Search Results - "Jha, Saurabh W."
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Observational properties of thermonuclear supernovae
Published in Nature astronomy (01-08-2019)“…The explosive death of a star as a supernova is one of the most dramatic events in the Universe. Supernovae have an outsized impact on many areas of…”
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The Pantheon+ Analysis: Cosmological Constraints
Published in The Astrophysical journal (01-10-2022)“…Abstract We present constraints on cosmological parameters from the Pantheon+ analysis of 1701 light curves of 1550 distinct Type Ia supernovae (SNe Ia)…”
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Three Hypervelocity White Dwarfs in Gaia DR2: Evidence for Dynamically Driven Double-degenerate Double-detonation Type Ia Supernovae
Published in The Astrophysical journal (20-09-2018)“…Double detonations in double white dwarf (WD) binaries undergoing unstable mass transfer have emerged in recent years as one of the most promising Type Ia…”
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Environmental Dependence of Type Ia Supernovae in Low-redshift Galaxy Clusters
Published in The Astrophysical journal (01-02-2024)“…Abstract We present an analysis of 102 Type Ia supernovae (SNe Ia) in nearby ( z < 0.1), x-ray-selected galaxy clusters. This is the largest such sample to…”
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Designing an Optimal LSST Deep Drilling Program for Cosmology with Type Ia Supernovae
Published in The Astrophysical journal. Supplement series (01-01-2023)“…Abstract The Vera C. Rubin Observatory’s Legacy Survey of Space and Time (LSST) is forecast to collect a large sample of Type Ia supernovae (SNe Ia) expected…”
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A Cohesive Deep Drilling Field Strategy for LSST Cosmology
Published in The Astrophysical journal. Supplement series (01-12-2024)“…Abstract The Vera C. Rubin Observatory Legacy Survey of Space and Time (LSST) will image billions of astronomical objects in the wide–fast–deep primary survey…”
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A Luminous Red Supergiant and Dusty Long-period Variable Progenitor for SN 2023ixf
Published in Astrophysical journal. Letters (01-08-2023)“…Abstract We analyze pre-explosion near- and mid-infrared (IR) imaging of the site of SN 2023ixf in the nearby spiral galaxy M101 and characterize the candidate…”
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The Young and Nearby Normal Type Ia Supernova 2018gv: UV-optical Observations and the Earliest Spectropolarimetry
Published in The Astrophysical journal (01-10-2020)“…Abstract The nondetection of companion stars in SN Ia progenitor systems lends support to the notion of double-degenerate systems and explosions triggered by…”
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Circumstellar Medium Interaction in SN 2018lab, A Low-luminosity Type IIP Supernova Observed with TESS
Published in The Astrophysical journal (01-03-2023)“…Abstract We present photometric and spectroscopic data of SN 2018lab, a low-luminosity Type IIP supernova (LLSN) with a V -band peak luminosity of −15.1 ± 0.1…”
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Ultraviolet Spectroscopy and TARDIS Models of the Broad-lined Type Ic Supernova 2014ad
Published in The Astrophysical journal (01-09-2022)“…Abstract Few published ultraviolet (UV) spectra exist for stripped-envelope supernovae and none to date for broad-lined Type Ic supernovae (SNe Ic-bl). These…”
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Exclusion of a luminous red giant as a companion star to the progenitor of supernova SN 2011fe
Published in Nature (London) (15-12-2011)“…Archival images of the progenitor system of supernova SN 2011fe are so sensitive that the presence of luminous red giants or most helium stars is directly…”
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Ca hnk: The Calcium-rich Transient Supernova 2016hnk from a Helium Shell Detonation of a Sub-Chandrasekhar White Dwarf
Published in The Astrophysical journal (01-06-2020)“…We present observations and modeling of SN 2016hnk, a Ca-rich supernova (SN) that is consistent with being the result of a He-shell double-detonation explosion…”
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THE SDSS-II SUPERNOVA SURVEY: PARAMETERIZING THE TYPE Ia SUPERNOVA RATE AS A FUNCTION OF HOST GALAXY PROPERTIES
Published in The Astrophysical journal (10-08-2012)“…Using data from the Sloan Digital Sky Supernova Survey-II (SDSS-II SN Survey), we measure the rate of Type Ia supernovae (SNe Ia) as a function of galaxy…”
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The Effect of Host Galaxies on Type Ia Supernovae in the SDSS-II Supernova Survey
Published in The Astrophysical journal (10-10-2010)“…We present an analysis of the host galaxy dependences of Type Ia Supernovae (SNe Ia) from the full three year sample of the SDSS-II Supernova Survey. We…”
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Red and Reddened: Ultraviolet through Near-infrared Observations of Type Ia Supernova 2017erp
Published in The Astrophysical journal (01-06-2019)“…Abstract We present space-based ultraviolet/optical photometry and spectroscopy with the Swift Ultra-Violet/Optical Telescope and Hubble Space Telescope ( HST…”
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SN 2022jox: An Extraordinarily Ordinary Type II SN with Flash Spectroscopy
Published in The Astrophysical journal (01-04-2024)“…Abstract We present high-cadence optical and ultraviolet (UV) observations of the Type II supernova (SN), SN 2022jox which exhibits early spectroscopic…”
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JWST Spectroscopy of SN H0pe: Classification and Time Delays of a Triply Imaged Type Ia Supernova at z = 1.78
Published in The Astrophysical journal (01-08-2024)“…Abstract SN H0pe is a triply imaged supernova (SN) at redshift z = 1.78 discovered using the James Webb Space Telescope. In order to classify the SN…”
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Observational Properties of a Bright Type lax SN 2018cni and a Faint Type Iax SN 2020kyg
Published in The Astrophysical journal (01-08-2023)“…Abstract We present the optical photometric and spectroscopic analysis of two Type Iax supernovae (SNe), 2018cni and 2020kyg. SN 2018cni is a bright Type Iax…”
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Over 500 Days in the Life of the Photosphere of the Type Iax Supernova SN 2014dt
Published in The Astrophysical journal (01-07-2023)“…Abstract Type Iax supernovae (SNe Iax) are the largest known class of peculiar white dwarf SNe, distinct from normal Type Ia supernovae (SNe Ia). The unique…”
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SN 2019ewu: A Peculiar Supernova with Early Strong Carbon and Weak Oxygen Features from a New Sample of Young SN Ic Spectra
Published in Astrophysical journal. Letters (01-02-2023)“…Abstract With the advent of high-cadence, all-sky automated surveys, supernovae (SNe) are now discovered closer than ever to their dates of explosion. However,…”
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