Open main menu
Home
Random
Recent changes
Special pages
Community portal
Preferences
About Wikipedia
Disclaimers
Incubator escapee wiki
Search
User menu
Talk
Dark mode
Contributions
Create account
Log in
Editing
Variable star
(section)
Warning:
You are not logged in. Your IP address will be publicly visible if you make any edits. If you
log in
or
create an account
, your edits will be attributed to your username, along with other benefits.
Anti-spam check. Do
not
fill this in!
=====RR Lyrae variables===== {{Main|RR Lyrae variable}} These stars are somewhat similar to Cepheids, but are not as luminous and have shorter periods. They are older than type I Cepheids, belonging to [[Population II]], but of lower mass than type II Cepheids. Due to their common occurrence in [[globular cluster]]s, they are occasionally referred to as ''cluster Cepheids''. They also have a well established period-luminosity relationship, and so are also useful as distance indicators. These A-type stars vary by about 0.2β2 magnitudes (20% to over 500% change in luminosity) over a period of several hours to a day or more.
Edit summary
(Briefly describe your changes)
By publishing changes, you agree to the
Terms of Use
, and you irrevocably agree to release your contribution under the
CC BY-SA 4.0 License
and the
GFDL
. You agree that a hyperlink or URL is sufficient attribution under the Creative Commons license.
Cancel
Editing help
(opens in new window)