Radio Emission from SN 1988Z and Very Massive Star Evolution

Abstract

We present observations of the radio emission from the unusual SN 1988Z made with the VLA from 385 to 4,438 days after explosion. SN 1988Z is the most distant radio supernova ever detected. The radio light curves are well-described by a model involving the blastwave interacting with a high-density circumstellar cocoon, which consists almost entirely of clumps or filaments. However, at age ~ 1750 days the SN declines much more rapidly than expected, without a change in absorption parameters. This is due to a change in the number density of circum- stellar clumps without a change in the average properties of each clump. This also represents a change in the presupernova stellar wind properties ~ 10,000 yr before explosion. A massive wind (Mdot >~ 10^{-4} Msun/yr) and very high ZAMS mass, ~ 20--30 Msun, is implied for the SN progenitor, similar to what is likely the case for SNe 1986J and 1998bw.

11 pages, 3 figures, ApJ, in press (2002 Dec 10)

Cited by in corpus (42)

• The Zwicky Transient Facility: Science Objectives
• SN 2006gy: Discovery of the most luminous supernova ever recorded, powered by the death of an extremely massive star like Eta Carinae
• Red supergiants as potential Type IIn supernova progenitors: Spatially resolved 4.6 micron CO emission around VY CMa and Betelgeuse
• Coronal lines and dust formation in SN 2005ip: Not the brightest, but the hottest Type IIn supernova
• Spectral Evolution of the Extraordinary Type IIn Supernova 2006gy
• The Radio and X-ray Luminous SN 2003bg and the Circumstellar Density Variations Around Radio Supernovae
• SN 1994W: An Interacting Supernova or Two Interacting Shells?
• Thermal and non-thermal emission from circumstellar interaction
• A Deep Search for Prompt Radio Emission from Thermonuclear Supernovae with the Very Large Array
• Numerical models of collisions between core-collapse supernovae and circumstellar shells
• A Search for Radio Emission from Type Ia Supernovae
• Long Term Radio Monitoring of SN 1993J
• Radio and X-ray observations of SN 2006jd: Another strongly interacting Type IIn supernova
• Endurance of SN 2005ip after a decade: X-rays, radio, and H-alpha like SN 1988Z require long-lived pre-supernova mass loss
• Multi-frequency Radio Measurements of SN 1987A over 22 Years
• The Dual-Axis Circumstellar Environment of the Type IIn Supernova 1997eg
• The Radio Luminosity-Risetime Function of Core-Collapse Supernovae
• Radio Observations Reveal Unusual Circumstellar Environments for Some Type Ibc Supernova Progenitors
• SN 2008iy: An Unusual Type IIn Supernova with an Enduring 400 Day Rise Time
• Constraints on Off-Axis GRB Jets in Type Ibc Supernovae From Late-Time Radio Observations
• Circumstellar interaction in supernovae in dense environments - an observational perspective
• AT 2017gbl: a dust obscured TDE candidate in a luminous infrared galaxy
• Eleven years of radio monitoring of the Type IIn supernova SN 1995N
• Supernova Interaction with a Dense Detached Shell in SN 2001em
• A Chandra ACIS Observation of the X-ray Luminous SN1988Z
• Deep VLBI Imaging of Faint Radio Sources in the NOAO Bootes Field
• Seven Years of SN 2014C: a Multi-Wavelength Synthesis of an Extraordinary Supernova
• Supernova PTF12glz: a possible shock breakout driven through an aspherical wind
• The Radio Evolution of SN 2001gd
• Late-Time Dust Emission from the Type IIn Supernova 1995N
• Unveiling the Nature of SN 2011fh: a Young and Massive Star Gives Rise to a Luminous SN 2009ip-like Event
• Early Ultra-Violet observations of type IIn supernovae constrain the asphericity of their circumstellar material
• Multi-Epoch Very Long Baseline Interferometric Observations of the Nuclear Starburst Region of NGC 253: Improved modelling of the supernova and star-formation rates
• A Search for Infrared Emission from Core-Collapse Supernovae at the Transitional Phase
• A Snapshot Survey of Nearby Supernovae with the Hubble Space Telescope
• Discovery of a radio transient in M81
• On the optical counterparts of radio transients and variables
• VLBA Astrometry of Compact Radio Sources in the Spitzer First-Look Survey
• M94 As A Unique Testbed for Black Hole Mass Estimates and AGN Activity At Low Luminosities
• MERLIN and VLA Observations of VII Zw 19: Distant Cousin of M82
• SN 1978K: An evolved supernova outside our Local Group detected at millimetre wavelengths
• Fading Echoes of Interaction: Probing Centuries of Preexplosion Mass-Loss in Four Type IIn Supernovae