farias, C. Gall, V. Ashley Villar, K. Auchettl et autres

Context . Type Ibn supernovae (SNe) are characterized by narrow helium (He I ) lines from photons produced by the unshocked circumstellar material (CSM). About 80 SNe Ibn have been discovered to date and only a handful of them have extensive observational …

dk, us, au, bg, il, gb, tw, se, it, th (code pays fourni par la source)

Spectral Diversity in Type Ibn Supernovae and the Large Host Offset of SN2024acyl

Yize Dong, V. Ashley Villar, Anya E. Nugent, G. Hosseinzadeh et autres

In this paper, we first present observations of SN~2024acyl, a normal Type Ibn supernova with a large projected offset ($\sim$35~kpc) from its host galaxy. The low star-formation rate measured at the explosion site raises the possibility that the progenitor of SN~2024acyl may …

Evidence for an Instability-Induced Binary Merger in the Double-Peaked, Helium-Rich Type IIn Supernova 2023zkd

Alexander Gagliano, Takuma Matsumoto, C. L. Ransome, Anya E. Nugent et autres

We present ultraviolet to infrared observations of the extraordinary Type IIn supernova 2023zkd (SN 2023zkd). Photometrically, it exhibits persistent and luminous precursor emission spanning $\sim$4 years preceding discovery ($M_r\approx-15$ mag, 1,500~days in the observer frame), followed by a secondary stage of gradual …

Anomaly Detection and Approximate Similarity Searches of Transients in Real-time Data Streams

P. Aleo, A. W. Engel, Gautham Narayan, C. R. Angus et autres

This is the official Zenodo version of the code LAISS (Lightcurve Anomaly Identification and Similarity Search), associated with the paper, "Anomaly Detection and Approximate Similarity Searches of Transients in Real-time Data Streams" by Aleo et al (in review). This repository contains all …

Final Moments II: Observational Properties and Physical Modeling of CSM-Interacting Type II Supernovae

W. V. Jacobson-Galán, Luc Dessart, Kyle W. Davis, C. D. Kilpatrick et autres

We present ultraviolet/optical/near-infrared observations and modeling of Type II supernovae (SNe II) whose early-time ($δt < 2$ days) spectra show transient, narrow emission lines from shock ionization of confined ($r < 10^{15}$ cm) circumstellar material (CSM). The observed electron-scattering broadened line profiles …

fr (code pays fourni par la source)

SN2023ixf in Messier 101: the twilight years of the progenitor as seen by Pan-STARRS

C. L. Ransome, V. Ashley Villar, Anna Tartaglia, S. González et autres

The nearby type II supernova, SN2023ixf in M101 exhibits signatures of early-time interaction with circumstellar material in the first week post-explosion. This material may be the consequence of prior mass loss suffered by the progenitor which possibly manifested in the form of …

SN 2022oqm: A Bright and Multi-peaked Calcium-rich Transient

S. K. Yadavalli, V. Ashley Villar, L. Izzo, Yossef Zenati et autres

We present the photometric and spectroscopic evolution of SN 2022oqm, a nearby multi-peaked hydrogen- and helium-weak calcium-rich transient (CaRT). SN 2022oqm was detected 13.1 kpc from its host galaxy, the face-on spiral galaxy NGC 5875. Extensive spectroscopic coverage reveals an early hot …

A Low-Mass Helium Star Progenitor Model for the Type Ibn SN 2020nxt

Qinan Wang, Anika Goel, Luc Dessart, Ori D. Fox et autres

A growing number of supernovae (SNe) are now known to exhibit evidence for significant interaction with a dense, pre-existing, circumstellar medium (CSM). SNe Ibn comprise one such class that can be characterised by both rapidly evolving light curves and persistent narrow He …

The Young Supernova Experiment Data Release 1 (YSE DR1): Light Curves and Photometric Classification of 1975 Supernovae

P. D. Aleo, Konstantin Malanchev, Sammy N. Sharief, D. O. Jones et autres

We present the Young Supernova Experiment Data Release 1 (YSE DR1), comprised of processed multi-color Pan-STARRS1 (PS1) griz and Zwicky Transient Facility (ZTF) gr photometry of 1975 transients with host-galaxy associations, redshifts, spectroscopic/photometric classifications, and additional data products from 2019 November 24 …

SN 2022ann: A type Icn supernova from a dwarf galaxy that reveals helium in its circumstellar environment

K. W. Davis, K. Taggart, Samaporn Tinyanont, R. J. Foley et autres

We present optical and near-infrared (NIR) observations of the Type Icn supernova (SN Icn) 2022ann, the fifth member of its newly identified class of SNe. Its early optical spectra are dominated by narrow carbon and oxygen P-Cygni features with absorption velocities of …