Search Results - "Riess, Adam G"

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

Comparing Tip of the Red Giant Branch Distance Scales: An Independent Reduction of the Carnegie-Chicago Hubble Program and the Value of the Hubble Constant by Anand, Gagandeep S., Tully, R. Brent, Rizzi, Luca, Riess, Adam G., Yuan, Wenlong

“…Abstract The tip of the red giant branch has been used to measure distances to 500 nearby galaxies with the Hubble Space Telescope (HST) which are available in…”
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

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

On Cepheid Distance Scale Bias Due to Stellar Companions and Cluster Populations by Anderson, Richard I., Riess, Adam G.

“…State-of-the-art photometric measurements of extragalactic Cepheids account for the mean additional light due to chance superposition of Cepheids on crowded…”
Get full text

A Gaia Data Release 3 View on the Tip of the Red Giant Branch Luminosity by Li, Siyang, Casertano, Stefano, Riess, Adam G.

“…Abstract The tip of the red giant branch (TRGB) is a standard candle that can be used to help refine the determination of the Hubble constant. Gaia Data…”
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 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

Reconnaissance with JWST of the J-region Asymptotic Giant Branch in Distance Ladder Galaxies: From Irregular Luminosity Functions to Approximation of the Hubble Constant by Li, Siyang, Riess, Adam G., Casertano, Stefano, Anand, Gagandeep S., Scolnic, Daniel M., Yuan, Wenlong, Breuval, Louise, Huang, Caroline D.

“…Abstract We study stars in the J-regions of the asymptotic giant branch (JAGB) of near-infrared color–magnitude diagrams in the maser host NGC 4258 and four…”
Get full text

Dependence of Cosmological Constraints on Gray Photometric Zero-point Uncertainties of Supernova Surveys by Brownsberger, Sasha R., Brout, Dillon, Scolnic, Daniel, Stubbs, Christopher W., Riess, Adam G.

“…Abstract Type Ia supernova (SN) measurements of the Hubble constant, H 0 ; cosmic mass density, Ω M ; and dark energy equation-of-state parameter, w , rely on…”
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

The expansion of the Universe is faster than expected by Riess, Adam G.

“…The present rate of the expansion of our Universe, the Hubble constant, can be predicted from the cosmological model using measurements of the early Universe,…”
Get full text

Standardized Luminosity of the Tip of the Red Giant Branch Utilizing Multiple Fields in NGC 4258 and the CATs Algorithm by Li, Siyang, Riess, Adam G., Scolnic, Daniel, Anand, Gagandeep S., Wu, Jiaxi, Casertano, Stefano, Yuan, Wenlong, Beaton, Rachael, Anderson, Richard I.

“…Abstract The tip of the red giant branch provides a luminous standard candle for calibrating distance ladders that reach Type Ia supernova (SN Ia) hosts…”
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

PARALLAX OF GALACTIC CEPHEIDS FROM SPATIALLY SCANNING THE WIDE FIELD CAMERA 3 ON THE HUBBLE SPACE TELESCOPE: THE CASE OF SS CANIS MAJORIS by Casertano, Stefano, Riess, Adam G., Anderson, Jay, Anderson, Richard I., Bowers, J. Bradley, Clubb, Kelsey I., Cukierman, Aviv R., Filippenko, Alexei V., Graham, Melissa L., MacKenty, John W., Melis, Carl, Tucker, Brad E., Upadhya, Gautam

“…ABSTRACT We present a high-precision measurement of the parallax for the 12-day Cepheid SS Canis Majoris, obtained via spatial scanning with the Wide Field…”
Get full text