Results 61 to 70 of about 51,405 (265)

The universal galaxy rotation curve

The Astrophysical Journal, 1991
From the analysis of an extended set of selected galaxy rotation curves, it is found that for a given luminosity the rotation curves of spiral galaxies within the optical radius are a universal function. This result implies strong systematic variations of both the amplitude and the profil of the circular velocity with luminosity faint (bright) galaxies
Persic, M., Salucci, P.
openaire   +2 more sources

A Large-scale Kinematic Study of Molecular Gas in High-z Cluster Galaxies: Evidence for High Levels of Kinematic Asymmetry

The Astrophysical Journal, 2023
We investigate the resolved kinematics of the molecular gas, as traced by the Atacama Large Millimeter/submillimeter Array in CO (2−1), of 25 cluster member galaxies across three different clusters at a redshift of z ∼ 1.6.
W. J. Cramer, A. G. Noble, K. Massingill, J. Cairns, D. L. Clements, M. C. Cooper, R. Demarco, J. Matharu, M. McDonald, A. Muzzin, J. Nantais, G. Rudnick, H. Übler, E. van Kampen, T. M. A. Webb, G. Wilson, H. K. C. Yee   +16 more
doaj   +1 more source

Galactic Evolution Showing a Constant Circulating Speed of Stars in a Galactic Disc without Requiring Dark Matter

Reports in Advances of Physical Sciences, 2020
It is an unsolved mystery that the rotation velocity of a galactic disc is same at any radial distances. The presence of dark matter is expected, but not observed.
Shigeto Nagao
doaj   +1 more source

Halpha Kinematics of S4G Spiral Galaxies - III. Inner rotation curves [PDF]

, 2016
We present a detailed study of the shape of the innermost part of the rotation curves of a sample of 29 nearby spiral galaxies, based on high angular and spectral resolution kinematic Halpha Fabry-Perot observations.
Athanassoula, E., Bosma, Albert, Comeron, Sebastien, Dıaz-Garcia, Simon, Elmegreen, Bruce G., Erroz-Ferrer, Santiago, Knapen, Johan H., Laurikainen, Eija, Leaman, Ryan, Martınez-Valpuesta, Inma, Muñoz-Mateos, Juan Carlos, Querejeta, Miguel, Salo, Heikki   +12 more
core   +3 more sources

The Nearly Universal Disk Galaxy Rotation Curve

The Astrophysical Journal
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.
Raj Patel, Nikhil Arora, Stéphane Courteau, Connor Stone, Matthew Frosst, Lawrence Widrow   +5 more
doaj   +1 more source

Mass Models of the Milky Way and Estimation of Its Mass from the Gaia DR3 Data Set

The Astrophysical Journal, 2023
We use data from the Gaia DR3 data set to estimate the mass of the Milky Way (MW) by analyzing the rotation curve in the range of distances 5 to 28 kpc. We consider three mass models: The first model adds a spherical dark matter (DM) halo, following the ...
Francesco Sylos Labini, Žofia Chrobáková, Roberto Capuzzo-Dolcetta, Martín López-Corredoira   +3 more
doaj   +1 more source

Galaxy rotation curves with lognormal density distribution [PDF]

Monthly Notices of the Royal Astronomical Society, 2015
Accepted for publication by MNRAS January 30 ...
openaire   +2 more sources

A Proof‐of‐Concept Assessment of a Novel Wearable Eyelid Muscle Device: A Pre‐Clinical Animal Cadaver Study for Eyelid Closure Restoration

Advanced Robotics Research, EarlyView.
This article introduces a soft wearable eyelid sling device incorporating a hydraulic soft artificial muscle (SAM) for achieving complete closure of an eyelid. The SAM is driven by a cam mechanism that provides a displacement profile closely matched with those of a healthy eyelid.
Patrick Pruscino, Phuoc Thien Phan, James Davies, Bibhu Sharma, Tianruo Guo, Chi Cong Nguyen, Nigel H. Lovell, Thanh Nho Do   +7 more
wiley   +1 more source

Large-Scale Asymmetry of Rotation Curves in Lopsided Spiral Galaxies [PDF]

, 2002
Many spiral galaxies show a large-scale asymmetry with a cos\phi dependence in their rotation curves as well as in their morphology, such as M101 and NGC 628.
Jog, Chanda J.
core   +4 more sources

Long‐Term Elevated CO2 Improves Soil Health and Rice Yields in Paddy Fields

Advanced Science, EarlyView.
Combining the two longest‐running rice free‐air CO2 enrichment experiments with a global data synthesis, this study demonstrates that long‐term elevated CO2 consistently enhances soil health. In rice paddies, this improvement sustains the CO2 fertilization effect over decades.
Fan Jiang, Wenchao Du, Kees Jan van Groenigen, Josep Peñuelas, Scott X. Chang, Lian Song, Chuang Cai, Yu Wang, Lin Deng, Zhengkun Hu, Weishou Shen, Qicong Wu, Haiyang Yu, Ying Yin, Fuxun Ai, Wei Zhou, Dongming Wang, Jianqiang Sun, Xiaoyuan Yan, Renfang Shen, Jiabao Zhang, Hongyan Guo, Chunwu Zhu   +22 more
wiley   +1 more source