Search Results - "Macri, Lucas M"
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Consistent Calibration of the Tip of the Red Giant Branch in the Large Magellanic Cloud on the Hubble Space Telescope Photometric System and a Redetermination of the Hubble Constant
Published in The Astrophysical journal (20-11-2019)“…We present a calibration of the tip of the red giant branch (TRGB) in the Large Magellanic Cloud (LMC) on the Hubble Space Telescope (HST)/ACS F814W system. We…”
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Hubble Space Telescope Observations of Mira Variables in the SN Ia Host NGC 1559: An Alternative Candle to Measure the Hubble Constant
Published in The Astrophysical journal (20-01-2020)“…We present year-long, near-infrared Hubble Space Telescope (HST) WFC3 observations used to search for Mira variables in NGC 1559, the host galaxy of the Type…”
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A 2.4% DETERMINATION OF THE LOCAL VALUE OF THE HUBBLE CONSTANT
Published in The Astrophysical journal (20-07-2016)“…ABSTRACT We use the Wide Field Camera 3 (WFC3) on the Hubble Space Telescope (HST) to reduce the uncertainty in the local value of the Hubble constant from…”
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4
JWST Observations Reject Unrecognized Crowding of Cepheid Photometry as an Explanation for the Hubble Tension at 8σ Confidence
Published in Astrophysical journal. Letters (01-02-2024)“…Abstract We present high-definition observations with the James Webb Space Telescope (JWST) of >1000 Cepheids in a geometric anchor of the distance ladder, NGC…”
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5
A Near-infrared Period-Luminosity Relation for Miras in NGC 4258, an Anchor for a New Distance Ladder
Published in The Astrophysical journal (10-04-2018)“…We present year-long, near-infrared (NIR) Hubble Space Telescope (HST) WFC3 observations of Mira variables in the water megamaser host galaxy NGC 4258. Miras…”
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Crowded No More: The Accuracy of the Hubble Constant Tested with High-resolution Observations of Cepheids by JWST
Published in Astrophysical journal. Letters (01-10-2023)“…Abstract High-resolution James Webb Space Telescope (JWST) observations can test confusion-limited Hubble Space Telescope (HST) observations for a photometric…”
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Small Magellanic Cloud Cepheids Observed with the Hubble Space Telescope Provide a New Anchor for the SH0ES Distance Ladder
Published in The Astrophysical journal (01-09-2024)“…Abstract We present phase-corrected photometric measurements of 88 Cepheid variables in the core of the Small Magellanic Cloud (SMC), the first sample obtained…”
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Tip of the Red Giant Branch Distances with JWST: An Absolute Calibration in NGC 4258 and First Applications to Type Ia Supernova Hosts
Published in The Astrophysical journal (01-05-2024)“…Abstract The tip of the red giant branch (TRGB) allows for the measurement of precise and accurate distances to nearby galaxies based on the brightest ascent…”
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9
A 1.3% Distance to M33 from Hubble Space Telescope Cepheid Photometry
Published in The Astrophysical journal (01-07-2023)“…Abstract We present a low-dispersion period–luminosity relation (PL) based on 154 Cepheids in Messier 33 (M33) with Hubble Space Telescope (HST) photometry…”
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10
Significant luminosity differences of two twin Type Ia supernovae
Published in Monthly notices of the Royal Astronomical Society (01-02-2020)“…ABSTRACT The Type Ia supernovae (SNe Ia) 2011by, hosted in NGC 3972, and 2011fe, hosted in M101, are optical ‘twins,’ having almost identical optical…”
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High-resolution Spectroscopic Metallicities of Milky Way Cepheid Standards and Their Impact on the Leavitt Law and the Hubble Constant
Published in Astrophysical journal. Letters (01-09-2023)“…Abstract Milky Way Cepheid variables with accurate Hubble Space Telescope photometry have been established as standards for primary calibration of the cosmic…”
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12
Groups of Galaxies in the Two Micron All Sky Redshift Survey
Published in The Astrophysical journal (01-02-2007)“…We present the results of applying a percolation algorithm to the initial release of the Two Micron All Sky Survey Extended Source Catalog, using subsequently…”
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Large Magellanic Cloud Cepheid Standards Provide a 1% Foundation for the Determination of the Hubble Constant and Stronger Evidence for Physics beyond ΛCDM
Published in The Astrophysical journal (01-05-2019)“…We present an improved determination of the Hubble constant from Hubble Space Telescope (HST) observations of 70 long-period Cepheids in the Large Magellanic…”
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14
The luminosity of SN 1999by in NGC 2841 and the nature of peculiar type Ia supernovae
Published in The Astrophysical journal (01-10-2004)“…We present UBVRIJHK photometry and optical spectroscopy of the so-called peculiar Type Ia supernova 1999by in NGC 2841. The observations began 1 week before…”
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Cluster Cepheids with High Precision Gaia Parallaxes, Low Zero-point Uncertainties, and Hubble Space Telescope Photometry
Published in The Astrophysical journal (01-10-2022)“…Abstract We present Hubble Space Telescope (HST) photometry of 17 Cepheids in open clusters and their cluster mean parallaxes from Gaia EDR3. These parallaxes…”
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A First Look at Cepheids in a Type Ia Supernova Host with JWST
Published in Astrophysical journal. Letters (01-11-2022)“…Abstract We report the first look at extragalactic Cepheid variables with the James Webb Space Telescope (JWST), obtained from an archival observation of NGC…”
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A Sub-2% Distance to M31 from Photometrically Homogeneous Near-infrared Cepheid Period–Luminosity Relations Measured with the Hubble Space Telescope
Published in The Astrophysical journal (01-10-2021)“…Abstract We present period–luminosity relations (PLRs) for 55 Cepheids in M31 with periods ranging from 4 to 78 days observed with the Hubble Space Telescope…”
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On the variation of Fourier parameters for Galactic and LMC Cepheids at optical, near-infrared and mid-infrared wavelengths
Published in Monthly notices of the Royal Astronomical Society (11-03-2015)“…We present a light-curve analysis of fundamental-mode Galactic and Large Magellanic Cloud (LMC) Cepheids based on the Fourier decomposition technique. We have…”
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SN 2012cg: EVIDENCE FOR INTERACTION BETWEEN A NORMAL SN Ia AND A NON-DEGENERATE BINARY COMPANION
Published in The Astrophysical journal (01-04-2016)“…ABSTRACT We report evidence for excess blue light from the Type Ia supernova (Sn Ia) SN 2012cg at 15 and 16 days before maximum B-band brightness. The emission…”
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OPTICAL IDENTIFICATION OF CEPHEIDS IN 19 HOST GALAXIES OF TYPE Ia SUPERNOVAE AND NGC 4258 WITH THE HUBBLE SPACE TELESCOPE
Published in The Astrophysical journal (10-10-2016)“…ABSTRACT We present results of an optical search conducted as part of the SH0ES project (Supernovae and H 0 for the Equation of State of dark energy) for…”
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