|
| | | | |
| | | |
| Stat |
Members: 3645
Articles: 2'504'928
Articles rated: 2609
26 April 2024 |
|
| | | | |
|
Article overview
| |
|
|
On the Enhancement of Mass Loss in Cepheids Due to Radial Pulsation. II. The Effect of Metallicity | | Hilding R. Neilson
; John B. Lester
; | | Date: |
16 Sep 2008 | | Abstract: | It has been observed that Cepheids in the Magellanic Clouds have lower masses
for the same luminosity than those in the Milky Way. The model, from Neilson &
Lester (2008), of pulsation-driven mass loss for Cepheids is applied to
theoretical models of Cepheids with metallicity consistent with the Milky Way
and Large and Small Magellanic Clouds. The mass-loss model is analyzed using
the metallicity correction of the Period-Luminosity relation to compare the
ratio of mass loss of Cepheids with lower metallicity to that of Cepheids with
solar metallicity. It is determined that mass loss may be larger for the lower
metallicity Cepheids, counterintuitive to radiative driving estimates. Also the
mass-loss rates of theoretical Cepheid models are found to be up to $5 imes
10^{-9}$ for Galactic Cepheids, $5 imes 10^{-8}$ for Large Magellanic Cloud
Cepheids, and $2 imes 10^{-7}M_odot /yr$ for Small Magellanic Cloud Cepheids.
It is argued that mass loss increases as metallicity decreases for Cepheids
with periods less than 20 days and that mass loss decreases for longer periods.
Assuming dust forms in the wind of a Cepheid at some distance, the infrared
excess of the models is computed, finding the infrared brightness is
approximately a magnitude larger due to mass loss. The infrared magnitudes are
compared to recently published Period-Luminosity relations as a test of our
predictions. | | Source: | arXiv, 0809.2793 | | Services: | Forum | Review | PDF | Favorites | |
|
|
No review found.
Did you like this article?
Note: answers to reviews or questions about the article must be posted in the forum section.
Authors are not allowed to review their own article. They can use the forum section.
browser Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)
|
| |
|
|
|
|
News, job offers and information for researchers and scientists:
| |
REGISTER