Journal article
ZTF-observed late-time signals of pre-ZTF transients
Astronomy and astrophysics (Berlin), v 697, A143
01 May 2025
Abstract
With large-scale surveys such as the Zwicky Transient Facility (ZTF), it has become possible to obtain a well-sampled light curve spanning the full length of the survey for any discovery within the survey footprint. Similarly, any transient within the footprint that was first detected before the start of the survey will likely have a large number of post-transient observations, making such transients excellent targets to search for the presence of late-time signals, particularly those due to interaction with circumstellar material (CSM). We searched for late-time signals in a sample of 7718 transients, mainly supernovae (SNe), that were first detected during the 10 years before the start of ZTF, aiming to find objects showing signs of late-time interaction with CSM. We found one candidate whose late-time signal is best explained by late-time CSM interaction, with the signal being around 300 days after transient discovery. A thin, distant shell containing less than or similar to 5 M-circle dot of material could explain the recovered signal. We also found five objects whose late-time signal is best explained by faint nuclear transients occurring in host nuclei close to the pre-ZTF transient locations. Finally, we found two objects where it is difficult to determine whether the signal is from a nuclear transient or due to late-time CSM interaction occurring over 5 years after the SN. This study demonstrates the ability of large-scale surveys to find faint transient signals for a variety of objects and uncover a population of previously unknown sources. However, the large number of non-detections shows that strong late-time CSM interaction occurring years after the SN explosion is extremely rare.
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Details
- Title
- ZTF-observed late-time signals of pre-ZTF transients
- Creators
- Jacco H. Terwel - Univ Dublin, Trinity Coll Dublin, Sch Phys, Dublin, IrelandKate Maguire - Univ Dublin, Trinity Coll Dublin, Sch Phys, Dublin, IrelandJesper Sollerman - Stockholm UniversityPhil Wiseman - Univ Southampton, Sch Phys & Astron, Southampton SO17 1BJ, EnglandTracy X. Chen - California Institute of TechnologyMatthew J. Graham - California Institute of TechnologyRuss R. Laher - Infrared Processing and Analysis CenterReed Riddle - California Institute of TechnologyNiharika Sravan - Drexel University, Physics
- Publication Details
- Astronomy and astrophysics (Berlin), v 697, A143
- Publisher
- Edp Sciences S A
- Number of pages
- 21
- Grant note
- Max-Planck Society; Max Planck Society Space Telescope Science Institute Queen's University Belfast ST/R000506/1; ST/Y001850/1 / Science and Technology Facilities Council (STFC); UK Research & Innovation (UKRI); Science & Technology Facilities Council (STFC); Science and Technology Development Fund (STDF) Oskar Klein Center at Stockholm University National Central University of Taiwan University of Wisconsin (Milwaukee) Max Planck Institute for Extraterrestrial Physics AST-1238877 / National Science Foundation; National Science Foundation (NSF) Los Alamos National Laboratory; United States Department of Energy (DOE)
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Physics
- Web of Science ID
- WOS:001488693800023
- Scopus ID
- 2-s2.0-105005515080
- Other Identifier
- 991022048373204721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Astronomy & Astrophysics