Howie's ADS listings
Recent Publications for G. H. "Howie" Marion

CBET 2163 - SN 2010U
CBET 2126 - SN 2010G
The Transitional Stripped-Envelope SN 2008ax: Spectral Evolution and Evidence for Large Asphericity
Authors:Chornock, R., Filippenko, A. V., Li, W., Marion, G. H., Foley, R. J, and 17 co-authors
Submitted to ApJ (arXiv:1001.2775)
2008ax was a rare opportunity to study a core-collapse SN beginning with the initial envelope-cooling phase immediately following shock breakout. We present an extensive sequence of optical and near-infrared spectra, as well as three epochs of optical spectropolarimetry. Our initial spectra, taken two days after shock breakout, are dominated by hydrogen Balmer lines at high velocity. However, by maximum light, He I lines dominated the optical and near-infrared spectra, which closely resembled those of normal Type Ib supernovae. We demonstrate that asphericities extended from the outermost layers all the way down to the center of this SN.
CBET 2110 - SN 2009nq
CBET 1901 - SN 2009ia
A Catalog of Near-Infrared Spectra from Type Ia Supernovae
Authors: Marion, G. H., Hoeflich, P., Gerardy, C. L., Vacca, W. D., Wheeler, J. C., and Robinson, E. L.
2009, AJ 138, 727
We present 41 near-infrared spectra from Type Ia supernovae. We identify major spectral features and discuss the implications for the physics of the explosion. The large sample size permits us to show that NIR spectral development is uniform for SNe Ia. We show that nearly the entire progenitor must be burned in the explosion and that the chemical structure of burning products are distributed in radial layers.
IOP site for this paper

The fast declining Type Ia supernova 2003gs and an apparent bimodal distribution of near-infrared absolute magnitudes at maximum light
Authors: Kevin Krisciunas, Howie Marion, Nicholas B. Suntzeff, Guillaume Blanc, Filomena Bufano, Pablo Candia, Regis Cartier, Nancy Elias-Rosa, Juan Espinoza, David Gonzalez, Samuel D. Gooding, Mario Hamuy, Ethan A. Knox, Peter A. Milne, Nidia Morrell
SN 2003gs was the first fast declining Type Ia SN that has been well observed since SN 1999by. While it was subluminous in optical bands compared to more slowly declining Type Ia SNe, it was not subluminous at maximum light in the near-IR bands. There appears to be a bimodal distribution in the near-IR absolute magnitudes of Type Ia SNe at maximum light. Near-IR spectral evidence suggests that opacities in the outer layers of SN 2003gs are reduced much earlier than for normal Type Ia SNe. That may allow gamma rays that power the luminosity to escape more rapidly and accelerate the decline rate.

Type Ia supernova science 2010-2020
Authors: D. A. Howell, A. Conley, M. Della Valle, P. E. Nugent, S. Perlmutter, G. H. Marion, K. Krisciunas, and others
arXiv:0903.1086
White paper submitted to the Astro2010 committee

Type II supernova as Probes of Cosmology
Authors: Dovi Poznanski, Eddie Baron, Stephane Blondin, Daniel N. Kasen, Kevin L. Krisciunas, Douglas C. Leonard, Weidong Li, Mario Livio, Howie Marion, D. A. Howell, and others
arXiv:0902.3142
Science white paper, submitted to the Decadal committee Astro2010

CBET 1837 (2009)
Authors: Vinko, J., Yuan, F., Marion, H., Quimby, R., Chamarro, D., Sisson, M. D., Akerlof, C., Wheeler, J. C., Chatzopoulos, E.
We use HET spectra to identify SNe 2009fx and 2009fy as 91T-like Type Ia supernova.

CBET 1776 (2009)
Authors: Marion, H., Garnavich, P., Challis, P., Calkins, M., Peters, W.
We use optical and NIR spectra to identify SN 2009dc as an unusual Type Ia supernova.

CBET 1710 (2009)
Authors: Vinko, J., Marion, H., Wheeler, J. C., Garnavich, P., Gerardy, C., Caldwell, J.
We use HET spectra to identify SN 2009am as a Type II-P supernova and SN 2009an as a Type Ia supernova.

CBET 1657 (2009)
Authors: Marion, H., Garnavich, P., Gerardy, C. L., Gooding, S., Vinko, J., Hsiao, E.
We use a NIR spectrum obtained by Marion to identify SN 2009F as a Type Ia supernova.

From Shock Breakout to Peak and Beyond; Extensive Panchromatic Observations of the Aspherical Type Ib Supernova 2008D associated with Swift X-ray Transient 080109
Authors: Modjaz, M., Marion, G. H., et al.
2009, ApJ accepted (astro-ph/arXiv:0805.2201)
We present extensive early photometric and spectroscopic (optical and near-infrared) data on supernova (SN) 2008D as well as X-ray data on the associated X-ray transient (XRT) 080109. The NIR spectra of Marion, et al. are shown to be critical diagnostics for Type Ib/c supernovae.

Signatures of Isotopes in Thermonuclear Supernovae
Authors: Hoeflich, P., Gerardy, C. L., Quimby, R. and Marion, H.
2006, NewAR, 50, 470
We study the observational signatures of thermonuclear burning fronts in SNe Ia and discuss evidence for off-center DDT transitions. New observations suggest that our current picture of deflagration fronts is incomplete.

CBET 1305 (2008)
Authors: Marion, H., Garnavich, P., Gerardy, C. L., Rudy, R. J., Lynch, D. K., Russell, R. W., Woodward, C. E.
We use a NIR spectrum obtained by Marion to identify SN 2008ax as a Type Ib supernova. This object had previously been classified as a Type IIb.

