2013MNRAS.429.2351R


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.12CEST15:15:04

2013MNRAS.429.2351R - Mon. Not. R. Astron. Soc., 429, 2351-2360 (2013/March-1)

Outside-in stellar formation in the spiral galaxy M33?

ROBLES-VALDEZ F., CARIGI L. and PEIMBERT M.

Abstract (from CDS):

We present and discuss results from chemical evolution models for M33. For our models we adopt a galactic formation with an inside-out scenario. The models are built to reproduce three observational constraints of the M33 disc: the radial distributions of the total baryonic mass, the gas mass, and the O/H abundance. From observations, we find that the total baryonic mass profile in M33 has a double exponential behaviour, decreasing exponentially for r ≤ 6kpc, and increasing lightly for r > 6kpc due to the increase of the gas mass surface density. To adopt a concordant set of stellar and Hii region O/H values, we had to correct the latter for the effect of temperature variations and O dust depletion. Our best model shows a good agreement with the observed radial distributions of: the star formation rate (SFR), the stellar mass, C/H, N/H, Ne/H, Mg/H, Si/H, P/H, S/H, Ar/H, Fe/H and Z. According to our model, the star formation efficiency is constant in time and space for r ≤ 6kpc, but the SFR efficiency decreases with time and galactocentric distance for r > 6kpc. The reduction of the SFR efficiency occurs earlier at higher r. While the galaxy follows the inside-out formation scenario for all r, the stars follow the inside-out scenario only up to r = 6kpc, but for r > 6kpc the stars follow an outside-in formation. The stellar formation histories inferred for each r imply that the average age of the stars for r > 6 increases with r.

Abstract Copyright: © 2012 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2012)

Journal keyword(s): galaxy: abundances - galaxy: evolution - galaxies: individual: M33

Simbad objects: 6

goto Full paper

goto View the reference in ADS

Number of rows : 6

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 M 31 G 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 10905 1
2 NGC 595 HII 01 33 33.53 +30 41 29.8           ~ 190 0
3 M 33 GiG 01 33 50.904 +30 39 35.79 6.17 6.27 5.72     ~ 5135 1
4 NGC 604 HII 01 34 32.1 +30 47 01           ~ 544 0
5 NGC 6822 G 19 44 56.199 -14 47 51.29   18 8.1     ~ 1430 0
6 NAME Local Group GrG ~ ~           ~ 6973 0

    Equat.    Gal    SGal    Ecl

To bookmark this query, right click on this link: simbad:objects in 2013MNRAS.429.2351R and select 'bookmark this link' or equivalent in the popup menu


2020.07.12-15:15:04

© Université de Strasbourg/CNRS

    • Contact