D. A. Howell

Research interests

Publications

• An outflow powers the optical rise of the nearby, fast-evolving tidal disruption event AT2019qiz

  Monthly Notices of the Royal Astronomical Society · 2020 · 10.1093/mnras/staa2824

• Investigating the properties of stripped-envelope supernovae; what are the implications for their progenitors?

  Monthly Notices of the Royal Astronomical Society · 2018 · 10.1093/mnras/sty3399

• Extreme magnification of an individual star at redshift 1.5 by a galaxy-cluster lens

  Nature Astronomy · 2018 · 10.1038/s41550-018-0430-3

• Light Curves of Hydrogen-poor Superluminous Supernovae from the Palomar Transient Factory

  The Astrophysical Journal · 2018 · 10.3847/1538-4357/aab9b6

• Optical emission from a kilonova following a gravitational-wave-detected neutron-star merger

  Nature · 2017 · 10.1038/nature24291

• Energetic eruptions leading to a peculiar hydrogen-rich explosion of a massive star

  Nature · 2017 · 10.1038/nature24030

• On the nature of hydrogen-rich superluminous supernovae

  Monthly Notices of the Royal Astronomical Society · 2017 · 10.1093/mnras/stx3179

• The rapid reddening and featureless optical spectra of the optical counterpart of GW170817, at 2017gfo, during the first four days

  Figshare · 2017 · 10.25916/sut.26245337.v1

• Confined dense circumstellar material surrounding a regular type II supernova

  Nature Physics · 2017 · https://doi.org/10.1038/nphys4025

• The diversity of Type II supernova versus the similarity in their progenitors

  Monthly Notices of the Royal Astronomical Society · 2016 · https://doi.org/10.1093/mnras/stw870

• SN 2015bn: A DETAILED MULTI-WAVELENGTH VIEW OF A NEARBY SUPERLUMINOUS SUPERNOVA

  Apollo (University of Cambridge) · 2016 · 10.17863/cam.738

• FLASH SPECTROSCOPY: EMISSION LINES FROM THE IONIZED CIRCUMSTELLAR MATERIAL AROUND <10-DAY-OLD TYPE II SUPERNOVAE

  The Astrophysical Journal · 2016 · 10.3847/0004-637x/818/1/3

• RAPIDLY RISING TRANSIENTS IN THE SUPERNOVA—SUPERLUMINOUS SUPERNOVA GAP

  The Astrophysical Journal · 2016 · 10.3847/0004-637x/819/1/35

• PTF12os and iPTF13bvn

  Astronomy and Astrophysics · 2016 · 10.1051/0004-6361/201628275

• SUPERLUMINOUS SUPERNOVA SN 2015bn IN THE NEBULAR PHASE: EVIDENCE FOR THE ENGINE-POWERED EXPLOSION OF A STRIPPED MASSIVE STAR

  The Astrophysical Journal Letters · 2016 · 10.3847/2041-8205/828/2/l18

• The superluminous transient ASASSN-15lh as a tidal disruption event from a Kerr black hole

  Nature Astronomy · 2016 · https://doi.org/10.1038/s41550-016-0002

• The rise-time of Type II supernovae

  Monthly Notices of the Royal Astronomical Society · 2015 · https://doi.org/10.1093/mnras/stv1097

• A strong ultraviolet pulse from a newborn type Ia supernova

  Nature · 2015 · 10.1038/nature14440

• Diversity in extinction laws of Type Ia supernovae measured between 0.2 and 2 μm

  Monthly Notices of the Royal Astronomical Society · 2015 · 10.1093/mnras/stv1505

• Improved cosmological constraints from a joint analysis of the SDSS-II and SNLS supernova samples

  Astronomy and Astrophysics · 2014 · https://doi.org/10.1051/0004-6361/201423413

• Superluminous supernovae from PESSTO

  Monthly Notices of the Royal Astronomical Society · 2014 · 10.1093/mnras/stu1579

• Exploring the spectral diversity of low-redshift Type Ia supernovae using the Palomar Transient Factory

