Search Results - "Macri, Lucas"

Large Magellanic Cloud Cepheid Standards Provide a 1% Foundation for the Determination of the Hubble Constant and Stronger Evidence for Physics beyond ΛCDM by Riess, Adam G., Casertano, Stefano, Yuan, Wenlong, Macri, Lucas M., Scolnic, Dan

“…We present an improved determination of the Hubble constant from Hubble Space Telescope (HST) observations of 70 long-period Cepheids in the Large Magellanic…”
Get full text

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 by Yuan, Wenlong, Riess, Adam G., Macri, Lucas M., Casertano, Stefano, Scolnic, Daniel M.

“…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…”
Get full text

Hubble Space Telescope Observations of Mira Variables in the SN Ia Host NGC 1559: An Alternative Candle to Measure the Hubble Constant by Huang, Caroline D., Riess, Adam G., Yuan, Wenlong, Macri, Lucas M., Zakamska, Nadia L., Casertano, Stefano, Whitelock, Patricia A., Hoffmann, Samantha L., Filippenko, Alexei V., Scolnic, Daniel

“…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…”
Get full text

A 2.4% DETERMINATION OF THE LOCAL VALUE OF THE HUBBLE CONSTANT by Riess, Adam G, Macri, Lucas M, Hoffmann, Samantha L, Scolnic, Dan, Casertano, Stefano, Filippenko, Alexei V, Tucker, Brad E, Reid, Mark J, Jones, David O, Silverman, Jeffrey M, Chornock, Ryan, Challis, Peter, Yuan, Wenlong, Brown, Peter J, Foley, Ryan J

“…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…”
Get full text

Milky Way Cepheid Standards for Measuring Cosmic Distances and Application to Gaia DR2: Implications for the Hubble Constant by Riess, Adam G., Casertano, Stefano, Yuan, Wenlong, Macri, Lucas, Bucciarelli, Beatrice, Lattanzi, Mario G., MacKenty, John W., Bowers, J. Bradley, Zheng, WeiKang, Filippenko, Alexei V., Huang, Caroline, Anderson, Richard I.

“…We present Hubble Space Telescope (HST) photometry of a selected sample of 50 long-period, low-extinction Milky Way Cepheids measured on the same WFC3 F555W-,…”
Get full text

New Parallaxes of Galactic Cepheids from Spatially Scanning the Hubble Space Telescope: Implications for the Hubble Constant by Riess, Adam G., Casertano, Stefano, Yuan, Wenlong, Macri, Lucas, Anderson, Jay, MacKenty, John W., Bowers, J. Bradley, Clubb, Kelsey I., Filippenko, Alexei V., Jones, David O., Tucker, Brad E.

“…We present new measurements of the parallax of seven long-period (≥10 days) Milky Way (MW) Cepheid variables (SS CMa, XY Car, VY Car, VX Per, WZ Sgr, X Pup,…”
Get full text

Cluster Cepheids with High Precision Gaia Parallaxes, Low Zero-point Uncertainties, and Hubble Space Telescope Photometry by Riess, Adam G., Breuval, Louise, Yuan, Wenlong, Casertano, Stefano, Macri, Lucas M., Bowers, J. Bradley, Scolnic, Dan, Cantat-Gaudin, Tristan, Anderson, Richard I., Reyes, Mauricio Cruz

“…Abstract We present Hubble Space Telescope (HST) photometry of 17 Cepheids in open clusters and their cluster mean parallaxes from Gaia EDR3. These parallaxes…”
Get full text

JWST Observations Reject Unrecognized Crowding of Cepheid Photometry as an Explanation for the Hubble Tension at 8σ Confidence by Riess, Adam G., Anand, Gagandeep S., Yuan, Wenlong, Casertano, Stefano, Dolphin, Andrew, Macri, Lucas M., Breuval, Louise, Scolnic, Dan, Perrin, Marshall, Anderson, Richard I.

“…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…”
Get full text

A First Look at Cepheids in a Type Ia Supernova Host with JWST by Yuan, Wenlong, Riess, Adam G., Casertano, Stefano, Macri, Lucas M.

“…Abstract We report the first look at extragalactic Cepheid variables with the James Webb Space Telescope (JWST), obtained from an archival observation of NGC…”
Get full text

A Near-infrared Period-Luminosity Relation for Miras in NGC 4258, an Anchor for a New Distance Ladder by Huang, Caroline D., Riess, Adam G., Hoffmann, Samantha L., Klein, Christopher, Bloom, Joshua, Yuan, Wenlong, Macri, Lucas M., Jones, David O., Whitelock, Patricia A., Casertano, Stefano, Anderson, Richard I.

