high-velocity cloud
(HVC)
(fast-moving clouds in galactic halos)
A high-velocity cloud is
a gas cloud within a galactic halo moving
at a high velocity, e.g., local standard of rest velocities in or beyond the 70-90 km/s range
and with masses ranging up to millions of solar masses.
They're largely observed within the Milky Way
(such as the Magellanic Stream and the Smith Cloud)
and in other nearby galaxies.
The term intermediate-velocity cloud (IVC) is also used
for similar clouds with significant motion but
somewhat lower velocity. LVC, for low-velocity cloud,
generally meaning no more than 35 km/s.
(cloud type,halo)
Further reading:
https://en.wikipedia.org/wiki/High-velocity_cloud
https://astronomy.swin.edu.au/cosmos/h/high+velocity+cloud
https://www.daviddarling.info/encyclopedia/H/high-velocity_cloud.html
https://ui.adsabs.harvard.edu/abs/2012MNRAS.424.2896L/abstract
https://ui.adsabs.harvard.edu/abs/1999ApJ...514..818B/abstract
https://ui.adsabs.harvard.edu/abs/1997ARA%26A..35..217W/abstract
Prefix | Example | | |
HVC | HVC 125+41-207 | general HVC prefix | |
IVC | IVC 86-36 | intermediate velocity cloud | |
LVC | LVC 127 127+20-3 | low velocity cloud | |
|
Referenced by pages:
cloud
galactic halo
Magellanic Stream
Smith Cloud
supershell
Index