Christopher L. Gerardy

Signatures of delayed detonation, asymmetry, and electron capture in the mid-infrared spectra of supernovae 2003hv and 2005df (2007)

Gerardy, Christopher L., Meikle, W. P. S., Kotak, Rubina, Höflich, Peter, Farrah, Duncan, Filippenko, Alexei V., ...

We present mid-infrared (5.2-15.2 μm) spectra of the Type Ia supernovae (SNe Ia) 2003hv and 2005df observed with the Spitzer Space Telescope. These are the first observed mid-infrared spectra of...

Signatures of Delayed Detonation, Asymmetry, and Electron Capture in the Mid-Infrared Spectra of Supernovae 2003hv and 2005df (2007)

Gerardy, Christopher L., Meikle, W. P. S., Kotak, Rubina, Hoeflich, Peter, Farrah, Duncan, Filippenko, Alexei V., ...

We present the first mid-infrared (5.2-15.2 micron) spectra of Type Ia supernovae (SNe 2003hv and 2005df). The detection of Ni emission in SN 2005df 135 days after the explosion provides direct...

The Chemical Distribution in a Subluminous Type Ia Supernova: HST Images of the SN 1885 Remnant (2006)

Fesen, Robert A., Hoeflich, Peter A., Hamilton, Andrew J. S., Hammell, Molly C., Gerardy, Christopher L., Khokhlov, Alexei M., ...

We present HST images of the remnant of SN 1885 seen in absorption against M31's bulge via resonance lines of Ca I, Ca II, Fe I, and Fe II. Viewed in CaII H & K line absorption, the remnant appears...

Spitzer measurements of atomic and molecular abundances in the Type IIP SN 2005af (2006)

Kotak, Rubina, Meikle, Peter, Pozzo, Monica, Van Dyk, Schuyler D., Farrah, Duncan, Fesen, Robert, ...

We present results based on Spitzer Space Telescope mid-infrared (3.6-30 micron) observations of the nearby IIP supernova 2005af. We report the first ever detection of the SiO molecule in a Type IIP...

Discovery of Extensive Optical Emission Associated with the X-ray Bright, Radio Faint Galactic SNR G156.2+5.7 (2006)

Gerardy, Christopher L., Fesen, Robert A.

We present wide-field Halpha images of the Galactic supernova remnant G156.2+5.7 which reveal the presence of considerable faint Halpha line emission coincident with the remnant's X-ray emission. The...

The asymmetric explosion of type Ia supernovae as seen from near-infrared observations (2006)

Motohara, Kentaro, Maeda, Keiichi, Gerardy, Christopher L., Nomoto, Ken'ichi, Tanaka, Masaomi, Tominaga, Nozomu, ...

SN 2005cg: Explosion Physics and Circumstellar Interaction of a Normal Type Ia Supernova in a Low-Luminosity Host (2005)

Quimby, Robert, Hoeflich, Peter, Kannappan, Sheila J., Rykoff, Eli, Rujopakarn, Wiphu, Akerlof, Carl W., ...

We present the spectral evolution, light curve, and corresponding interpretation for the "normal-bright" Type Ia Supernova 2005cg discovered by ROTSE-IIIc. The host is a low-luminosity (M_r =...

Signature of Electron Capture in Iron-Rich Ejecta of SN 2003du (2004)

Hoeflich, Peter, Gerardy, Christopher L., Nomoto, Kenichi, Motohara, Kentaro, Fesen, Robert A., Maeda, Keiichi, ...

Late-time near-infrared and optical spectra are presented for the normal-bright SN2003du. At about 300 days after the explosion, the emission profiles of well isolated [FeII] lines (in particular...

Carbon Monoxide in the Type Ic SN 2000ew (2002)

Gerardy, Christopher L., Fesen, Robert A., Nomoto, Ken'ichi, Maeda, Keiichi, Hoeflich, Peter, Wheeler, J. Craig

We present K-band (1.9 -- 2.5 micron) spectra of the Type Ic SN 2000ew observed with IRCS on the Subaru Telescope. These data show the first detection of carbon monoxide (CO) emission in a Type Ic...

Near-infrared spectroscopy of supernovae / (2002)

Gerardy, Christopher L.

"September 30, 2002"

Hubble Space Telescope WFPC-2 Imaging of Cassiopeia A (2001)

Fesen, Robert A., Morse, Jon A., Chevalier, Roger A., Borkowski, Kazimierz J., Gerardy, Christopher L., Lawrence, Stephen S., ...

The young SNR Cassiopeia A was imaged with WFPC-2 through four filters selected to capture the complete velocity range of the remnant's main shell in several important emission lines. Primary lines...

Detection of CO and Dust Emission in Near-Infrared Spectra of SN 1998S (1999)

Gerardy, Christopher L., Fesen, Robert A., Hoeflich, Peter, Wheeler, J. Craig

Near-infrared spectra (0.95 -- 2.4 micron) of the peculiar Type IIn supernova 1998S in NGC 3877 from 95 to 355 days after maximum light are presented. K-band data taken at days 95 and 225 show the...

Late-Time Optical and UV Spectra of SN 1979C and SN 1980K (1998)

Fesen, Robert A., Gerardy, Christopher L., Filippenko, Alexei V., Matheson, Thomas, Chevalier, Roger A., Kirshner, Robert P., ...

A low-dispersion Keck I spectrum of SN 1980K taken in August 1995 (t = 14.8 yr after explosion) and a November 1997 MDM spectrum (t = 17.0 yr) show broad 5500 km s^{-1} emission lines of H\alpha, [O...

HST Images and Spectra of the Remnant of SN 1885 in M31 (1998)

Fesen, Robert A., Gerardy, Christopher L., McLin, Kevin M., Hamilton, Andrew J. S.

Near UV HST images of the remnant of SN 1885 (S And) in M31 show a 0"70 +- 0"05 diameter absorption disk silhouetted against M31's central bulge, at SN 1885's historically reported position. The...