|
| | | | |
| | | |
| Stat |
Members: 3645
Articles: 2'506'133
Articles rated: 2609
26 April 2024 |
|
| | | | |
|
Article overview
| |
|
|
Evolution of Dust-to-Metal Ratio in Galaxies | | Akio K. Inoue
; | | Date: |
12 Aug 2003 | | Subject: | astro-ph | | Abstract: | This paper investigates the evolution of the dust-to-metal ratio in galaxies based on a simple evolution model for the amount of metal and dust with infall. We take into account grain formation in stellar mass-loss gas, grain growth by the accretion of metallic atoms in a cold dense cloud, and grain destruction by SNe shocks. Especially, we propose that the accretion efficiency is independent of the star-formation history. This predicts various evolutionary tracks in the metallicity ($Z$)--dust-to-gas ratio ($cal D$) plane depending on the star-formation history. In this framework, the observed linear $Z$--$cal D$ relation of nearby spiral galaxies can be interpreted as a sequence of a constant galactic age. We emphasize that an observational study of the $Z$--$cal D$ relation of galaxies at $zsim 1$ is very useful to constrain the efficiencies of dust growth and destruction. We also suggest that the Lyman break galaxies at $zsim 3$ have a very low dust-to-metal ratio, typically $ltsim 0.1$. Although the effect of infall on the evolutionary tracks in the $Z$--$cal D$ plane is quite small, the dispersion of the infall rate can disturb the $Z$--$cal D$ relation with a constant galactic age. | | Source: | arXiv, astro-ph/0308204 | | 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