  Monthly Notices of the Royal Astronomical Society · 2014 · 10.1093/mnras/stu1607

• The rising light curves of Type Ia supernovae

  Monthly Notices of the Royal Astronomical Society · 2014 · 10.1093/mnras/stu2314

• Hubble Space Telescope spectra of the Type Ia supernova SN 2011fe: a tail of low-density, high-velocity material with Z < Z⊙

  Monthly Notices of the Royal Astronomical Society · 2014 · 10.1093/mnras/stu077

• A CONTINUUM OF H- TO He-RICH TIDAL DISRUPTION CANDIDATES WITH A PREFERENCE FOR E+A GALAXIES

  The Astrophysical Journal · 2014 · https://doi.org/10.1088/0004-637x/793/1/38

• THE MAN BEHIND THE CURTAIN: X-RAYS DRIVE THE UV THROUGH NIR VARIABILITY IN THE 2013 ACTIVE GALACTIC NUCLEUS OUTBURST IN NGC 2617

  eScholarship (California Digital Library) · 2014

• Low luminosity Type II supernovae – II. Pointing towards moderate mass precursors

  Monthly Notices of the Royal Astronomical Society · 2014 · https://doi.org/10.1093/mnras/stu156

• THE RISE OF SN 2014J IN THE NEARBY GALAXY M82

  The Astrophysical Journal Letters · 2014 · 10.1088/2041-8205/784/1/l12

• The first month of evolution of the slow-rising Type IIP SN 2013ej in M74

  Monthly Notices of the Royal Astronomical Society Letters · 2013 · 10.1093/mnrasl/slt171

• Optical and near-infrared observations of SN 2011dh – The first 100 days

  Astronomy and Astrophysics · 2013 · https://doi.org/10.1051/0004-6361/201321850

• An outburst from a massive star 40 days before a supernova explosion

  Nature · 2013 · 10.1038/nature11877

• A statistical analysis of circumstellar material in Type Ia supernovae

  Monthly Notices of the Royal Astronomical Society · 2013 · https://doi.org/10.1093/mnras/stt1586

• Slowly fading super-luminous supernovae that are not pair-instability explosions

  Nature · 2013 · https://doi.org/10.1038/nature12569

• TWO SUPERLUMINOUS SUPERNOVAE FROM THE EARLY UNIVERSE DISCOVERED BY THE SUPERNOVA LEGACY SURVEY

  The Astrophysical Journal · 2013 · 10.1088/0004-637x/779/2/98

• The host galaxies of Type Ia supernovae discovered by the Palomar Transient Factory

  Monthly Notices of the Royal Astronomical Society · 2013 · 10.1093/mnras/stt2287

• SUPER-LUMINOUS TYPE Ic SUPERNOVAE: CATCHING A MAGNETAR BY THE TAIL

  The Astrophysical Journal · 2013 · https://doi.org/10.1088/0004-637x/770/2/128

• THE VERY YOUNG TYPE Ia SUPERNOVA 2013dy: DISCOVERY, AND STRONG CARBON ABSORPTION IN EARLY-TIME SPECTRA

  The Astrophysical Journal Letters · 2013 · 10.1088/2041-8205/778/1/l15

• Las Cumbres Observatory Global Telescope Network

  Publications of the Astronomical Society of the Pacific · 2013 · https://doi.org/10.1086/673168

• DISCOVERY, PROGENITOR AND EARLY EVOLUTION OF A STRIPPED ENVELOPE SUPERNOVA iPTF13bvn

  The Astrophysical Journal Letters · 2013 · 10.1088/2041-8205/775/1/l7

• EARLY RADIO AND X-RAY OBSERVATIONS OF THE YOUNGEST NEARBY TYPE Ia SUPERNOVA PTF 11kly (SN 2011fe)