“…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…”
Get full text

Crowded No More: The Accuracy of the Hubble Constant Tested with High-resolution Observations of Cepheids by JWST by Riess, Adam G., Anand, Gagandeep S., Yuan, Wenlong, Casertano, Stefano, Dolphin, Andrew, Macri, Lucas M., Breuval, Louise, Scolnic, Dan, Perrin, Marshall, Anderson, Richard I.

“…Abstract High-resolution James Webb Space Telescope (JWST) observations can test confusion-limited Hubble Space Telescope (HST) observations for a photometric…”
Get full text

A Sub-2% Distance to M31 from Photometrically Homogeneous Near-infrared Cepheid Period–Luminosity Relations Measured with the Hubble Space Telescope by Li, Siyang, Riess, Adam G., Busch, Michael P., Casertano, Stefano, Macri, Lucas M., Yuan, Wenlong

“…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…”
Get full text

Small Magellanic Cloud Cepheids Observed with the Hubble Space Telescope Provide a New Anchor for the SH0ES Distance Ladder by Breuval, Louise, Riess, Adam G., Casertano, Stefano, Yuan, Wenlong, Macri, Lucas M., Romaniello, Martino, Murakami, Yukei S., Scolnic, Daniel, Anand, Gagandeep S., Soszyński, Igor

“…Abstract We present phase-corrected photometric measurements of 88 Cepheid variables in the core of the Small Magellanic Cloud (SMC), the first sample obtained…”
Get full text

Tip of the Red Giant Branch Distances with JWST: An Absolute Calibration in NGC 4258 and First Applications to Type Ia Supernova Hosts by Anand, Gagandeep S., Riess, Adam G., Yuan, Wenlong, Beaton, Rachael, Casertano, Stefano, Li, Siyang, Makarov, Dmitry I., Makarova, Lidia N., Tully, R. Brent, Anderson, Richard I., Breuval, Louise, Dolphin, Andrew, Karachentsev, Igor D., Macri, Lucas M., Scolnic, Daniel

“…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…”
Get full text

A 1.3% Distance to M33 from Hubble Space Telescope Cepheid Photometry by Breuval, Louise, Riess, Adam G., Macri, Lucas M., Li, Siyang, Yuan, Wenlong, Casertano, Stefano, Konchady, Tarini, Trahin, Boris, Durbin, Meredith J., Williams, Benjamin F.

“…Abstract We present a low-dispersion period–luminosity relation (PL) based on 154 Cepheids in Messier 33 (M33) with Hubble Space Telescope (HST) photometry…”
Get full text

Pulsating stars and the distance scale by Macri, Lucas

“…I present an overview of the latest results from the SH0ES project, which obtained homogeneous Hubble Space Telescope (HST) photometry in the optical and…”
Get full text

On the variation of Fourier parameters for Galactic and LMC Cepheids at optical, near-infrared and mid-infrared wavelengths by Bhardwaj, Anupam, Kanbur, Shashi M, Singh, Harinder P, Macri, Lucas M, Ngeow, Chow-Choong

“…We present a light-curve analysis of fundamental-mode Galactic and Large Magellanic Cloud (LMC) Cepheids based on the Fourier decomposition technique. We have…”
Get full text

Significant luminosity differences of two twin Type Ia supernovae by Foley, Ryan J, Hoffmann, Samantha L, Macri, Lucas M, Riess, Adam G, Brown, Peter J, Filippenko, Alexei V, Graham, Melissa L, Milne, Peter A

“…ABSTRACT The Type Ia supernovae (SNe Ia) 2011by, hosted in NGC 3972, and 2011fe, hosted in M101, are optical ‘twins,’ having almost identical optical…”
Get full text

High-resolution Spectroscopic Metallicities of Milky Way Cepheid Standards and Their Impact on the Leavitt Law and the Hubble Constant by Bhardwaj, Anupam, Riess, Adam G., Catanzaro, Giovanni, Trentin, Erasmo, Ripepi, Vincenzo, Rejkuba, Marina, Marconi, Marcella, Ngeow, Chow-Choong, Macri, Lucas M., Romaniello, Martino, Molinaro, Roberto, Singh, Harinder P., Kanbur, Shashi M.

“…Abstract Milky Way Cepheid variables with accurate Hubble Space Telescope photometry have been established as standards for primary calibration of the cosmic…”
Get full text

OPTICAL IDENTIFICATION OF CEPHEIDS IN 19 HOST GALAXIES OF TYPE Ia SUPERNOVAE AND NGC 4258 WITH THE HUBBLE SPACE TELESCOPE by Hoffmann, Samantha L., Macri, Lucas M., Riess, Adam G., Yuan, Wenlong, Casertano, Stefano, Foley, Ryan J., Filippenko, Alexei V., Tucker, Brad E., Chornock, Ryan, Silverman, Jeffrey M., Welch, Douglas L., Goobar, Ariel, Amanullah, Rahman

“…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…”
Get full text