Science-advisor
REGISTER info/FAQ
Login
username
password
     
forgot password?
register here
 
Research articles
  search articles
  reviews guidelines
  reviews
  articles index
My Pages
my alerts
  my messages
  my reviews
  my favorites
 
 
Stat
Members: 3667
Articles: 2'599'751
Articles rated: 2609

07 February 2025
 
  » arxiv » astro-ph/0107077

 Article overview



A revision of the solar neighbourhood metallicity distribution
Misha Haywood ;
Date 4 Jul 2001
Journal Mon.Not.Roy.Astron.Soc. 325 (2001) 1365
Subject astro-ph
AbstractWe present a revised metallicity distribution of dwarfs in the solar neighbourhood. This distribution is centred on solar metallicity. We show that previous metallicity distributions, selected on the basis of spectral type, are biased against stars with solar metallicity or higher. A selection of G-dwarf stars is inherently biased against metal rich stars and is not representative of the solar neighbourhood metallicity distribution. Using a sample selected on colour, we obtain a distribution where approximately half the stars in the solar neighbourhood has a metallicity higher than [Fe/H]=0. The percentage of mid-metal-poor stars ([Fe/H]$<$-0.5) is approximately 4 per cent, in agreement with present estimates of the thick disc. In order to have a metallicity distribution comparable to chemical evolution model predictions, we convert the star fraction to mass fraction, and show that another bias against metal-rich stars affects dwarf metallicity distributions, due to the colour (or spectral type) limits of the samples. Reconsidering the corrections due to the increasing thickness of the stellar disc with age, we show that the Simple Closed-Box model with no instantaneous recycling approximation gives a reasonable fit to the observed distribution. Comparisons with the age-metallicity relation and abundance ratios suggest that the Simple Closed-Box model may be a viable model of the chemical evolution of the Galaxy at solar radius.
Source arXiv, astro-ph/0107077
Services Forum | Review | PDF | Favorites   
 
Visitor rating: did you like this article? no 1   2   3   4   5   yes

No review found.
 Did you like this article?

This article or document is ...
important:
of broad interest:
readable:
new:
correct:
Global appreciation:

  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.






ScienXe.org
» my Online CV
» Free

home  |  contact  |  terms of use  |  sitemap
Copyright © 2005-2025 - Scimetrica