Volumetric Rates of Luminous Red Novae and Intermediate-luminosity Red Transients with the Zwicky Transient Facility

VR Karambelkar, MM Kasliwal… - The Astrophysical …, 2023 - iopscience.iop.org
VR Karambelkar, MM Kasliwal, N Blagorodnova, J Sollerman, R Aloisi, SG Anand…
The Astrophysical Journal, 2023iopscience.iop.org
Luminous red novae (LRNe) are transients characterized by low luminosities and expansion
velocities, and they are associated with mergers or common-envelope ejections in stellar
binaries. Intermediate-luminosity red transients (ILRTs) are an observationally similar class
with unknown origins, but they are generally believed to be either electron-capture
supernovae in super-asymptotic giant branch stars or outbursts in dusty luminous blue
variables (LBVs). In this paper, we present a systematic sample of eight LRNe and eight …
Abstract
Luminous red novae (LRNe) are transients characterized by low luminosities and expansion velocities, and they are associated with mergers or common-envelope ejections in stellar binaries. Intermediate-luminosity red transients (ILRTs) are an observationally similar class with unknown origins, but they are generally believed to be either electron-capture supernovae in super-asymptotic giant branch stars or outbursts in dusty luminous blue variables (LBVs). In this paper, we present a systematic sample of eight LRNe and eight ILRTs detected as part of the Census of the Local Universe (CLU) experiment on the Zwicky Transient Facility (ZTF). The CLU experiment spectroscopically classifies ZTF transients associated with nearby (< 150 Mpc) galaxies, achieving 80% completeness for m r< 20 mag. Using the ZTF-CLU sample, we derive the first systematic LRNe volumetric rate of
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