Metallicities of 0.3 < z < 1.0 Galaxies in the GOODS‐North Field
نویسندگان
چکیده
منابع مشابه
The metallicities of luminous , massive field galaxies at intermediate redshifts
We derive oxygen abundances for a sample of 40 luminous (MB . −19), starforming, mostly disk, field galaxies with redshifts in the range 0.2 . z . 0.8, with a median of 〈z〉 = 0.45. Oxygen abundances, relative to hydrogen, of the interstellar emitting gas are estimated by means of the empirically calibrated strong emission line ratio technique. The derived 12 + log(O/H) values range from 8.4 to ...
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چکیده یکی از پارامترهای اصلی در دنبال کردن تاریخچه ی تشکیل ستاره ها و تحول کهکشان ها، مطالعه ی میزان فراوانی عناصر آن ها است. در این پایان نامه برای مطالعه ی همبستگی میان فراوانی فلزی و جرم ستاره ای کهکشان ها، از داده های طیفی 89 کهکشانِ ستاره زا استفاده شده است. طیف ها توسط طیف نگار فورس2 از میدان ژرف جنوبی چاندرا گرفته شده و جابه جایی به سرخ طیف ها همه بزرگتر از نیم و کوچکتر از یک هستند. جر...
15 صفحه اولMetallicities and Physical Conditions in Star-forming Galaxies at Z∼1.0-1.5
We present a study of the mass-metallicity (M-Z) relation and H II region physical conditions in a sample of 20 star-forming galaxies at 1.0 < z < 1.5 drawn from the DEEP2 Galaxy Redshift Survey. We find a correlation between stellar mass and gas-phase oxygen abundance in the sample, and compare it with the one observed among UV-selected z ∼ 2 star-forming galaxies and local objects from the Sl...
متن کاملThe Ages and Metallicities of Galaxies in the Local Universe
We derive stellar metallicities, light-weighted ages and stellar masses for a magnitudelimited sample of 175,128 galaxies drawn from the Sloan Digital Sky Survey Data Release Two (SDSS DR2). We compute median-likelihood estimates of these parameters using a large library of model spectra at medium-high resolution, covering a comprehensive range of star formation histories. The constraints we de...
متن کاملHigh - z massive galaxies in the Hubble Deep Field South
A census of massive galaxies at redshift increasingly higher than z ∼ 1 may provide strong constraints on the history of mass assembly and of star formation. Here we report the analysis of three galaxies selected in the Hubble Deep Field South at Ks≤ 22 on the basis of their unusually red near-IR color J-K≥ 3. We have used population synthesis models to constrain their redshifts and their stell...
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ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 2004
ISSN: 0004-637X,1538-4357
DOI: 10.1086/425299