The Nature and Geometry of the Light Echo from SN 2006X

Abstract

We report on the discovery of the geometry producing the light echo emanating from Supernova 2006X, a nearby but underluminous Type Ia in M100 (= NGC 4321). This offers a rare chance to study the environment of a Type Ia supernova. Contrary to previous reports, there is little evidence of a circumstellar component in the light echo morphology or in the light curve of the unresolved SN point source. Instead, the obvious and dominant echo contribution comes from what is probably a relatively thin sheet of material some 26 pc in front of SN 2006X. Of the four known Type Ia light echoes, three show no evidence of a circumstellar echo and the fourth needs to be confirmed. We consider other evidence for circumstellar material around SN Ia, which may be rare.

arXiv comment17 pages, 2 figures, submitted to Astrophysical Journal Letters

References in corpus (30)

• Final Results from the Hubble Space Telescope Key Project to Measure the Hubble Constant
• Two populations of progenitors for type Ia SNe?
• Evidence for an asymptotic giant branch star in the progenitor system of a type Ia supernova
• Detection of circumstellar material in a normal Type Ia Supernova
• Nearby Supernova Factory Observations of SN 2005gj: Another Type Ia Supernova in a Massive Circumstellar Envelope
• A Search for Environmental Effects on Type Ia Supernovae
• The Morphology of Type Ia Supernovae Light Curves
• Spectropolarimetry of SN 2001el in NGC 1448: Asphericity of a Normal Type Ia Supernova
• Optical and Near-Infrared Observations of the Highly Reddened, Rapidly Expanding Type Ia Supernova 2006X in M100
• Early and late time VLT spectroscopy of SN 2001el - progenitor constraints for a type Ia supernova
• Evolution of 3-9 Mo Stars for Z=0.001 - 0.03 and Metallicity Effects on Type Ia Supernovae
• SN 2003du: Signatures of the Circumstellar Environment in a Normal Type Ia Supernova?
• Cepheid calibration of type Ia Supernovae and the Hubble constant
• A Search for Radio Emission from Type Ia Supernovae
• Supernova 2002ic: the collapse of a stripped-envelope, massive star in a dense medium ?
• The Detection of a Light Echo from the Type Ia Supernova 2006X in M100
• Reflections on Reflexions: I. Light Echoes in Type Ia Supernovae
• High velocity features in the spectra of the Type Ia SN 1999ee: a property of the explosion or evidence of circumstellar interaction?
• X-Ray Observations of Type Ia Supernovae with Swift: Evidence for Circumstellar Interaction for SN 2005ke
• Observability of Scattered-Light Echoes Around Variable Stars and Cataclysmic Events
• Classifications of the Host Galaxies of Supernovae, Set III
• Constraining Cosmic Evolution of Type Ia Supernovae
• Importance of Supernovae at z>1.5 to Probe Dark Energy
• On the fraction of intermediate-mass close binaries that explode as type-Ia supernovae
• SN 2005cg: Explosion Physics and Circumstellar Interaction of a Normal Type Ia Supernova in a Low-Luminosity Host
• Late Light Curves of Normal Type Ia Supernovae
• Why Are Radio-Galaxies Prolific Producers of Type Ia Supernovae?
• Reflections on Reflexions: II. Effects of Light Echoes on the luminosity and spectra of Type Ia Supernovae
• Circumstellar Na I and Ca II lines of type Ia supernovae in symbiotic scenario
• Upper limit for circumstellar gas around the Type Ia SN 2000cx

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• Astronomical Distance Determination in the Space Age. Secondary distance indicators
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• Lunar Outgassing, Transient Phenomena and The Return to The Moon, II: Predictions for Interactions between Outgassing and Regolith
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• Estimating dust distances to Type Ia supernovae from colour excess time-evolution
• Light Echoes of Transients and Variables in the Local Universe
• Asymmetries in SN 2014J Near Maximum Light Revealed Through Spectropolarimetry
• Type Ia Supernovae and their Environment: Theory and Applications to SN 2014J
• Continuum Foreground Polarization and Na~I Absorption in Type Ia SNe
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• Observation of light echoes around very young stars
• Detection of a Light Echo from the Otherwise Normal SN 2007af
• A Snapshot Survey of Nearby Supernovae with the Hubble Space Telescope
• The Effects of Circumstellar Dust Scattering on the Light Curves and Polarizations of Type Ia Supernovae
• On the Time Variation of Dust Extinction and Gas Absorption for Type~Ia Supernovae Observed Through Non-uniform Interstellar Medium
• Light Echoes of Historic Transients