Zobrazeno 1 - 10
of 233
pro vyhledávání: '"SAÏD, Khaled"'
Autor:
Scolnic, Daniel, Riess, Adam G., Murakami, Yukei S., Peterson, Erik R., Brout, Dillon, Acevedo, Maria, Carreres, Bastien, Jones, David O., Said, Khaled, Howlett, Cullan, Anand, Gagandeep S.
The Dark Energy Spectroscopic Instrument (DESI) collaboration measured a tight relation between the Hubble constant ($H_0$) and the distance to the Coma cluster using the fundamental plane (FP) relation of the deepest, most homogeneous sample of earl
Externí odkaz:
http://arxiv.org/abs/2409.14546
Autor:
Peterson, Erik R., Carreres, Bastien, Carr, Anthony, Scolnic, Daniel, Bailey, Ava, Davis, Tamara M., Brout, Dillon, Howlett, Cullan, Jones, David O., Riess, Adam G., Said, Khaled, Taylor, Georgie
At the low-redshift end ($z<0.05$) of the Hubble diagram with Type Ia Supernovae (SNe Ia), the contribution to Hubble residual scatter from peculiar velocities is of similar size to that due to the standardization of the SN Ia light curve. A way to i
Externí odkaz:
http://arxiv.org/abs/2408.14560
Autor:
Said, Khaled, Howlett, Cullan, Davis, Tamara, Lucey, John, Saulder, Christoph, Douglass, Kelly, Kim, Alex G., Kremin, Anthony, Ross, Caitlin, Aldering, Greg, Aguilar, Jessica Nicole, Ahlen, Steven, BenZvi, Segev, Bianchi, Davide, Brooks, David, Claybaugh, Todd, Dawson, Kyle, de la Macorra, Axel, Dey, Biprateep, Doel, Peter, Fanning, Kevin, Ferraro, Simone, Font-Ribera, Andreu, Forero-Romero, Jaime E., Gaztañaga, Enrique, Gontcho, Satya Gontcho A, Guy, Julien, Honscheid, Klaus, Kehoe, Robert, Kisner, Theodore, Lambert, Andrew, Landriau, Martin, Guillou, Laurent Le, Manera, Marc, Meisner, Aaron, Miquel, Ramon, Moustakas, John, Muñoz-Gutiérrez, Andrea, Myers, Adam, Nie, Jundan, Palanque-Delabrouille, Nathalie, Percival, Will, Prada, Francisco, Rossi, Graziano, Sanchez, Eusebio, Schlegel, David, Schubnell, Michael, Silber, Joseph Harry, Sprayberry, David, Tarlé, Gregory, Magana, Mariana Vargas, Weaver, Benjamin Alan, Wechsler, Risa, Zhou, Zhimin, Zou, Hu
The Dark Energy Spectroscopic Instrument (DESI) Peculiar Velocity Survey aims to measure the peculiar velocities of early and late type galaxies within the DESI footprint using both the Fundamental Plane and Tully-Fisher relations. Direct measurement
Externí odkaz:
http://arxiv.org/abs/2408.13842
We propose an improved comprehensive method for determining the Hubble constant ($H_0$) using the Tully-Fisher relation. By fitting a peculiar velocity model in conjunction with the Tully-Fisher relation, all available data can be used to derive self
Externí odkaz:
http://arxiv.org/abs/2408.03660
Autor:
D'Eugenio, Francesco, Colless, Matthew, van der Wel, Arjen, Vaughan, Sam P., Said, Khaled, van de Sande, Jesse, Bland-Hawthorn, Joss, Bryant, Julia J., Croom, Scott M., Lopez-Sanchez, Angel R., Lorente, Nuria P. F., Maiolino, Roberto, Taylor, Edward N.
We use deep spectroscopy from the SAMI Galaxy Survey to explore the precision of the fundamental plane of early-type galaxies (FP) as a distance indicator for future single-fibre spectroscopy surveys. We study the optimal trade-off between sample siz
Externí odkaz:
http://arxiv.org/abs/2406.17842
Autor:
Dogruel, M. Burak, Taylor, Edward, Cluver, Michelle, Colless, Matthew, de Graaff, Anna, Sonnenfeld, Alessandro, Lucey, John R., D'Eugenio, Francesco, Howlett, Cullan, Said, Khaled
Empirical correlations connecting starlight to galaxy dynamics (e.g., the fundamental plane (FP) of elliptical/quiescent galaxies and the Tully--Fisher relation of spiral/star-forming galaxies) provide cosmology-independent distance estimation and ar
Externí odkaz:
http://arxiv.org/abs/2405.10866
Autor:
Said, Khaled
The observed radial velocity of a galaxy consists of two main components: the recession velocity caused by the smooth Hubble expansion and the peculiar velocity resulting from the gravitational attraction of growing structures due to matter density f
Externí odkaz:
http://arxiv.org/abs/2310.16053
Autor:
Saulder, Christoph, Howlett, Cullan, Douglass, Kelly A., Said, Khaled, BenZvi, Segev, Ahlen, Steven, Aldering, Greg, Bailey, Stephen, Brooks, David, Davis, Tamara, de la Macorra, Axel, Dey, Arjun, Font-Ribera, Andreu, Forero-Romero, Jaime E., Gontcho, Satya Gontcho A, Honscheid, Klaus, Kim, Alex G., Kisner, Theodore, Kremin, Anthony, Landriau, Martin, Levi, Michael E., Lucey, John, Meisner, Aaron M., Miquel, Ramon, Moustakas, John, Myers, Adam D., Palanque-Delabrouille, Nathalie, Percival, Will, Poppett, Claire, Prada, Francisco, Qin, Fei, Schubnell, Michael, Tarlé, Gregory, Magaña, Mariana Vargas, Weaver, Benjamin Alan, Zhou, Rongpu, Zhou, Zhimin, Zou, Hu
We describe the target selection and characteristics of the DESI Peculiar Velocity Survey, the largest survey of peculiar velocities (PVs) using both the fundamental plane (FP) and the Tully-Fisher (TF) relationship planned to date. We detail how we
Externí odkaz:
http://arxiv.org/abs/2302.13760
Peculiar velocities are an important probe of the mass distribution in the Universe and the growth rate of structure, directly measuring the effects of gravity on the largest scales and providing a test for theories of gravity. Comparing peculiar vel
Externí odkaz:
http://arxiv.org/abs/2301.12648
Autor:
Giani, Leonardo, Howlett, Cullan, Ruggeri, Rossana, Bianchini, Federico, Said, Khaled, Davis, Tamara M.
We study, for the first time, the cross correlation between the angular distribution of radial peculiar velocities (PV) and the lensing convergence of cosmic microwave background (CMB) photons. We derive theoretical expectations for the signal and it
Externí odkaz:
http://arxiv.org/abs/2301.08381