Zobrazeno 1 - 10
of 3 775
pro vyhledávání: '"Diaferio, A."'
Autor:
Pizzardo, Michele, Geller, Margaret J., Kenyon, Scott J., Damjanov, Ivana, Diaferio, Antonaldo
Publikováno v:
A&A 680, A48 (2023)
We use simulated cluster member galaxies from Illustris TNG300-1 to develop a technique for measuring the galaxy cluster mass accretion rate (MAR) that can be applied directly to observations. We analyze 1318 IllustrisTNG clusters of galaxies with $M
Externí odkaz:
http://arxiv.org/abs/2307.07398
We show how the star formation activity of galaxies is progressively inhibited from the outer region to the center of the massive cluster A2142. From an extended spectroscopic redshift survey of 2239 galaxies covering a circular area of radius $\sim
Externí odkaz:
http://arxiv.org/abs/2306.02550
Autor:
Pizzardo, Michele, Geller, Margaret J., Kenyon, Scott J., Damjanov, Ivana, Diaferio, Antonaldo
Publikováno v:
A&A 675, A56 (2023)
The TNG300-1 run of the IllustrisTNG simulations includes 1697 clusters of galaxies with $M_{200c}>10^{14}$M$_\odot$ covering the redshift range $0.01-1.04$. We build mock spectroscopic redshift catalogues of simulated galaxies within these clusters
Externí odkaz:
http://arxiv.org/abs/2303.18147
Publikováno v:
Monthly Notices of the Royal Astronomical Society, 519, 4424-4433 (2023)
We use the kinematic data of the stars in eight dwarf spheroidal galaxies to assess whether $f(R)$ gravity can fit the observed profiles of the line-of-sight velocity dispersion of these systems without resorting to dark matter. Our model assumes tha
Externí odkaz:
http://arxiv.org/abs/2210.02306
We show that measuring the proper motion of ${{\sim 2000}}$ stars within a dwarf galaxy, with an uncertainty of 1 km/s at most, can establish whether the Dark Matter (DM) density profile of the dwarf has a central core or cusp. We derive these limits
Externí odkaz:
http://arxiv.org/abs/2208.14110
We show that $\varsigma$, the radial location of the minimum in the differential radial mass profile $M^\prime(r)$ of a galaxy cluster, can probe the theory of gravity. We derived $M^\prime(r)$ of the dark matter halos of galaxy clusters from N-body
Externí odkaz:
http://arxiv.org/abs/2207.04982
Autor:
Logan, Crispin H. A., Maughan, Ben J., Diaferio, Antonaldo, Duffy, Ryan T., Geller, Margaret J., Rines, Kenneth, Sohn, Jubee
Publikováno v:
A&A 665, A124 (2022)
Clusters of galaxies are powerful probes with which to study cosmology and astrophysics. However, for many applications an accurate measurement of a cluster's mass is essential. A systematic underestimate of hydrostatic masses from X-ray observations
Externí odkaz:
http://arxiv.org/abs/2202.08569
We discuss a spectroscopic survey of the strong lensing cluster A1489 that includes redshifts for 195 cluster members along with central velocity dispersions for 188 cluster members. The caustic technique applied to the redshift survey gives the dyna
Externí odkaz:
http://arxiv.org/abs/2201.00993
Autor:
Gallo, Arianna, Ostorero, Luisa, Chakrabarty, Sankha Subhra, Ebagezio, Stefano, Diaferio, Antonaldo
Publikováno v:
A&A 663, A72 (2022)
We propose a new method to determine the shape of the gravitational potential of the dark matter (DM) halo of the Milky Way (MW) with the galactocentric tangential velocities of a sample of hypervelocity stars (HVSs). We compute the trajectories of d
Externí odkaz:
http://arxiv.org/abs/2111.09657
Autor:
Malbet, Fabien, Boehm, Céline, Krone-Martins, Alberto, Amorim, Antonio, Anglada-Escudé, Guillem, Brandeker, Alexis, Courbin, Frédéric, Enßlin, Torsten, Falcão, Antonio, Freese, Katherine, Holl, Berry, Labadie, Lucas, Léger, Alain, Mamon, Gary, Mcarthur, Barbara, Mora, Alcione, Shao, Mike, Sozzetti, Alessandro, Spolyar, Douglas, Villaver, Eva, Abbas, Ummi, Albertus, Conrado, Alves, João, Barnes, Rory, Bonomo, Aldo Stefano, Bouy, Hervé, Brown, Warren, Cardoso, Vitor, Castellani, Marco, Chemin, Laurent, Clark, Hamish, Correia, Alexandre, Crosta, Mariateresa, Crouzier, Antoine, Damasso, Mario, Darling, Jeremy, Davies, Melvyn, Diaferio, Antonaldo, Fortin, Morgane, Fridlund, Malcolm, Gai, Mario, Garcia, Paulo, Gnedin, Oleg, Goobar, Ariel, Gordo, Paulo, Goullioud, Renaud, Hall, David, Hambly, Nigel, Harrison, Diana, Hobbs, David, Holland, Andrew, Høg, Erik, Jordi, Carme, Klioner, Sergei, Lançon, Ariane, Laskar, Jacques, Lattanzi, Mario, Poncin-Lafitte, Christophe Le, Luri, Xavier, Michalik, Daniel, de Almeida, André Moitinho, Mourão, Ana, Moustakas, Leonidas, Murray, Neil, Muterspaugh, Matthew, Oertel, Micaela, Ostorero, Luisa, Portell, Jordi, Prost, Jean-Pierre, Quirrenbach, Andreas, Schneider, Jean, Scott, Pat, Siebert, Arnaud, Da Silva, Antonio, Silva, Manuel, Thébault, Philippe, Tomsick, John, Traub, Wesley, de Val-Borro, Miguel, Valluri, Monica, Walton, Nicholas, Watkins, Laura, White, Glenn, Wyrzykowski, Lukasz, Wyse, Rosemary, Yamada, Yoshiyuki
Publikováno v:
Experimental Astronomy, Springer Link, 2021, 51 (3), pp.845-886
Sky survey telescopes and powerful targeted telescopes play complementary roles in astronomy. In order to investigate the nature and characteristics of the motions of very faint objects, a flexibly-pointed instrument capable of high astrometric accur
Externí odkaz:
http://arxiv.org/abs/2111.08709