SN 2009ip after a decade: The luminous blue variable progenitor is now gone

Abstract

We present new HST imaging photometry for the site of the Type IIn supernova (SN) 2009ip taken almost a decade after explosion. The optical source has continued to fade steadily since the SN-like event in 2012. In the F606W filter, which was also used to detect its luminous blue variable (LBV) progenitor 13~yr before the SN, the source at the position of SN2009ip is now 1.2mag fainter than that quiescent progenitor. It is 6-7mag fainter than the pre-SN outbursts in 2009--2011. This definitively rules out a prediction that the source would return to its previous state after surviving the 2012 event. Instead, the late-time fading matches expectations for a terminal explosion. The source fades at a similar rate in all visual-wavelength filters without significant color changes, therefore also ruling out the hypothesis of a luminous dust-obscured survivor or transition to a hotter post-LBV survivor. The late-time continuum with steady color and strong H$\alpha$ emission detected in a narrow F657N filter are, however, entirely expected for ongoing shock interaction with circumstellar material in a decade-old core-collapse SN. Interestingly, the ultraviolet flux has stayed nearly constant since 2015, supporting previous conjectures that the F275W light traces main-sequence OB stars in an underlying young star cluster. We expect that the visual-wavelength continuum will eventually level off, tracing this cluster light. Without any additional outbursts, it seems prudent to consider the 2012 event as a terminal SN explosion, and we discuss plausible scenarios.

arXiv comment11 pages, accepted by MNRAS June 10

References in corpus (79)

