Results 51 to 60 of about 957 (185)

The Strength of Bisymmetric Modes in SDSS-IV/MaNGA Barred Galaxy Kinematics

The Astrophysical Journal
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 ...
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   +9 more
doaj   +1 more source

The Circular Velocity Curve of the Milky Way from 5–25 kpc Using Luminous Red Giant Branch Stars

The Astrophysical Journal, 2023
We present a sample of 254,882 luminous red giant branch (LRGB) stars selected from the APOGEE and LAMOST surveys. By combining photometric and astrometric information from the Two Micron All Sky Survey and Gaia survey, the precise distances of the ...
Yuan Zhou, Xinyi Li, Yang Huang, Huawei Zhang   +3 more
doaj   +1 more source

The Discrepancy in Galaxy Rotation Curves

, 2019
In this work we try a new approach for dealing with the discrepancy between observed galaxy rotation curves and theoretical predictions. This new approach does not involve any changes in the current fundamental laws of nature or the addition of dark halos.
Roy Gomel, Tomer Zimmerman
openaire   +2 more sources

Women in space: A review of known physiological adaptations and health perspectives

Experimental Physiology, EarlyView.
Abstract Exposure to the spaceflight environment causes adaptations in most human physiological systems, many of which are thought to affect women differently from men. Since only 11.5% of astronauts worldwide have been female, these issues are largely understudied.
Millie Hughes‐Fulford, Danielle J. Carroll, Heather C. M. Allaway, Bonnie J. Dunbar, Aenor J. Sawyer   +4 more
wiley   +1 more source

The Supersonic Project: The Eccentricity and Rotational Support of SIGOs and DM GHOSts

The Astrophysical Journal, 2023
A supersonic relative velocity between dark matter (DM) and baryons (the stream velocity) at the time of recombination induces the formation of low-mass objects with anomalous properties in the early universe.
Claire E. Williams, Smadar Naoz, William Lake, Yeou S. Chiou, Blakesley Burkhart, Federico Marinacci, Mark Vogelsberger, Gen Chiaki, Yurina Nakazato, Naoki Yoshida   +9 more
doaj   +1 more source

Galaxy rotation curves in the Grumiller's modified gravity [PDF]

Monthly Notices of the Royal Astronomical Society, 2013
The effective potential in the Grumiller's modified gravity [D. Grumiller, Phys. Rev. Lett {\bf 105}, 211303 (2010)] includes the Newtonian potential and a Rindler term. The fitting to the rotation curve data of eight galaxies suggests a universal Rindler acceleration $a\approx 0.30\times 10^{-10}$ m s$^{-2}$.
Lin, Hai-Nan, Li, Ming-Hua, Li, Xin, Chang, Zhe   +3 more
openaire   +2 more sources

50% body weight loading reduces stature increases and lumbar disc expansion from 4 h hyper‐buoyancy floatation versus 15 min sitting upright

Experimental Physiology, EarlyView.
Abstract Microgravity is associated with stature increases, back pain and post‐flight intervertebral disc (IVD) herniation. This study aims to determine whether 30 s seated 50% body weight (BW) axial loading is comparable to 15 min sitting upright in 1 g upon changes in stature, anterior lumbar IVD height (via ultrasound), passive vertebral stiffness ...
David Marcos‐Lorenzo, Christina Lysandrou, Laura Sudres, Alfonso Gil‐Martinez, Jaap Swanenburg, James Edward Clark, David Andrew Green   +6 more
wiley   +1 more source

Breaking the Degeneracy between Warps and Radial Flows in External Galaxies

The Astrophysical Journal
Observations of the line-of-sight (LOS) component of emitter velocities in galaxies are valuable for reconstructing their two-dimensional (2D) velocity fields, albeit requiring certain assumptions.
Francesco Sylos Labini, Giordano De Marzo, Matteo Straccamore   +2 more
doaj   +1 more source

PROBES. I. A Compendium of Deep Rotation Curves and Matched Multiband Photometry

The Astrophysical Journal Supplement Series, 2022
We present the Photometry and Rotation Curve Observations from Extragalactic Surveys (PROBES) compendium of extended rotation curves for 3163 late-type spirals, with matching homogeneous multiband photometry for 1677 of them.
Connor Stone, Stéphane Courteau, Nikhil Arora, Matthew Frosst, Thomas H. Jarrett   +4 more
doaj   +1 more source

A Symmetric Ring Galaxy Model Explains the Rotation Curve of Galaxies

Applied Physics Research, 2023
This paper proposes a symmetric ring galaxy (SRG) model based on the general structure of galaxies. Based on this model, we have obtained results that are consistent with the actual observation results of the galaxy rotation curve, thus solving the problem of inconsistency between the observation results of the galaxy rotation curve and the expected ...
openaire   +2 more sources