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An Excess of Mid-Infrared Emission from the Type Iax SN 2014dt
Ori D. Fox, Joel Johansson, Mansi Kasliwal +12
Supernovae Type Iax (SNe Iax) are less energetic and less luminous than typical thermonuclear explosions. A suggested explanation for the observed characteristics of this subclass…
The Persistent Eruption of UGC~2773-OT: Finally, a Decade-Long Extragalactic Eta Carinae Analog
Nathan Smith, Jennifer E. Andrews, Jon C. Mauerhan +4
While SN impostors resemble the Great Eruption of eta Car in the sense that their spectra show narrow H lines and they have typical peak absolute magnitudes of -13 to -14 mag, most…
What Powers the 3000-Day Light Curve of SN 2006gy?
Ori D. Fox, Nathan Smith, S. Mark Ammons +11
SN 2006gy was the most luminous SN ever observed at the time of its discovery and the first of the newly defined class of superluminous supernovae (SLSNe). The extraordinary energe…
Early Dust Formation and a Massive Progenitor for SN 2011ja?
J. E. Andrews, Kelsie M. Krafton, Geoffrey C. Clayton +6
SN 2011ja was a bright (I = -18.3) Type II supernova occurring in the nearby edge on spiral galaxy NGC 4945. Flat-topped and multi-peaked H-alpha and H-beta spectral emission lines…
Late-time spectroscopy of SN 2002hh: A continued visible light echo with no shock interaction yet
Jennifer E. Andrews, Nathan Smith, Jon C. Mauerhan
Supernova (SN) 2002hh was unusual among core-collapse SNe because it was highly reddened, and displayed a bright infrared (IR) excess due to radiatively heated dust in its circumst…
LEGUS Discovery of a Light Echo Around Supernova 2012aw
Schuyler D. Van Dyk, Janice C. Lee, Jay Anderson +9
We have discovered a luminous light echo around the normal Type II-Plateau Supernova (SN) 2012aw in Messier 95 (M95; NGC 3351), detected in images obtained approximately two years…
PTF11iqb: Cool supergiant mass loss that bridges the gap between Type IIn and normal supernovae
Nathan Smith, Jon C. Mauerhan, S. Bradley Cenko +16
PTF11iqb was initially classified as a TypeIIn event caught very early after explosion. It showed narrow Wolf-Rayet (WR) spectral features on day 2, but the narrow emission weakene…