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Rise and fall of the dust shell of the classical nova V339 Delphini
A. Evans, D. P. K. Banerjee, R. D. Gehrz +16
We present infrared spectroscopy of the classical nova V339 Delphini, obtained over a year period. The infrared emission lines were initially symmetrical, with HWHM velocit…
Type Ia Supernovae: Colors, Rates, and Progenitors
Epson Heringer, Chris Pritchet, Jason Kezwer +3
The rate of type Ia supernovae (SNe Ia) in a galaxy depends not only on stellar mass, but also on star formation history. Here we show that two simple observational quantities ($g-…
Constraints on the Progenitor of SN 2016gkg From Its Shock-Cooling Light Curve
Iair Arcavi, Griffin Hosseinzadeh, Peter J. Brown +17
SN 2016gkg is a nearby Type IIb supernova discovered shortly after explosion. Like several other Type IIb events with early-time data, SN 2016gkg displays a double-peaked light cur…
The progenitor and early evolution of the Type IIb SN 2016gkg
L. Tartaglia, M. Fraser, D. J. Sand +24
We report initial observations and analysis on the Type IIb SN~2016gkg in the nearby galaxy NGC~613. SN~2016gkg exhibited a clear double-peaked light curve during its early evoluti…
Spectroscopic confirmation of the dwarf spheroidal galaxy d0944+71 as a member of the M81 group of galaxies
Elisa Toloba, David Sand, Puragra Guhathakurta +3
We use Keck/DEIMOS spectroscopy to measure the first velocity and metallicity of a dwarf spheroidal (dSph) galaxy beyond the Local Group using resolved stars. Our target, d0944+71,…
Maximizing Science in the Era of LSST: A Community-Based Study of Needed US Capabilities
Joan Najita, Beth Willman, Douglas P. Finkbeiner +48
The Large Synoptic Survey Telescope (LSST) will be a discovery machine for the astronomy and physics communities, revealing astrophysical phenomena from the Solar System to the out…