135 citations · 636 across the 19 of their papers we have counts for
19 papers
Line Identification and Excitation of Autoionizing States in a Late-Type, Low Mass Wolf-Rayet Star
Robert Williams, Catherine Manea, Bruce Margon +1
Identifications of a large fraction of previously unidentified lines in the complex spectrum of the low mass, late-type LMC [WC11] star J060819.93-715737.4 have been made utilizing…
Hubble Telescope 30 Years in Orbit: Personal Reflections
Robert Williams
With an initial requirement to make observations a minimum of 5-10 years, Hubble Space Telescope (HST) has continued to operate well for 30 years. It has relied upon five servicing…
The Long-Term Secular Mass Accretion Rate of the Recurrent Nova T Pyxidis
Patrick Godon, Edward Sion, Robert Williams +1
We present Hubble Space Telescope ultraviolet spectroscopy of the recurrent nova T Pyxidis obtained more than 5 years after its 2011 outburst indicating that the system might not h…
Third Parameter Classification of Transients and Novae Ejecta as Ballistically Ejected Globules
Robert Williams
A third parameter, in addition to luminosity and rate of brightness decline, derived from the spectra of transients is suggested as a means of more accurately classifying objects i…
A Systematic Study of Mid-Infrared Emission from Core-Collapse Supernovae with SPIRITS
Samaporn Tinyanont, Mansi M. Kasliwal, Ori D. Fox +12
We present a systematic study of mid-infrared (mid-IR) emission from 141 nearby supernovae (SNe) observed with the InfraRed Array Camera (IRAC) on Spitzer.These SNe reside in one o…
Early optical spectra of nova V1369 Cen show presence of Lithium
L. Izzo, M. Della Valle, E. Mason +10
We present early high resolution spectroscopic observations of the nova V1369 Cen. We have detected an absorption feature at 6695.6 Å\, that we have identified as blue--shifted $^7…