Zobrazeno 1 - 10
of 1 474
pro vyhledávání: '"Casertano, A."'
Autor:
Riess, Adam G., Scolnic, Dan, Anand, Gagandeep S., Breuval, Louise, Casertano, Stefano, Macri, Lucas M., Li, Siyang, Yuan, Wenlong, Huang, Caroline D., Jha, Saurabh, Murakami, Yukei S., Beaton, Rachael, Brout, Dillon, Wu, Tianrui, Addison, Graeme E., Bennett, Charles, Anderson, Richard I., Filippenko, Alexei V., Carr, Anthony
JWST provides new opportunities to cross-check the HST Cepheid/SNeIa distance ladder, which yields the most precise local measure of H0. We analyze early JWST subsamples (~1/4 of the HST sample) from the SH0ES and CCHP groups, calibrated by a single
Externí odkaz:
http://arxiv.org/abs/2408.11770
Autor:
Li, Siyang, Anand, Gagandeep S., Riess, Adam G., Casertano, Stefano, Yuan, Wenlong, Breuval, Louise, Macri, Lucas M., Scolnic, Daniel, Beaton, Rachael, Anderson, Richard I.
Publikováno v:
ApJ 976 177 2024
The Hubble Tension, a >5 sigma discrepancy between direct and indirect measurements of the Hubble constant (H0), has persisted for a decade and motivated intense scrutiny of the paths used to infer H0. Comparing independently-derived distances for a
Externí odkaz:
http://arxiv.org/abs/2408.00065
Autor:
Breuval, Louise, Riess, Adam G., Casertano, Stefano, Yuan, Wenlong, Macri, Lucas M., Romaniello, Martino, Murakami, Yukei S., Scolnic, Daniel, Anand, Gagandeep S., Soszyński, Igor
Publikováno v:
The Astrophysical Journal (2024), 973, 30
We present phase-corrected photometric measurements of 88 Cepheid variables in the core of the Small Magellanic Cloud (SMC), the first sample obtained with the Hubble Space Telescope's (HST) Wide Field Camera 3, in the same homogeneous photometric sy
Externí odkaz:
http://arxiv.org/abs/2404.08038
Autor:
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
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 of low-mass red giant branch stars before they undergo the helium flash. With the advent of JWST, th
Externí odkaz:
http://arxiv.org/abs/2401.04776
Autor:
Li, Siyang, Riess, Adam G., Casertano, Stefano, Anand, Gagandeep S., Scolnic, Daniel M., Yuan, Wenlong, Breuval, Louise, Huang, Caroline D.
Publikováno v:
ApJ 966 20 2024
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 4 hosts of 6 Type Ia supernovae (SN Ia): NGC 1448, NGC 1559, NGC 5584, and NGC 5643. These clumps of stars
Externí odkaz:
http://arxiv.org/abs/2401.04777
Autor:
Riess, Adam G., Anand, Gagandeep S., Yuan, Wenlong, Macri, Lucas M., Casertano, Stefano, Dolphin, Andrew, Breuval, Louise, Scolnic, Dan, Perrin, Marshall, Anderson, Richard I.
We present high-definition observations with the James Webb Space Telescope of >1000 Cepheids in a geometric anchor of the distance ladder, NGC4258, and in 5 hosts of 8 SNe~Ia, a far greater sample than previous studies with JWST. These galaxies indi
Externí odkaz:
http://arxiv.org/abs/2401.04773
Autor:
Huang, Caroline D., Yuan, Wenlong, Riess, Adam G., Hack, Warren, Whitelock, Patricia A., Zakamska, Nadia L., Casertano, Stefano, Macri, Lucas M., Marengo, Massimo, Menzies, John W., Smith, Randall K.
Publikováno v:
The Astrophysical Journal, Volume 963, Issue 2, 2024, id.83, 17 pp.
The giant spiral galaxy M101 is host to the nearest recent Type Ia Supernova (SN 2011fe) and thus has been extensively monitored in the near-infrared to study the late-time lightcurve of the supernova. Leveraging this existing baseline of observation
Externí odkaz:
http://arxiv.org/abs/2312.08423
Autor:
Riess, Adam G., Anand, Gagandeep S., Yuan, Wenlong, Casertano, Stefano, Dolphin, Andrew, Macri, Lucas M., Breuval, Louise, Scolnic, Dan, Perrin, Marshall, Anderson, Richard I.
High-resolution JWST observations can test confusion-limited HST observations for a photometric bias that could affect extragalactic Cepheids and the determination of the Hubble constant. We present JWST NIRCAM observations in two epochs and three fi
Externí odkaz:
http://arxiv.org/abs/2307.15806
Autor:
Hounsell, Rebekah, Scolnic, Dan, Brout, Dillon, Rose, Benjamin, Fox, Ori, Sako, Masao, Macias, Phillip, Joshi, Bhavin, Desutua, Susana, Rubin, David, Casertano, Stefano, Perlmutter, Saul, Aldering, Greg, Mandel, Kaisey, Sosey, Megan, Suzuki, Nao, Ryan, Russell
We motivate the cosmological science case of measuring Type Ia supernovae with the Nancy Grace Roman Space Telescope as part of the High Latitude Time Domain Survey. We discuss previously stated requirements for the science, and a baseline survey str
Externí odkaz:
http://arxiv.org/abs/2307.02670
Autor:
Li, Siyang, Riess, Adam G., Scolnic, Dan, Anand, Gagandeep S., Wu, Jiaxi, Casertano, Stefano, Yuan, Wenlong, Beaton, Rachael, Anderson, Richard I.
Publikováno v:
ApJ 956 32 2023
The Tip of the Red Giant Branch provides a luminous standard candle for calibrating distance ladders that reach Type Ia supernova (SN Ia) hosts. However, recent work reveals that tip measurements vary at the $\sim$ 0.1 mag level for different stellar
Externí odkaz:
http://arxiv.org/abs/2306.10103