Similar star formation rate and metallicity variability time-scales drive the fundamental metallicity relation
نویسندگان
چکیده
منابع مشابه
Aperture Effects on Star Formation Rate, Metallicity and Reddening
We use 101 galaxies selected from the Nearby Field Galaxy Survey (NFGS) to investigate the effect of aperture size on the star formation rate, metallicity and reddening determinations for galaxies. Our sample includes galaxies of all Hubble types except ellipticals with global SFRs ranging from 0.01 to 100 M⊙yr , metallicities between 7.9 .log(O/H)+12. 9.0, and reddening between 0 . A(V ) . 3.3...
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Aims. The knowledge of the number and physical nature of low-metallicity massive galaxies is crucial for determining and interpreting the mass-metallicity relation (MZR). Methods. Using VLT-ISAAC near-infrared (NIR) spectroscopy of 39 zCOSMOS 0.5 < z < 0.9 galaxies, we have measured Hα and [N II] λ 6584 emission line fluxes for galaxies with [O II] λ 3727, Hβ, and [O III] λ 5007 available from ...
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We investigate the color-magnitude distribution in the rich cluster AC 118 at z = 0.31. The sample is selected by the photometric redshift technique, allowing to study a wide range of properties of stellar populations, and is complete in the K-band, allowing to study these properties up to a given galaxy mass. We use galaxy templates based on population synthesis models to translate the physica...
متن کاملLow - Metallicity Star Formation : From the First Stars to
Metal-free stars are assumed to evolve at constant mass because of the very low stellar winds. This leads to large CO-core mass at the end of the evolution, so primordial stars with an initial mass between 25 and 85 M are expected to end as direct black holes, the explosion energy being too weak to remove the full envelope. We show that when rotation enters into play, some mass is lost because ...
متن کاملStar Formation at Very Low Metallicity . V . The
The formation of the first stars out of metal-free gas appears to result in stars at least an order of magnitude more massive than in the present-day case. We here consider what controls the transition from a primordial to a modern initial mass function. It has been proposed that this occurs when effective metal line cooling occurs at a metallicity threshold of Z/Z⊙ > 10 . We study the influenc...
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society: Letters
سال: 2018
ISSN: 1745-3925,1745-3933
DOI: 10.1093/mnrasl/sly031