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Shockingly Bright Warm Carbon Monoxide Molecular Features in the Supernova Remnant Cassiopeia A Revealed by JWST
J. Rho, S. -H. Park, R. Arendt +36
We present JWST NIRCam (F356W and F444W filters) and MIRI (F770W) images and NIRSpec- IFU spectroscopy of the young supernova remnant Cassiopeia A (Cas A). We obtained the data as…
Recovering lost light: discovery of supernova remnants with integral field spectroscopy
Héctor Martínez-Rodríguez, Lluís Galbany, Carles Badenes +8
We present results from a systematic search for broad ( 400 \kms) \ha\ emission in Integral Field Spectroscopy data cubes of 1200 nearby galaxies obtained with PMAS and…
The dust mass in Cassiopeia A from infrared and optical line flux differences
Maria Niculescu-Duvaz, Michael J. Barlow, Antonia Bevan +2
The large quantities of dust that have been found in a number of high redshift galaxies have led to suggestions that core-collapse supernovae (CCSNe) are the main sources of their…
The Palomar Transient Factory Core-Collapse Supernova Host-Galaxy Sample. I. Host-Galaxy Distribution Functions and Environment-Dependence of CCSNe
Steve Schulze, Ofer Yaron, Jesper Sollerman +51
Several thousand core-collapse supernovae (CCSNe) of different flavors have been discovered so far. However, identifying their progenitors has remained an outstanding open question…
Astro2020 Science White Paper: Are Supernovae the Dust Producer in the Early Universe?
Jeonghee Rho, Danny Milisavljevic, Arkaprabha Sarangi +23
Whether supernovae are a significant source of dust has been a long-standing debate. The large quantities of dust observed in high-redshift galaxies raise a fundamental question as…
The Temperature and Ionization of Unshocked Ejecta in Cas A
J. C. Raymond, B. -C. Koo, Y. -H. Lee +3
The supernova remnant Cassiopeia A (Cas A) is one of the few remnants in which it is possible to observe unshocked ejecta. A deep 1.64 micron image of Cas A shows a patch of diffus…
MMT Spectroscopy of Supernova Remnant Candidates in M33
Knox S. Long, William P. Blair, Dan Milisavljevic +2
To date, over 220 emission nebulae in M33 have been identified as supernova remnants (SNRs) or SNR candidates, principally through [SII]:Halpha line ratios that are elevated compar…
TRES Survey of Variable Diffuse Interstellar Bands
Charles J. Law, Dan Milisavljevic, Kyle N. Crabtree +8
Diffuse interstellar bands (DIBs) are absorption features commonly observed in optical/near-infrared spectra of stars and thought to be associated with polyatomic molecules that co…
Optical Discovery of an Apparent Galactic Supernova Remnant G159.6+7.3
Robert Fesen, Dan Milisavljevic
Deep Halpha images of portions of a faint 3 x 4 degree Halpha shell centered at l = 159.6 deg, b = 7.3 deg seen on the Virginia Tech Spectral Line Survey images revealed the presen…