GCNC 7188 (2008)
Authors: Marion, H., Garnavich, P., and Gerardy, C.
A very early NIR spectrum of SN 2008D which has been associated with a gamma-ray burst. We describe features near 1.01 and 0.80 microns that are similar to previous observations of SNe Ib/c.

CBET 1176 (2007)
Authors: Garnavich, P., Marion, H., Challis, P., Blondin, S., and Kirshner, R.
Observation of the host galaxy of SN 2007qe that significantly increases the measured redshift and changes the velocity of the unusual CaII feature.

CBET 1145 (2007)
Authors: Marion, H. and Garnavich, P.
Identification of SN 2007qe as a peculiar Type-Ia supernova before maximum light and comment on the unusual CaII feature.

Low Carbon Abundance in Type Ia Supernovae
Authors: Marion, G. H., Hoeflich, P., Wheeler, J. C., Robinson, E. L., Gerardy, C. L., and Vacca, W. D.
2006, ApJ 635, 1392 (astro-ph/0601614)

X-treme Stars You Can See
Authors: C. Renee James and Howie Marion
April 2006, Astronomy Magazine, Vol. 34, No.4

Asymmetric Supernovae: New Physics and Implications for Nucleosynthesis
Authors: Wheeler, J. C., Hoeflich, P., Gerardy, C., Akiyama, S. and Marion, G. H.
2005, ASPC, 336, 247

IAUC 8371 (2004)
Authors: Gerardy, C. L., Marion, G. H., Shetrone, M., and Deglman, F.
Identification of Supernova 2004da in NGC 6901 as a Ia (pec.) soon after max

IAUC 8337 (2004)
Authors: Marion, G. H., Gerardy, C. L., Odewahn, S., and Graver, M.
Identification of Supernova 2004bl in MCG +00-31-42 as a Ia near max

SN 2003du: Signatures of the Circumstellar Environment in a Normal Type Ia Supernova?
Authors: Gerardy, C. L., Hoeflich, P., Quimby, R., Wang, L., Wheeler, J. C., Fesen, R. A., Marion, G. H., Nomoto, K. and Schaefer, B. E.
2004, ApJ, 607, 391 (astro-ph/0309639)

IAUC 8275 (2004)
Authors: Gerardy, C. L. and Marion, G. H.
Identification of SN 2004I as a Type II supernova.

IAUC 8273 (2004)
Authors: Gerardy, C. L. and Marion, G. H.
Identification of SN 2004H as Type Ia supernova with a strong silicon feature at 580nm indicating a subluminous SN Ia.

Near-infrared spectroscopy of stripped-envelope supernovae
Authors: Gerardy, C. L., Fesen, R. A., Marion, G. H., Hoeflich, P., Wheeler, J. C., Nomoto, K. and Motohara, K.
2004, cetd.conf., 57

Near Infrared Spectra of Type Ia Supernovae
Authors: Marion, G. H., P. Hoeflich, W. D. Vacca and J. C. Wheeler
2003, ApJ , 591, 316 (astro-ph/0306470)

Physics of SNe Ia and Cosmology
Authors: Hoeflich, P., Gerardy, C., Khokhlov, A., Linder, E., and Marion, G. H.
2003, in ``Stellar Candles for the Extragalactic Distance Scale'', eds. Gieren et al., Lecture Notes in Physics (astro-ph/0301334)

IAUC 7860 (2002)
Authors: Marion, G. H., Hoeflich, P., Vacca, W. D. and Wheeler, J. C.
Identification of several features in the near infrared spectrum of hypernova SN 2002ap.

IAUC 7732 (2001)
Authors: Marion, G. H., Hoeflich, P., Vacca, W. D. and Wheeler, J. C.
Announcement of first identification of supernova type using infrared spectra. SN2001en is a type Ia, near maximum light.

Constraints on Type Ia Supernovae from Near Infrared Spectra,
Authors: Marion, G. H., Hoeflich, P., and Wheeler, J. C.
2001, RMxAC, 10, 190, in proc. of "The Seventh Texas-Mexico Conference on Astrophysics: Flows, Blows, and Glows," eds. W. Lee and S. Torres-Peimbert, RevMexAA (Serie de Conferencias) (astro-ph 0006414)

Evidence Against an Association Between Gamma-Ray Bursts and Type I Supernovae - A condensed version of the paper below
Authors: C. Graziani, D.Q. Lamb, and G.H. Marion
1999, A&AS, 138, 469, in proc. of "Gamma-Ray Bursts in the Afterglow Era", Nov. 1998, Rome, F. Frontera & L. Piro eds., A&A Suppl. Ser. (astro-ph 9909025)

Evidence Against an Association Between Gamma-Ray Bursts and Type I Supernovae,
Authors: C. Graziani, D.Q. Lamb, and G.H. Marion
1998, submitted to ApJ but never published (astro-ph 9810374)

Prototype Test Results of the Solar Tower Atmospheric Cherenkov Effect Experiment (STACEE),
Authors: The STACEE Collaboration (inlcudes G.H.Marion)
1998, Nuclear Instruments & Methods, A408, 468-485 (astro-ph 9704037)
Howie helped design and fabricate the secondary optics for this High Energy Gamma-ray detector.

Low Mass Density Wide Field Far-IR/Submillimeter Telescope Systems,
Author: Mark Dragovan, submitted to ApJ Letters, includes details of work Howie did with membrane mirror structures (astro-ph/0001241)

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