67 citations · 261 across the 11 of their papers we have counts for
11 papers
Detection of Extensive Optical Emission from the Extremely Radio Faint Galactic Supernova Remnant G182.4+4.3
Robert Fesen, Jack Neustadt, Thomas How +1
Wide-field Halpha images of the radio faint Galactic supernova remnant G182.4+4.2 reveal a surprisingly extensive and complex emission structure, with an unusual series of broad an…
Narrow Transient Absorptions in Late-Time Optical Spectra of Type Ia Supernovae: Evidence for Large Clumps of Iron-Rich Ejecta?
Christine S. Black, Robert A. Fesen, Jerod T. Parrent
An examination of late-time, optical spectra of type Ia supernovae revealed surprisingly narrow absorption features which only become visible a few months after maximum light. Thes…
Optical Emission Associated with the Galactic Supernova Remnant G179.0+2.6
Thomas How, Robert Fesen, Jack Neustadt +2
Narrow passband optical images of the large Galactic supernova remnant G179.0+2.6 reveal a faint but nearly complete emission shell dominated by strong [O III] 4959,5007 A line emi…
A Distance Estimate to the Cygnus Loop Based on the Distances to Two Stars Located Within the Remnant
Robert A. Fesen, Jack M. M. Neustadt, Christine S. Black +1
Underlying nearly every quantitative discussion of the Cygnus Loop supernova remnant is uncertainty about its distance. Here we present optical images and spectra of nebulosities a…
The Transition of a Type IIL Supernova into a Supernova Remnant: Late-time Observations of SN 2013by
C. S. Black, D. Milisavljevic, R. Margutti +3
We present early-time Swift and Chandra X-ray data along with late-time optical and near-infrared observations of SN 2013by, a Type IIL supernova (SN) that occurred in the nearby s…
Another look at the size of the low-surface brightness galaxy VCC 1661 in the Virgo Cluster
Andreas Koch, Christine S. Black, R. Michael Rich +3
We present new wide-field images of the low-surface brightness Virgo Cluster dwarf galaxy VCC 1661. The extant literature lists a broad range of radii for this object, covering a f…
The Intrinsic Eddington Ratio Distribution of Active Galactic Nuclei in Star-forming Galaxies from the Sloan Digital Sky Survey
M. L. Jones, R. C. Hickox, C. S. Black +3
An important question in extragalactic astronomy concerns the distribution of black hole accretion rates of active galactic nuclei (AGN). Based on observations at X-ray wavelengths…
Progressive Red Shifts in the Late-Time Spectra of Type Ia Supernovae
C. S. Black, R. A. Fesen, J. T. Parrent
We examine the evolution of late-time, optical nebular features of Type Ia supernovae (SNe Ia) using a sample consisting of 160 spectra of 27 normal SNe Ia taken from the literatur…
Discovery of an Apparent High Latitude Galactic Supernova Remnant
Robert Fesen, Jack Neustadt, Christine Black +1
Deep H images of a faint emission complex 4.0 x 5.5 degrees in angular extent and located far off the Galactic plane at l = 70.0 degrees, b=-21.5 degrees reveal numerous thin fi…
A 3D Kinematic Study of the Northern Ejecta "Jet" of the Crab Nebula
Christine S. Black, Robert A. Fesen
We present [O III] 4959,5007 emission line spectra (FWHM = 40 km/s) of the Crab Nebula's northern ejecta `jet'. These data, along with a recent [O III] image of the Crab, are used…
Threshing in Action - The tidal disruption of a dwarf galaxy by the Hydra I Cluster
Andreas Koch, Andreas Burkert, R. Michael Rich +4
We report on the discovery of strong tidal features around a dwarf spheroidal galaxy in the Hydra I galaxy cluster, indicating its ongoing tidal disruption. This very low surface b…