Zobrazeno 1 - 10
of 324
pro vyhledávání: '"Margaret J. Geller"'
Publikováno v:
The Astrophysical Journal, Vol 964, Iss 2, p 178 (2024)
We examine the central stellar velocity dispersion of subhalos based on IllustrisTNG cosmological hydrodynamic simulations. The central velocity dispersion is a fundamental observable that links galaxies with their dark matter subhalos. We carefully
Externí odkaz:
https://doaj.org/article/8e09f7f6c5744b65bed5db2595430d54
Publikováno v:
The Astrophysical Journal, Vol 943, Iss 2, p 149 (2023)
The HectoMAP survey provides a complete, mass-limited sample of 30,231 quiescent galaxies with i -band Hyper Suprime-Cam Subaru Strategic Program (HSC SSP) imaging that spans the redshift range 0.2 < z < 0.6. We combine half-light radii based on HSC
Externí odkaz:
https://doaj.org/article/b024d0da35a0472f897c67b836640936
Autor:
Jubee Sohn, Margaret J. Geller, Ho Seong Hwang, Daniel G. Fabricant, Yousuke Utsumi, Ivana Damjanov
Publikováno v:
The Astrophysical Journal, Vol 945, Iss 2, p 94 (2023)
HectoMAP is a dense redshift survey of 95,403 galaxies based primarily on MMT spectroscopy with a median redshift z = 0.345. The survey covers 54.64 deg ^2 in a 1.°5 wide strip across the northern sky centered at a decl. of 43.°25. We report the re
Externí odkaz:
https://doaj.org/article/91559bfcbcbe4458981c98a45b41f432
We measure the anisotropy of the Milky Way stellar halo traced by a dense sample of 18
Comment: 3 pages, 1 figure, accepted to Research Notes of the AAS
Comment: 3 pages, 1 figure, accepted to Research Notes of the AAS
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0d50d32cc70819465c34b3fe30761ad3
http://arxiv.org/abs/2205.09755
http://arxiv.org/abs/2205.09755
We use the IllustrisTNG simulations to explore the dynamic scaling relation between massive clusters and their central galaxies (BCGs). The Illustris TNG300-1 simulation we use includes 280 massive clusters with $M_{200} > 10^{14}$ M$_{\odot}$ enabli
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::082f336026dd0ea18d68c20fea7a23f6
http://arxiv.org/abs/2201.08853
http://arxiv.org/abs/2201.08853
The HectoMAP survey provides a complete, mass-limited sample of 30,231 quiescent galaxies with $i-$band Hyper Suprime-Cam Subaru Strategic Program (HSC SSP) imaging that spans the redshift range $0.2
Comment: 25 pages, 13 figures, submitted to t
Comment: 25 pages, 13 figures, submitted to t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bfb5f8ed514bb8d3b21bf2e9733fec05
Autor:
Crispin H. A. Logan, Ben J. Maughan, Antonaldo Diaferio, Ryan T. Duffy, Margaret J. Geller, Kenneth Rines, Jubee Sohn
Publikováno v:
Logan, C H A, Maughan, B J, Diaferio, A, Duffy, R T, Geller, M J, Rines, K & Sohn, J 2022, ' Chandra follow-up of the Hectospec Cluster Survey : Comparison of caustic and hydrostatic masses and constraints on the hydrostatic bias ', Astronomy and Astrophysics, vol. 665, A124 . https://doi.org/10.1051/0004-6361/202243347
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:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ba9f3c25ed6d10237724eeb14f3f3134
https://hdl.handle.net/2318/1890593
https://hdl.handle.net/2318/1890593
Publikováno v:
The Astrophysical Journal. 938:3
We explore the redshift evolution of the dynamical properties of massive clusters and their brightest cluster galaxies (BCGs) at $z < 2$ based on the IllustrisTNG-300 simulation. We select 270 massive clusters with $M_{200} < 10^{14}~{\rm M}_{\odot}$
Publikováno v:
The Astrophysical Journal. 929:61
We use surveys covering the redshift range $0.05 < z < 3.8$ to explore quiescent galaxy scaling relations and the redshift evolution of the velocity dispersion, size, and dynamical mass at fixed stellar mass. For redshift $z < 0.6$ we derive mass lim
Autor:
J. Sohn, Ana Laura Serra, Margaret J. Geller, C. De Boni, Antonaldo Diaferio, Marco Baldi, M. Pizzardo, S. Di Gioia, Kenneth J. Rines
We use a new spherical accretion recipe tested on N-body simulations to measure the observed mass accretion rate (MAR) of 129 clusters in the Cluster Infall Regions in the Sloan Digital Sky Survey (CIRS) and in the Hectospec Cluster Survey (HeCS). Th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b85a0cdcd52fe5b29678d1807414618b
http://hdl.handle.net/11585/804407
http://hdl.handle.net/11585/804407