 |
| Previous Image | Next Image |
| Description: The Period-Luminosity Relation The period of a Cepheid variable is directly related to its average luminosity: The more luminous the Cepheid, the longer its period and the slower its pulsations. Type I Cepheids (δ Cephei stars) are brighter, more massive, and more metal-rich stars than Type II Cepheids. The greater brightness of the Type I Cepheids is a result of their higher mass Picture Stats: Views: 727 Filesize: 139.23kB Height: 900 Width: 980 Source: https://biology-forums.com/index.php?action=gallery;sa=view;id=18433 |