Extreme emission-line galaxies out to z ~ 1 in zCOSMOS - I. Sample and characterization of global properties

R. Amorín; E. Pérez-Montero; T. Contini; J. M. Vílchez; M. Bolzonella; L. A. M. Tasca; F. Lamareille; G. Zamorani; C. Maier; C. M. Carollo; J.-P. Kneib; O. Le Fèvre; S. Lilly; V. Mainieri; A. Renzini; M. Scodeggio; S. Bardelli; A. Bongiorno; K. Caputi; O. Cucciati; S. de la Torre; L. de Ravel; P. Franzetti; B. Garilli; A. Iovino; P. Kampczyk; C. Knobel; K. Kovač; J.-F. Le Borgne; V. Le Brun; M. Mignoli; R. Pellò; Y. Peng; V. Presotto; E. Ricciardelli; J. D. Silverman; M. Tanaka; L. Tresse; D. Vergani; E. Zucca

doi:10.1051/0004-6361/201322786

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Volume 578 (June 2015)

A&A, 578 (2015) A105

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Table 4

The properties of very metal-poor EELGs in zCOSMOS.

zCOSMOS ID	z	MT	c(H_β)	EW(Hβ)	t_e([O iii])	log(O iii/Hβ)	log([N ii]/Hα)	log(N/O)	12+log (O/H)
(1)	(2)	(3)	(4)	(5)	(6)	(7)	(8)	(9)	(10)

701741	0.504	2	0.12±0.05	113±20	2.28±0.11	0.50±0.05	...	...	7.46±0.15^b
809215	0.124	2	0.20±0.07^a	...	...	...	–1.79±0.18	–1.83±0.15^e	7.65±0.07^d
825959	0.690	3	0.00±0.08^a	66±13	1.87±0.06	0.52±0.06	...	...	7.56±0.12^b
836108	0.351	3	0.30±0.13	74±16	1.92±0.04	0.77±0.04	...	...	7.47±0.10^c
840051	0.250	1	0.28±0.04	84±10	...	0.61±0.02	–1.75±0.11	–2.00±0.26^e	7.69±0.08^d
840962	0.121	1	0.31±0.06^a	...	...	...	–2.18±0.13	–1.75±0.24^e	7.35±0.11^d

Notes. Columns: (1) zCOSMOS identification number; (2) redshift; (3) morphological type: (1) regular, (2) clumpy/Irregular, (3) cometary/Tadpole; (4) reddening constant from the Hα/Hβ ratio, except for those with the superscript

^a

which are taken from SED fitting; (5) Hβ equivalent width in Å; (6) [O iii] electron temperature in units of 10⁴ K; (7) [O iii]5007/Hβ ratio; (8) N2 parameter; (9) Nitrogen-to-oxygen ratio; (10) gas-phase metallicity; method used to derive metallicity and N/O:

^b

= Direct method,

^c

T([O iii])− Z,

^d

= N2,

^e

= N2S2.

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