2006A&A...454..137I

Query : 2006A&A...454..137I

2006A&A...454..137I - Astronomy and Astrophysics, volume 454137-141 (2006/7-4)

Two extremely metal-poor emission-line galaxies in the Sloan Digital Sky Survey.

IZOTOV Y.I., PAPADEROS P., GUSEVA N.G., FRICKE K.J. and THUAN T.X.

Abstract (from CDS):

We present spectroscopic observations with the 3.6 m ESO telescope of two emission-line galaxies, J2104-0035 and J0113+0052, selected from the Data Release 4 (DR4) of the Sloan Digital Sky Survey (SDSS). From our data we determine the oxygen abundance of these systems to be respectively 12+logO/H=7.26±0.03 and 7.17±0.09, making them the two most metal-deficient galaxies found thus far in the SDSS and placing them among the five most metal-deficient emission-line galaxies ever discovered. Their oxygen abundances are close to those of the two most metal-deficient emission-line galaxies known, SBS 0335-052W with 12+logO/H=7.12±0.03 and I Zw 18 with 12+logO/H=7.17±0.01.

Abstract Copyright: ∼

Journal keyword(s): galaxies: fundamental parameters - galaxies: starburst - galaxies: abundances

Nomenclature: Figs 1: [IPG2006] JHHMM+DDMM N=2, [IPG2006] J2104-0035W (Nos C, N), [IPG2006] J2104-0035 star N=1, [IPG2006] J0113+0052 BG N=1.

CDS comments: J2104-0035 = J2104-0035C = SDSS J210455.31-003522.3, J0113+0052 = SDSS J011340.45+005239.1.

Simbad objects: 4

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Number of rows : 4
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 MCG+00-04-043 LSB 01 13 40.450 +00 52 39.16   17       ~ 65 0
2 [PBT2001] SBSG 0335-052 W G 03 37 38.40 -05 02 37.5   19.14     18.85 ~ 110 1
3 Mrk 116 AGN 09 34 02.1 +55 14 25           ~ 1179 1
4 LEDA 1139658 G 21 04 55.310 -00 35 22.38           ~ 33 0

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