Profile: Andy Howell

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My Publications

27 Jun 2012 Evolution in the Volumetric Type Ia Supernova Rate from the Supernova Legacy Survey
27 Jun 2012 A Compact Degenerate Primary-star Progenitor of SN 2011fe
Bloom et al. 2012, ApJL, 744, L17
27 Jun 2012 Exclusion of a luminous red giant as a companion star to the progenitor of supernova SN 2011fe
Li et al. 2011, Nature, 480, 348
20 Dec 2011 Supernova SN 2011fe from an exploding carbon–oxygen white dwarf star
Nature, 480, 344-347 (2011)
17 Oct 2011 The Rise-Time of Normal and Subluminous Type Ia Supernovae
arXiv:1109.5757, apj accepted
08 Aug 2011 PTF 10bzf (SN 2010ah): a broad-line Ic supernova discovered by the Palomar Transient Factory
Corsi et al. 2011, ApJ, accepted
03 Aug 2011 PTF10ops - a subluminous, normal-width lightcurve Type Ia supernova in the middle of nowhere
Maguire et al. 2011, MNRAS, accepted
26 Jul 2011 Constraining Type Ia Supernovae progenitors from three years of SNLS data
Astrophysical Journal -- accepted v738
09 Jun 2011 Hydrogen-poor superluminous stellar explosions
Quimby et al. 2011, Nature
11 Apr 2011 SNLS3: Constraints on Dark Energy Combining the Supernova Legacy Survey Three Year Data with Other Probes
Sullivan et al. 2011, ApJ, submitted
11 Apr 2011 Supernova Constraints and Systematic Uncertainties from the First Three Years of the Supernova Legacy Survey
Conley et al. 2011 ApJS, 192, 1
11 Apr 2011 The Subluminous and Peculiar Type Ia Supernova PTF09dav
Sullivan et al. 2011, ApJ, accepted
17 Mar 2011 PTF10iya: A short-lived, luminous flare from the nuclear region of a star-forming galaxy
Cenko et al. 2011, MNRAS, submitted
24 Jan 2011 Supernova Science at LCOGT
Poster presented at AAS meeting, January 2011
24 Nov 2010 The Extreme Hosts of Extreme Supernovae
Neill, J. D. et al. 2010, ApJ, accepted
24 Nov 2010 Subluminous Type Ia Supernovae at High Redshift from the Supernova Legacy Survey
Gonzalez-Gaitan et al. 2010, ApJ, accepted
16 Nov 2010 Type Ia Supernovae as Stellar Endpoints and Cosmological Tools
Howell, D. A., 2011, Nature Communications, 2, 350
16 Nov 2010 Galaxy Zoo Supernovae
Smith et al. 2010, MNRAS, accepted
01 Nov 2010 The Supernova Legacy Survey 3-year sample: Type Ia Supernovae photometric distances and cosmological constraints
Guy et al. 2010, A&A, accepted
01 Nov 2010 Hubble Space Telescope Studies of Nearby Type Ia Supernovae: The Mean Maximum Light Ultraviolet Spectrum and its Dispersion
Cooke et al. 2010, ApJL, submitted
01 Nov 2010 Supernova PTF 09uj: A possible shock breakout from a dense circumstellar wind
Ofek et al. 2010, ApJ, accepted
01 Nov 2010 Rapidly Decaying Supernova 2010X: A Candidate ".Ia" Explosion
Kasliwal et al. 2010, ApJL, 723, 98
02 Sep 2010 Core-Collapse Supernovae from the Palomar Transient Factory: Indications for a Different Population in Dwarf Galaxies
Arcavi et al 2010 ApJ 721 777
20 Aug 2010 Ultra-bright optical transients are linked with type Ic supernovae
Pastorello et al. 2010, ApJL, 724, 16
20 Aug 2010 Supernova Legacy Survey: Using Spectral Signatures To Improve Type Ia Supernovae As Distance Indicators
Walker et al. 2010, MNRAS, accepted
15 Jun 2010 Real-time Analysis and Selection Biases in the Supernova Legacy Survey
Perrett et al. 2010, AJ, accepted
02 Jun 2010 Spectra and Hubble Space Telescope Light Curves of Six Type Ia Supernovae at 0.511 < z < 1.12 and the Union2 Compilation
Amanullah, R. et al. 2010, ApJ, 716, 712
13 Apr 2010 Spectra and Light Curves of Six Type Ia Supernovae at 0.511 < z < 1.12 and the Union2 Compilation
Amanullah et al. 2010, ApJ, accepted
30 Mar 2010 The Dependence of Type Ia Supernova Luminosities on their Host Galaxies
Sullivan, M. 2010, MNRAS, accepted
09 Feb 2010 Constraining dark matter halo properties using lensed SNLS supernovae
Jonsson, J. et al. 2010, MNRAS, accepted, astro-ph/1002.1374
09 Feb 2010 Gravitational lensing in the Supernova Legacy Survey (SNLS)
Kronborg, T. et al., 2010, A&A, accepted, astro-ph/1002.1249
16 Dec 2009 The Type Ia Supernova Rate in Radio and Infrared Galaxies from the CFHT Supernova Legacy Survey
Graham et al. 2010, AJ, accepted
13 Nov 2009 The Local Hosts of Type Ia Supernovae
Neill et al. 2009, ApJ, in press
13 Nov 2009 Subaru FOCAS Spectroscopic Observations of High-Redshift Supernovae
Morokuma et al.  2009, PASJ, in press
13 Nov 2009 Photometric redshifts for supernovae Ia in the Supernova Legacy Survey
Palanque-Delabrouille et al. 2009, A&A, submitted
02 Oct 2009 Mysterious transients unmasked as the bright blue death throes of massive stars
Quimby et al. 2009, Submitted to Nature
02 Oct 2009 The ESO/VLT 3rd year Type Ia supernova data set from the Supernova Legacy Survey
Balland et al. 2009, A&A, 507, 85
28 Aug 2009 Photometric Calibration of the Supernova Legacy Survey Fields
Regnault et al., Astronomy & Astrophysics, accepted, arXiv:0908.3808
28 Jul 2009 The Carnegie Supernova Project: First Near-Infrared Hubble Diagram to z~0.7
Freedman et al. 2009, ApJ, accepted
03 Jul 2009 The Palomar Transient Factory: System Overview, Performance and First Results
Law et al., PASP, accepted
03 Jul 2009 Exploring the Optical Transient Sky with the Palomar Transient Factory
Rau et al. PASP, accepted
24 Jun 2009 Constraining dust and color variations of high-z SNe using NICMOS on Hubble Space Telescope
Nobili et al. 2009, ApJ, 700, 1415
30 Apr 2009 The Core-collapse Rate from the Supernova Legacy Survey
Bazin et al. 2009, A&A, accepted, astro-ph: 0904.1066
30 Apr 2009 Type Ia supernova science 2010-2020
arXiv:0903.1086
22 Jan 2009 The Mean Type Ia Supernova Spectrum Over the Past 9 Gigayears
Sullivan, M., Ellis, R. S., Howell, D. A., Riess, A., Nugent, P. E., & Gal-Yam, A. 2009, ApJL, accepted, astro-ph/0901.2476
22 Jan 2009 The Effect of Progenitor Age and Metallicity on Luminosity and [sup]56[/sup]Ni Yield in Type Ia Supernovae
Howell, D. A. et al. 2009, ApJ, 691, 661
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Staff Scientist
http://dahowell.googlepages.com