All Questions
Tagged with velocity galactic-dynamics
4
questions
4
votes
1
answer
451
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What does "unremarkable transverse peculiar velocity" mean exactly, and how is it calculated here?
The abstract of A magnetar parallax (also in MNRAS) contains the following:
Combining our new observations with two archival observations from 2006, we have refined the proper motion and reference ...
- 30.7k
2
votes
1
answer
175
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Why does the neutral hydrogen velocity have this characteristic behavior in the galactic plane?
The recently released map of galactic neutral hydrogen density and velocity is really beautiful. The work has been relased by the HI4PI collaboration (HI = neutral hydrogen, $4\pi$ = complete ...
- 30.7k
10
votes
2
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What (actually) is the " deprojected half-light radius" of this almost-all-dark-matter Galaxy?
The recent news of the Ultra Diffuse Galaxy (UDG) Dragonfly 44 is an excellent example of what could be termed 'observe different' thinking. The dragonfly telescope is noted not for the size of its ...
- 30.7k
3
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1
answer
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What is $v_{GSR}$
In this paper ("The Apache Point Observatory Galactic Evolution Experiment: First Detection of High Velocity Milky Way Bar Stars") they plot and calculate $v_{GSR}$. $GSR$ stands for Galactic Standard ...
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