High Cadence TESS and ground-based data of SN 2019esa, the less energetic sibling of SN 2006gy

Abstract

We present photometric and spectroscopic observations of the nearby ($D\approx 28$ Mpc) interacting supernova (SN) 2019esa, discovered within hours of explosion and serendipitously observed by the Transiting Exoplanet Survey Satellite (TESS). Early, high cadence light curves from both TESS and the DLT40 survey tightly constrain the time of explosion, and show a 30 day rise to maximum light followed by a near constant linear decline in luminosity. Optical spectroscopy over the first 40 days revealed a highly reddened object with narrow Balmer emission lines seen in Type IIn supernovae. The slow rise to maximum in the optical lightcurve combined with the lack of broad H$\alpha$ emission suggest the presence of very optically thick and close circumstellar material (CSM) that quickly decelerated the supernova ejecta. This CSM was likely created from a massive star progenitor with an $\dot{M}$ $\sim$ 0.3 M${}_{\odot }$ yr${}^{-1}$ lost in a previous eruptive episode 3--4 years before eruption, similar to giant eruptions of luminous blue variable stars. At late times, strong intermediate-width Ca II, Fe I, and Fe II lines are seen in the optical spectra, identical to those seen in the superluminous interacting SN 2006gy. The strong CSM interaction masks the underlying explosion mechanism in SN 2019esa, but the combination of the luminosity, strength of the H$\alpha$ lines, and mass loss rate of the progenitor all point to a core collapse origin.

Submitted to ApJ 2022 May 21

References in corpus (27)

• The Transiting Exoplanet Survey Satellite
• Pulsational pair instability as an explanation for the most luminous supernovae
• SN 2006gy: An extremely luminous supernova in the galaxy NGC 1260
• SN 2006tf: Precursor Eruptions and the Optically Thick Regime of Extremely Luminous Type IIn Supernovae
• Shell-shocked diffusion model for the light curve of SN2006gy
• The Carnegie Supernova Project I: Third Photometry Data Release of Low-Redshift Type Ia Supernovae and Other White Dwarf Explosions
• Light Curve Modeling of Superluminous Supernova 2006gy: Collision between Supernova Ejecta and Dense Circumstellar Medium
• PTF11iqb: Cool supergiant mass loss that bridges the gap between Type IIn and normal supernovae
• Consistent estimates of (56)Ni yields for type Ia supernovae
• The Rising Light Curves of Type Ia Supernovae
• SN 2005 gj: Evidence for LBV supernovae progenitors?
• On The Intrinsic Diversity of Type II-Plateau Supernovae
• Supernova 2002ic: the collapse of a stripped-envelope, massive star in a dense medium ?
• Endurance of SN 2005ip after a decade: X-rays, radio, and H-alpha like SN 1988Z require long-lived pre-supernova mass loss
• SN 2015bh: NGC 2770's 4th supernova or a luminous blue variable on its way to a Wolf-Rayet star?
• On the Nature of Type Ia-CSM Supernovae: Optical and Near-Infrared Spectra of SN 2012ca and SN 2013dn
• An extremely energetic supernova from a very massive star in a dense medium
• A Type Ia supernova at the heart of superluminous transient SN 2006gy
• Optical and IR observations of SN 2013L, a Type IIn Supernova surrounded by asymmetric CSM
• SN 2009ip after a decade: The luminous blue variable progenitor is now gone
• High-Cadence, Early-Time Observations of Core-Collapse Supernovae From the TESS Prime Mission
• Massive stars dying alone: The extremely remote environment of SN 2009ip
• The Iron Yield of Normal Type II Supernovae
• The Slow Demise of the Long-Lived SN 2005ip
• A systematic reclassification of type IIn supernovae
• PTF11kx: A Type Ia Supernova with Hydrogen Emission Persisting After 3.5 Years
• The Carnegie Supernova Project II. Observations of the intermediate luminosity red transient SNhunt120

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