Zobrazeno 1 - 10
of 162
pro vyhledávání: '"galaxy rotation curves"'
Publikováno v:
The Astrophysical Journal Letters, Vol 969, Iss 1, p L3 (2024)
We use a new deprojection formula to infer the gravitational potential around isolated galaxies from weak gravitational lensing. The results imply circular velocity curves that remain flat for hundreds of kiloparsecs, greatly extending the classic re
Externí odkaz:
https://doaj.org/article/e1474cbd08244a7584bf479b06147b6e
Autor:
Robin Booth
Publikováno v:
Galaxies, Vol 12, Iss 3, p 21 (2024)
We examine some of the consequences of the Exochronous (timeless) metric and the associated ΣGR cosmological model for the formation of galaxies, and, in particular, their characteristic rotation curves. We show how the cumulative curvature from the
Externí odkaz:
https://doaj.org/article/2722d93e0e8547cd8017d5d02dfabb18
Autor:
Lincoln, Don, author
Publikováno v:
Einstein's Unfinished Dream : Practical Progress Towards a Theory of Everything, 2023, ill.
Externí odkaz:
https://doi.org/10.1093/oso/9780197638033.003.0004
Autor:
Bruce Hoeneisen
Publikováno v:
ACI Avances en Ciencias e Ingenierías, Vol 15, Iss 1 (2023)
A data driven solution to the dark matter problem is presented. This short and self-contained overview is intended for a wide audience, with full technical details available in the cited references. We present redundant, independent and consistent me
Externí odkaz:
https://doaj.org/article/b6417a0571cb4cfd8462ce9aca34a4d3
Autor:
Brian DiGiorgio Zanger, Kyle B. Westfall, Kevin Bundy, Niv Drory, Matthew A. Bershady, Stephanie Campbell, Anne-Marie Weijmans, Karen L. Masters, David Stark, David Law
Publikováno v:
The Astrophysical Journal, Vol 973, Iss 2, p 116 (2024)
The Sloan Digital Sky Survey-IV/Mapping Nearby Galaxies at Apache Point Observatory (MaNGA) Survey data provide an unprecedented opportunity to study the internal motions of galaxies and, in particular, represent the largest sample of barred galaxy k
Externí odkaz:
https://doaj.org/article/d6a73a010d6c470780aba99c24b7912f
Publikováno v:
The Astrophysical Journal, Vol 972, Iss 1, p 23 (2024)
The universal rotation curve (URC) of disk galaxies was originally proposed to predict the shape and amplitude of any rotation curve (RC) based solely on photometric data. Here, the URC is investigated with an extensive set of spatially resolved RCs
Externí odkaz:
https://doaj.org/article/9da13fc4ac1c420396bdfa31652890eb
Publikováno v:
The Astrophysical Journal, Vol 970, Iss 2, p 186 (2024)
Low-surface-brightness galaxies are excellent laboratories, where stars and baryonic matter act as tracers of the gravitational potential of the dark matter halo. If dark matter is modeled as a perfect fluid, then spherically symmetric and static dar
Externí odkaz:
https://doaj.org/article/385751ff570147a9963398d2a2171cae
Publikováno v:
The Astrophysical Journal, Vol 967, Iss 2, p 135 (2024)
We present a study of the ratio of visible mass to total mass in spiral galaxies to better understand the relative amount of dark matter present in galaxies of different masses and evolutionary stages. Using the velocities of the H α emission line m
Externí odkaz:
https://doaj.org/article/fbc9c545e1494f86ad100f0ed8bc2dc5
Autor:
Jiang-Tao Li, Li-Yuan Lu, Zhijie Qu, Robert A. Benjamin, Joel N. Bregman, Ralf-Jürgen Dettmar, Jayanne English, Taotao Fang, Judith A. Irwin, Yan Jiang, Hui Li, Guilin Liu, Paul Martini, Richard J. Rand, Yelena Stein, Andrew W. Strong, Carlos J. Vargas, Q. Daniel Wang, Jing Wang, Theresa Wiegert, Jianghui Xu, Yang Yang
Publikováno v:
The Astrophysical Journal, Vol 967, Iss 2, p 78 (2024)
The extraplanar diffuse ionized gas (eDIG) represents ionized gases traced by optical/UV lines beyond the stellar extent of galaxies. We herein introduce a novel multislit narrow-band spectroscopy method to conduct spatially resolved spectroscopy of
Externí odkaz:
https://doaj.org/article/dbbc0a9f0de6428f95552c808aadfb2a
Publikováno v:
The Astrophysical Journal, Vol 965, Iss 2, p 132 (2024)
Classical Cepheids (CCs) are excellent tracers for understanding the structure of the Milky Way disk. The latest Gaia Data Release 3 provides a large number of line-of-sight velocity information for Galactic CCs, offering an opportunity for studying
Externí odkaz:
https://doaj.org/article/8f7d89eaf4e042b18c6bad030f134442