First Stellar Abundances in the Dwarf Irregular Galaxy IC 1613

Details First Stellar Abundances in the Dwarf Irregular Galaxy IC 1613 First Stellar Abundances in the Dwarf Irregular Galaxy IC 1613

Dec 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aj....134.2318t&link_type=abstract

The Astronomical Journal, Volume 134, Issue 6, pp. 2318-2327 (2007).

Astronomy and Astrophysics

Astronomy

13

Galaxies: Abundances, Galaxies: Individual: Ic 1613, Stars: Abundances, Supergiants

Scientific paper

Chemical abundances in three M supergiants in the Local Group dwarf irregular galaxy IC 1613 have been determined using high-resolution spectra obtained with the UVES spectrograph on the ESO 8.2 m Kueyen telescope. A detailed synthetic-spectrum analysis has been used to determine the atmospheric parameters and abundances of O, Na, Mg, Al, Si, Ca, Sc, Ti, Cr, Fe, Co, Ni, La, and Eu. We find the overall metallicity of the stars to be [Fe/H] = -0.67 ± 0.09 and the age 9-13 Myr, which is in excellent agreement with the present-day values in the age-metallicity relationship model of IC 1613 by Skillman et al. We have found that the three supergiants investigated have a mean [α/Fe] equal to about -0.1, which is lower than seen in Galactic stars at the same metallicity and is in agreement with the results obtained in other dwarf irregular galaxies. The oxygen abundances are in agreement with the upper values of the nebular oxygen determinations in IC 1613. The abundance ratios of s- and r-process elements to iron are enhanced relative to solar by about 0.3 dex. The abundance pattern of the elements studied is similar to that of the Small Magellanic Cloud, except for Co and Ni, which are underabundant in the SMC. The observed elemental abundances are generally in very good agreement with the recent chemical evolution model of Yuk and Lee.
Based on observations collected with the Very Large Telescope and the 2.2 m Telescope of the European Southern Observatory within the Observing Programs 70.B-0361(A) and 072.D-0113(D).

Affiliated with

Also associated with

No associations

Rating

First Stellar Abundances in the Dwarf Irregular Galaxy IC 1613 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with First Stellar Abundances in the Dwarf Irregular Galaxy IC 1613, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and First Stellar Abundances in the Dwarf Irregular Galaxy IC 1613 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1526629