scholarly journals Late-time evolution of realistic rotating collapse and the no-hair theorem

1998 ◽  
Vol 58 (10) ◽  
Author(s):  
Shahar Hod
Keyword(s):  
Time Evolution ◽  
Late Time

scholarly journals Formation, vertex deviation, and age of the Milky Way’s bulge: input from a cosmological simulation with a late-forming bar

2019 ◽  
Vol 485 (4) ◽  
pp. 5073-5085 ◽  
Author(s):  
Victor P Debattista ◽  
Oscar A Gonzalez ◽  
Robyn E Sanderson ◽  
Kareem El-Badry ◽  
Shea Garrison-Kimmel ◽  
...  
Keyword(s):  
Time Evolution ◽  
Milky Way ◽  
Late Time ◽  
High Latitudes ◽  
Older Populations

Abstract We present the late-time evolution of m12m, a cosmological simulation of a Milky Way-like galaxy from the FIRE project. The simulation forms a bar after redshift z = 0.2. We show that the evolution of the model exhibits behaviours typical of kinematic fractionation, with a bar weaker in older populations, an X-shape traced by the younger, metal-rich populations, and a prominent X-shape in the edge-on mean metallicity map. Because of the late formation of the bar in m12m, stars forming after $10\mbox{$\:{\rm Gyr}$}$ (z = 0.34) significantly contaminate the bulge, at a level higher than is observed at high latitudes in the Milky Way, implying that its bar cannot have formed as late as in m12m. We also study the model’s vertex deviation of the velocity ellipsoid as a function of stellar metallicity and age in the equivalent of Baade’s Window. The formation of the bar leads to a non-zero vertex deviation. We find that metal-rich stars have a large vertex deviation (∼40°), which becomes negligible for metal-poor stars, a trend also found in the Milky Way, despite not matching in detail. We demonstrate that the vertex deviation also varies with stellar age and is large for stars as old as $9 \mbox{$\:{\rm Gyr}$}$, while $13\mbox{$\:{\rm Gyr}$}$ old stars have negligible vertex deviation. When we exclude stars that have been accreted, the vertex deviation is not significantly changed, demonstrating that the observed variation of vertex deviation with metallicity is not necessarily due to an accreted population.

scholarly journals Late time evolution of a nonminimally coupled scalar field system

2019 ◽  
Vol 51 (9) ◽  
Author(s):  
M. Shahalam ◽  
R. Myrzakulov ◽  
Maxim Yu. Khlopov
Keyword(s):  
Scalar Field ◽  
Time Evolution ◽  
Late Time ◽  
Field System

scholarly journals Late time evolution of negatively curved FLRW models

2020 ◽  
Vol 135 (4) ◽  
Author(s):  
Roberto Giambò ◽  
John Miritzis ◽  
Annagiulia Pezzola
Keyword(s):  
Time Evolution ◽  
Late Time ◽  
Negatively Curved

Late-time evolution of massive Dirac fields in the Kerr background

2006 ◽  
Vol 15 (12) ◽  
pp. 2850-2855 ◽  
Author(s):  
He Xi ◽  
Jing Ji-Liang
Keyword(s):  
Time Evolution ◽  
Late Time ◽  
Dirac Fields

scholarly journals The unusual late-time evolution of the tidal disruption event ASASSN-15oi

2018 ◽  
Vol 480 (4) ◽  
pp. 5689-5703 ◽  
Author(s):  
T W-S Holoien ◽  
J S Brown ◽  
K Auchettl ◽  
C S Kochanek ◽  
J L Prieto ◽  
...  
Keyword(s):  
Time Evolution ◽  
Late Time ◽  
Tidal Disruption ◽  
Disruption Event
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