• Starburst99: Synthesis Models for Galaxies with Active Star Formation
• Mass Loss: Its Effect on the Evolution and Fate of High-Mass Stars
• WFPC2 Stellar Photometry with HSTphot
• Pulsational Pair-Instability Supernovae
• Observational constraints on the progenitors of core-collapse supernovae : the case for missing high mass stars
• Observed Fractions of Core-Collapse Supernova Types and Initial Masses of their Single and Binary Progenitor Stars
• V1309 Scorpii: merger of a contact binary
• The Panchromatic Hubble Andromeda Treasury
• The Unprecedented 2012 Outburst of SN 2009ip: A Luminous Blue Variable Becomes a True Supernova
• Interacting Supernovae and Supernova Impostors. SN 2009ip, is this the end?
• Luminous Blue Variable eruptions and related transients: Diversity of progenitors and outburst properties
• Preparing for an Explosion: Hydrodynamic Instabilities and Turbulence in Presupernovae
• A panchromatic view of the restless SN2009ip reveals the explosive ejection of a massive star envelope
• Discovery of Precursor LBV Outbursts in Two Recent Optical Transients: The Fitfully Variable Missing Links UGC 2773-OT and SN 2009ip
• Common Envelope Evolution Leading to Supernovae with Dense Interaction
• An outburst from a massive star 40 days before a supernova explosion
• Shell-shocked diffusion model for the light curve of SN2006gy
• Helium Star/Black Hole Mergers: a New Gamma-Ray Burst Model
• Coronal lines and dust formation in SN 2005ip: Not the brightest, but the hottest Type IIn supernova
• The Pair-Instability Mass Gap for Black Holes
• Luminous Blue Variables are Antisocial: Their Isolation Implies that they are Kicked Mass Gainers in Binary Evolution
• Multi-wavelength Observations of the Enduring Type IIn Supernovae 2005ip and 2006jd
• Latitude-dependent effects in the stellar wind of Eta Carinae
• Interacting Supernovae: Types IIn and Ibn
• SN 2009ip and SN 2010mc: Core-collapse Type IIn supernovae arising from blue supergiants
• Optical and Ultraviolet Spectroscopy of SN 1995N: Evidence for Strong Circumstellar Interaction
• Eruptions of the V838 Mon type: stellar merger versus nuclear outburst models
• V1309 SCO - Understanding a merger
• SN 2009ip á la PESSTO: No evidence for core-collapse yet
• Binary Stellar Mergers with Marginally-Bound Ejecta: Excretion Disks, Inflated Envelopes, Outflows, and their Luminous Transients
• Shock-powered light curves of luminous red novae as signatures of pre-dynamical mass loss in stellar mergers
• On The Intrinsic Diversity of Type II-Plateau Supernovae
• A Revised Historical Light Curve of Eta Carinae and the Timing of Close Periastron Encounters
• Uncovering the Putative B-Star Binary Companion of the SN 1993J Progenitor
• The luminosities of cool supergiants in the Magellanic Clouds, and the Humphreys-Davidson limit revisited
• A meta analysis of core-collapse supernova ${}^{56}$Ni masses
• A Blast Wave from the 1843 Eruption of Eta Carinae
• Multi-epoch spectropolarimetry of SN 2009ip: direct evidence for aspherical circumstellar material
• Massive-Star Mergers and the Recent Transient in NGC4490: A More Massive Cousin of V838 Mon and V1309 Sco
• Pre-explosion spiral mass loss of a binary star merger
• Explosions Driven by the Coalescence of a Compact Object with the Core of a Massive-Star Companion Inside a Common Envelope: Circumstellar Properties, Light Curves, and Population Statistics
• Predictions for the hydrogen-free ejecta of pulsational pair-instability supernovae
• The Rise of the Remarkable Type IIn Supernova SN 2009ip
• Violent Stellar Merger Model for Transient Events
• Dead or Alive? Long-term evolution of SN 2015bh (SNhunt275)
• Late-Time Circumstellar Interaction in a Spitzer Selected Sample of Type IIn Supernovae
• Clues To The Nature of SN 2009ip from Photometric and Spectroscopic Evolution to Late Times
• Explaining the supernova impostor sn 2009ip as mergerburst
• Endurance of SN 2005ip after a decade: X-rays, radio, and H-alpha like SN 1988Z require long-lived pre-supernova mass loss
• Burying a Binary: Dynamical Mass Loss and a Continuous Optically-Thick Outflow Explain the Candidate Stellar Merger V1309 Scorpii
• Connecting the progenitors, pre-explosion variability, and giant outbursts of luminous blue variables with Gaia16cfr
• Light-echoes from the plateau in Eta Carinae's Great Eruption reveal a two-stage shock-powered event
• Explosions Triggered by Violent Binary-Star Collisions: Application to Eta Carinae and other Eruptive Transients
• The Supernova Impostor Impostor SN 1961V: Spitzer Shows That Zwicky Was Right (Again)
• On the Nature of Type Ia-CSM Supernovae: Optical and Near-Infrared Spectra of SN 2012ca and SN 2013dn
• SN 2009ip at late times - an interacting transient at +2 years
• Ultraviolet Detection of the Binary Companion to the Type IIb SN 2001ig
• Powering the Second 2012 Outburst of SN 2009ip by Repeating Binary Interaction
• Discrepancies in the ages of young star clusters; evidence for mergers?
• SDSS1133: An Unusually Persistent Transient in a Nearby Dwarf Galaxy
• Progenitor, Precursor and Evolution of the Dusty Remnant of the Stellar Merger M31-LRN-2015
• Optical and IR observations of SN 2013L, a Type IIn Supernova surrounded by asymmetric CSM
• A spectroscopic event of eta Car viewed from different directions: The data and first results
• Modelling Luminous-Blue-Variable Isolation
• Catching a star before explosion: the luminous blue variable progenitor of SN 2015bh
• Anisotropic mass ejection in binary mergers
• Constraints on Type IIn Supernova Progenitor Outbursts from the Lick Observatory Supernova Search
• Massive stars dying alone: The extremely remote environment of SN 2009ip
• Near-Infrared Spectroscopy of SN2009ip's 2012 Brightening Reveals a Dusty Pre-Supernova Environment
• An environmental analysis of the Type Ib SN 2019yvr and the possible presence of an inflated binary companion
• Exceptionally fast ejecta seen in light echoes of Eta Carinae's Great Eruption
• Clues to the Nature of SN 2009ip II: The Continuing Photometric and Spectroscopic Evolution to 1000 Days
• The Slow Demise of the Long-Lived SN 2005ip
• The origin of the late-time luminosity of supernova 2011dh
• Red Supergiants in M31: The Humphreys-Davidson limit at high metallicity
• SN 2009ip: Constraining the latest explosion properties by its late-phase light curve
• The Candidate Progenitor Companion Star of the Type Ib/c SN 2013ge
• Accelerating very fast gas in the supernova impostor sn 2009ip with jets from a stellar companion
• An outburst powered by the merging of two stars inside the envelope of a giant

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