Search Results - "Neill, James D."
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Cosmicflows-4: The Calibration of Optical and Infrared Tully-Fisher Relations
Published in The Astrophysical journal (01-06-2020)“…This study is a part of the Cosmicflows-4 project with the aim of measuring the distances of more than ∼10,000 spiral galaxies in the local universe up to…”
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The Keck Cosmic Web Imager Integral Field Spectrograph
Published in The Astrophysical journal (01-09-2018)“…We report on the design and performance of the Keck Cosmic Web Imager (KCWI), a general purpose optical integral field spectrograph that has been installed at…”
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Cosmicflows-4: The Catalog of ∼10,000 Tully-Fisher Distances
Published in The Astrophysical journal (01-10-2020)“…We present the distances of 9792 spiral galaxies lying within 15,000 km s−1 using the relation between luminosity and rotation rate of spiral galaxies. The…”
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The Dark Matter Distributions in Low-mass Disk Galaxies. II. The Inner Density Profiles
Published in The Astrophysical journal (10-12-2019)“…Dark-matter-only simulations predict that dark matter halos have steep, cuspy inner density profiles, while observations of dwarf galaxies find a range of…”
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A giant protogalactic disk linked to the cosmic web
Published in Nature (London) (13-08-2015)“…A two-dimensional spectroscopic investigation of a large, luminous filament of the cosmic web near QSO UM287 reveals that the brightest emission region is an…”
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Andromeda's Parachute: A Bright Quadruply Lensed Quasar at z = 2.377
Published in The Astrophysical journal (01-06-2018)“…We present Keck Cosmic Web Imager spectroscopy of the four putative images of the lensed quasar candidate J014710+463040 recently discovered by Berghea et al…”
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iPTF 16hgs: A Double-peaked Ca-rich Gap Transient in a Metal-poor, Star-forming Dwarf Galaxy
Published in The Astrophysical journal (10-10-2018)“…Calcium-rich gap transients represent an intriguing new class of faint and fast-evolving supernovae that exhibit strong [Ca ii] emission in their nebular phase…”
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A 9 Month Hubble Space Telescope Near-UV Survey of M87. I. Light and Color Curves of 94 Novae, and a Redetermination of the Nova Rate
Published in The Astrophysical journal. Supplement series (01-12-2023)“…Abstract M87 has been monitored with a cadence of 5 days over a span of 9 months through the near-ultraviolet (NUV; F275W) and optical (F606W) filters of the…”
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Expansion Properties of the Young Supernova Type Iax Remnant Pa 30 Revealed
Published in Astrophysical journal. Letters (01-11-2024)“…Abstract The recently discovered Pa 30 nebula, the putative type Iax supernova remnant associated with the historical supernova of 1181 AD, shows puzzling…”
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Long-rising Type II Supernovae in the Zwicky Transient Facility Census of the Local Universe
Published in The Astrophysical journal (01-12-2023)“…Abstract SN 1987A was an unusual hydrogen-rich core-collapse supernova originating from a blue supergiant star. Similar blue supergiant explosions remain a…”
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Supernova PTF 12glz: A Possible Shock Breakout Driven through an Aspherical Wind
Published in The Astrophysical journal (20-02-2019)“…We present visible-light and ultraviolet (UV) observations of the supernova PTF 12glz. The SN was discovered and monitored in the near-UV and R bands as part…”
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The type Ia supernova SNLS-03D3bb from a super-Chandrasekhar-mass white dwarf star
Published in Nature (21-09-2006)“…The accelerating expansion of the Universe, and the need for dark energy, were inferred from observations of type Ia supernovae. There is a consensus that type…”
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A turbulent wake as a tracer of 30,000 years of Mira's mass loss history
Published in Nature (London) (16-08-2007)“…Mira is one of the first variable stars ever discovered and it is the prototype (and also the nearest example) of a class of low-to-intermediate-mass stars in…”
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Toward a Cosmological Hubble Diagram for Type II-P Supernovae
Published in The Astrophysical journal (10-07-2006)“…We present the first high-redshift Hubble diagram for Type II-P supernovae (SNe II-P) based on five events at redshift up to z 6 0.3. This diagram was…”
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The SED Machine: A Robotic Spectrograph for Fast Transient Classification
Published in Publications of the Astronomical Society of the Pacific (01-03-2018)“…Current time domain facilities are finding several hundreds of transient astronomical events a year. The discovery rate is expected to increase in the future…”
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The FLASHES Survey. I. Integral Field Spectroscopy of the CGM around 48 z 2.3-3.1 QSOs
Published in The Astrophysical journal (01-05-2020)“…We present the pilot study of the Fluorescent Lyman-Alpha Structures in High-z Environments Survey; the largest integral field spectroscopy survey to date of…”
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Direct evidence of AGN feedback: a post-starburst galaxy stripped of its gas by AGN-driven winds
Published in Monthly notices of the Royal Astronomical Society (01-11-2018)Get full text
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A New Class of Changing-look LINERs
Published in The Astrophysical journal (20-09-2019)“…We report the discovery of six active galactic nuclei (AGNs) caught "turning on" during the first nine months of the Zwicky Transient Facility (ZTF) survey…”
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Real-time discovery of AT2020xnd: a fast, luminous ultraviolet transient with minimal radioactive ejecta
Published in Monthly notices of the Royal Astronomical Society (01-12-2021)“…ABSTRACT The many unusual properties of the enigmatic AT2018cow suggested that at least some subset of the empirical class of fast blue optical transients…”
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ZTF Early Observations of Type Ia Supernovae. I. Properties of the 2018 Sample
Published in The Astrophysical journal (01-12-2019)“…Early-time observations of Type Ia supernovae (SNe Ia) are essential to constrain the properties of their progenitors. In this paper, we present high-quality…”
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