منابع مشابه
The near-IR luminosity-metallicity relationship for dwarf irregular galaxies
We briefly describe our on-going investigation of the near-IR luminosity-metallicity relationship for dwarf irregular galaxies in nearby groups of galaxies. The motivations of the project and the observational databases are introduced, and a preliminary result is presented. The 12 + log(O/H) vs. H plane must be populated with more low-luminosity galaxies before a definite conclusion can be drawn.
متن کاملThe Luminosity-Metallicity Relation, Effective Yields, and Metal Loss in Spiral and Irregular Galaxies
I present results on the correlation between galaxy mass, luminosity, and metallicity for a sample of spiral and irregular galaxies having well-measured abundance profiles, distances, and rotation speeds. Additional data for low surface brightness galaxies from the literature are also included for comparison. These data are combined to study the metallicity-luminosity and metallicityrotation sp...
متن کاملMass-Metallicity Relations for Nearby Dwarf Irregular Galaxies
For a sample of 25 dwarf irregular galaxies with distances D ∼ < 5 Mpc and measured oxygen abundances, we present results derived from galaxy luminosities at 4.5 μm and stellar masses from near-infrared imaging with IRAC on the Spitzer Space Telescope. We have constructed the appropriate luminosity-metallicity (L–Z) and mass-metallicity (M–Z) relations, and compared these relations with their c...
متن کاملThe Luminosity - Metallicity Relation of distant luminous infrared galaxies ⋆
One hundred and five 15μm selected objects in three ISO (Infrared Space Observatory) deep survey fields (CFRS 3, UDSR and UDSF) are studied on the basis of their high quality optical spectra with resolution R>1000 from VLT/FORS2. Ninety two objects (88%) have secure redshifts, ranging from 0 to 1.16 with a median value of zmed=0.587. Considerable care is taken in estimating the extinction prope...
متن کاملThe Universal Stellar Mass–stellar Metallicity Relation for Dwarf Galaxies
We present spectroscopic metallicities of individual stars in seven gas-rich dwarf irregular galaxies (dIrrs), and we show that dIrrs obey the same mass–metallicity relation as the dwarf spheroidal (dSph) satellites of both the Milky Way and M31: Z∗ ∝ M 0.30±0.02 ∗ . The uniformity of the relation is in contradiction to previous estimates of metallicity based on photometry. This relationship is...
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ژورنال
عنوان ژورنال: Proceedings of the International Astronomical Union
سال: 2005
ISSN: 1743-9213,1743-9221
DOI: 10.1017/s1743921305003753