  The Astrophysical Journal · 2012 · 10.1088/0004-637x/746/1/21

• PTF 11kx: A Type Ia Supernova with a Symbiotic Nova Progenitor

  Science · 2012 · https://doi.org/10.1126/science.1219164

• CALCIUM-RICH GAP TRANSIENTS IN THE REMOTE OUTSKIRTS OF GALAXIES

  The Astrophysical Journal · 2012 · 10.1088/0004-637x/755/2/161

• Supernova SN 2011fe from an exploding carbon–oxygen white dwarf star

  Nature · 2011 · https://doi.org/10.1038/nature10644

• Exclusion of a luminous red giant as a companion star to the progenitor of supernova SN 2011fe

  Nature · 2011 · 10.1038/nature10646

• A COMPACT DEGENERATE PRIMARY-STAR PROGENITOR OF SN 2011fe

  The Astrophysical Journal Letters · 2011 · 10.1088/2041-8205/744/2/l17

• SN 2011dh: DISCOVERY OF A TYPE IIb SUPERNOVA FROM A COMPACT PROGENITOR IN THE NEARBY GALAXY M51

  The Astrophysical Journal Letters · 2011 · 10.1088/2041-8205/742/2/l18

• Type Ia supernovae as stellar endpoints and cosmological tools

  Nature Communications · 2011 · 10.1038/ncomms1344

• REAL-TIME DETECTION AND RAPID MULTIWAVELENGTH FOLLOW-UP OBSERVATIONS OF A HIGHLY SUBLUMINOUS TYPE II-P SUPERNOVA FROM THE PALOMAR TRANSIENT FACTORY SURVEY

  The Astrophysical Journal · 2011 · 10.1088/0004-637x/736/2/159

• Hydrogen-poor superluminous stellar explosions

  Nature · 2011 · https://doi.org/10.1038/nature10095

• SNLS3: CONSTRAINTS ON DARK ENERGY COMBINING THE SUPERNOVA LEGACY SURVEY THREE-YEAR DATA WITH OTHER PROBES

  The Astrophysical Journal · 2011 · 10.1088/0004-637x/737/2/102

• The dependence of Type Ia Supernovae luminosities on their host galaxies

  Monthly Notices of the Royal Astronomical Society · 2010 · 10.1111/j.1365-2966.2010.16731.x

• SUPERNOVA PTF 09UJ: A POSSIBLE SHOCK BREAKOUT FROM A DENSE CIRCUMSTELLAR WIND

  The Astrophysical Journal · 2010 · 10.1088/0004-637x/724/2/1396

• THE EXTREME HOSTS OF EXTREME SUPERNOVAE

  The Astrophysical Journal · 2010 · 10.1088/0004-637x/727/1/15

• CORE-COLLAPSE SUPERNOVAE FROM THE PALOMAR TRANSIENT FACTORY: INDICATIONS FOR A DIFFERENT POPULATION IN DWARF GALAXIES

  The Astrophysical Journal · 2010 · 10.1088/0004-637x/721/1/777

• The Supernova Legacy Survey 3-year sample: Type Ia supernovae photometric distances and cosmological constraints

  Astronomy and Astrophysics · 2010 · 10.1051/0004-6361/201014468

• SUPERNOVA CONSTRAINTS AND SYSTEMATIC UNCERTAINTIES FROM THE FIRST THREE YEARS OF THE SUPERNOVA LEGACY SURVEY

  The Astrophysical Journal Supplement Series · 2010 · 10.1088/0067-0049/192/1/1

• RAPIDLY DECAYING SUPERNOVA 2010X: A CANDIDATE “.Ia” EXPLOSION

  The Astrophysical Journal Letters · 2010 · https://doi.org/10.1088/2041-8205/723/1/l98

• SPECTRA AND HUBBLE SPACE TELESCOPE LIGHT CURVES OF SIX TYPE Ia SUPERNOVAE AT 0.511 < z < 1.12 AND THE UNION2 COMPILATION

  The Astrophysical Journal · 2010 · https://doi.org/10.1088/0004-637x/716/1/712

• Exploring the Optical Transient Sky with the Palomar Transient Factory

  Publications of the Astronomical Society of the Pacific · 2009 · https://doi.org/10.1086/605911

