As part of the cosmology analysis using Type Ia Supernovae (SN Ia) in the Dark Energy Survey (DES), we present photometrically identified SN Ia samples using...
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PublicationThe dark energy survey 5-yr photometrically identified type Ia supernovae
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PublicationThe Dark Energy Survey supernova programme: modelling selection efficiency and observed core-collapse supernova contamination
The analysis of current and future cosmological surveys of Type Ia supernovae (SNe Ia) at high redshift depends on the accurate photometric classification of...
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TalkThe death and afterlife of massive stars
Observations of supernovae and gamma-ray bursts show that massive stars end their lives with a wide variety of properties. For supernovae, mass loss plays a...
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PublicationThe early nucleosynthesis of O and Fe
The new observational O/Fe vs Fe/H relationship in halo dwarfs is analyzed in terms of a model of chemical evolution for the solar neighborhood. The role of...
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PublicationThe effect of environment on Type Ia supernovae in the Dark Energy Survey three-year cosmological sample
Analyses of Type Ia supernovae (SNe Ia) have found puzzling correlations between their standardized luminosities and host galaxy properties: SNe Ia in high-mass...
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PublicationThe ELM Survey. IV. 24 White Dwarf Merger Systems
We present new radial velocity and X-ray observations of extremely low mass (ELM, ~0.2 M &sun;) white dwarf (WD) candidates in the Sloan Digital Sky Survey Data...
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PublicationThe evolution of luminous red nova AT 2017jfs in NGC 4470
We present the results of our photometric and spectroscopic follow-up of the intermediate-luminosity optical transient AT 2017jfs. At peak, the object reaches...
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PublicationThe Fast X-Ray Transient XRT 210423 and Its Host Galaxy
Fast X-ray Transients (FXTs) are X-ray flares with durations ranging from a few hundred seconds to a few hours. Possible origins include the tidal disruption of...
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PublicationThe first year of SN 2004dj in NGC 2403
New BV RI photometry and optical spectroscopy of the Type IIp supernova 2004dj in NGC 2403, obtained during the first year since discovery, are presented. The...