• THE CARNEGIE SUPERNOVA PROJECT: FIRST NEAR-INFRARED HUBBLE DIAGRAM TOz∼ 0.7

  The Astrophysical Journal · 2009 · 10.1088/0004-637x/704/2/1036

• The core-collapse rate from the Supernova Legacy Survey

  Astronomy and Astrophysics · 2009 · 10.1051/0004-6361/200911847

• The Palomar Transient Factory: System Overview, Performance, and First Results

  Publications of the Astronomical Society of the Pacific · 2009 · https://doi.org/10.1086/648598

• Photometric calibration of the Supernova Legacy Survey fields

  Astronomy and Astrophysics · 2009 · 10.1051/0004-6361/200912446

• SiFTO: An Empirical Method for Fitting SN Ia Light Curves

  The Astrophysical Journal · 2008 · 10.1086/588518

• Supernova Shock Breakout from a Red Supergiant

  Science · 2008 · 10.1126/science.1160456

• Verifying the Cosmological Utility of Type Ia Supernovae: Implications of a Dispersion in the Ultraviolet Spectra

  The Astrophysical Journal · 2008 · 10.1086/524981

• Predicted and Observed Evolution in the Mean Properties of Type Ia Supernovae with Redshift

  The Astrophysical Journal · 2007 · 10.1086/522030

• K ‐Corrections and Spectral Templates of Type Ia Supernovae

  The Astrophysical Journal · 2007 · 10.1086/518232

• Is There Evidence for a Hubble Bubble? The Nature of Type Ia Supernova Colors and Dust in External Galaxies

  The Astrophysical Journal · 2007 · 10.1086/520625

• Rates and Properties of Type Ia Supernovae as a Function of Mass and Star Formation in Their Host Galaxies

  CaltechAUTHORS (California Institute of Technology) · 2006

• The Supernova Legacy Survey: measurement of $\Omega_{\mathsf{M}}$, $\Omega_\mathsf{\Lambda}$ and w from the first year data set

  Astronomy and Astrophysics · 2006 · https://doi.org/10.1051/0004-6361:20054185

• The Type Ia Supernova Rate atz ≈ 0.5 from the Supernova Legacy Survey

  The Astronomical Journal · 2006 · 10.1086/505532

• The Supernova Legacy Survey: measurement of ! M, ! ! and w from the first year data set ! ,! !

  · 2006

• Toward a Cosmological Hubble Diagram for Type II‐P Supernovae

  The Astrophysical Journal · 2006 · 10.1086/504413

• The type Ia supernova SNLS-03D3bb from a super-Chandrasekhar-mass white dwarf star

  Nature · 2006 · 10.1038/nature05103

• Gemini Spectroscopy of Supernovae from the Supernova Legacy Survey: Improving High‐Redshift Supernova Selection and Classification

  The Astrophysical Journal · 2005 · 10.1086/497119

• Spectroscopic Observations and Analysis of the Peculiar SN 1999aa

  The Astronomical Journal · 2004 · 10.1086/421747

• The Hubble diagram of type Ia supernovae as a function of host galaxy morphology

  Monthly Notices of the Royal Astronomical Society · 2003 · https://doi.org/10.1046/j.1365-8711.2003.06312.x

• Analysis of the Flux and Polarization Spectra of the Type Ia Supernova SN 2001el: Exploring the Geometry of the High‐Velocity Ejecta

  The Astrophysical Journal · 2003 · 10.1086/376601

• Overview of the Nearby Supernova Factory

  Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · 2002 · 10.1117/12.458107

• The Distant Type Ia Supernova Rate

  The Astrophysical Journal · 2002 · 10.1086/342129

• Evidence for Asphericity in a Subluminous Type Ia Supernova: Spectropolarimetry of SN 1999by

  The Astrophysical Journal · 2001 · 10.1086/321584

• Bipolar Supernova Explosions

  The Astrophysical Journal · 2001 · 10.1086/319822

Current projects

No projects listed.