2016MNRAS.458.3443S

Query : 2016MNRAS.458.3443S

2016MNRAS.458.3443S - Mon. Not. R. Astron. Soc., 458, 3443-3454 (2016/June-1)

The nature of Hα star-forming galaxies at z ∼ 0.4 in and around Cl 0939+4713: the environment matters.

SOBRAL D., STROE A., KOYAMA Y., DARVISH B., CALHAU J., AFONSO A., KODAMA T. and NAKATA F.

Abstract (from CDS):

Cluster star-forming galaxies are found to have an excess of far-infrared emission relative to Hα, when compared to those in the field, which could be caused by intense active galactic nuclei (AGN) activity, dust and/or declining star formation histories. Here we present spectroscopic observations of Hα emitters in the Cl 0939+4713 (Abell 851) super-cluster at z=0.41, using AF2+ WYFFOS on the William Herschel Telescope. We measure [O ii], Hβ, [O iii], Hα and [N ii] for a sample of 119 Hα emitters in and around the cluster. We find that 17±5 per cent of the Hα emitters are AGN, irrespective of environment. For star-forming galaxies, we obtain Balmer decrements, metallicities and ionization parameters with different methods, individually and by stacking. We find a strong mass-metallicity relation at all environments, with no significant dependence on environment. The ionization parameter declines with increasing stellar mass for low-mass galaxies. Hα emitters residing in intermediate environments show the highest ionization parameters (along with high [O iii]/Hα and high [O iii]/[O ii] line ratios, typically twice as large as in the highest and lowest densities), which decline with increasing environmental density. Dust extinction (AHα) correlates strongly with stellar mass, but also with environmental density. Star-forming galaxies in the densest environments are found to be significantly dustier (AHα ≃ 1.5 - 1.6) than those residing in the lowest density environments (AHα ≃ 0.6), deviating significantly from what would be predicted given their stellar masses.

Abstract Copyright: © 2016 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): galaxies: clusters: general - galaxies: evolution - intergalactic medium - cosmology: observations - large-scale structure of Universe

VizieR on-line data: <Available at CDS (J/MNRAS/458/3443): tablea1.dat>

Nomenclature: Table A1: [SSK2016] DUSQ NNN N=119 among (Nos 122-610).

Simbad objects: 121

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Number of rows : 121
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 [SSK2016] DUSQ 491 EmG 09 41 28.191 +47 06 39.90           ~ 1 0
2 [SSK2016] DUSQ 457 AGN 09 41 28.547 +47 03 41.18           ~ 1 0
3 [SSK2016] DUSQ 473 EmG 09 41 29.431 +46 49 44.87           ~ 1 0
4 [SSK2016] DUSQ 135 EmG 09 41 29.614 +47 00 42.12           ~ 1 0
5 [SSK2016] DUSQ 550 EmG 09 41 30.720 +47 03 21.05           ~ 1 0
6 [SSK2016] DUSQ 602 EmG 09 41 32.944 +47 09 01.43           ~ 1 0
7 [SSK2016] DUSQ 565 EmG 09 41 35.682 +47 09 35.21           ~ 1 0
8 [SSK2016] DUSQ 594 EmG 09 41 35.884 +46 48 46.53           ~ 1 0
9 [SSK2016] DUSQ 534 EmG 09 41 36.347 +47 09 26.72           ~ 1 0
10 [SSK2016] DUSQ 566 AGN 09 41 36.734 +47 08 56.82           ~ 1 0
11 [SSK2016] DUSQ 305 EmG 09 41 37.889 +46 54 10.45           ~ 1 0
12 [SSK2016] DUSQ 465 EmG 09 41 38.233 +46 52 52.96           ~ 1 0
13 [SSK2016] DUSQ 555 EmG 09 41 40.515 +47 07 06.29           ~ 1 0
14 [SSK2016] DUSQ 349 EmG 09 41 43.593 +47 06 39.23           ~ 1 0
15 [SSK2016] DUSQ 561 EmG 09 41 44.595 +46 56 35.41           ~ 1 0
16 [SSK2016] DUSQ 608 EmG 09 41 45.270 +46 57 50.91           ~ 1 0
17 [SSK2016] DUSQ 466 EmG 09 41 49.344 +46 49 35.41           ~ 1 0
18 [SSK2016] DUSQ 571 EmG 09 41 52.594 +46 58 15.33           ~ 1 0
19 [SSK2016] DUSQ 507 EmG 09 41 53.224 +47 06 33.53           ~ 1 0
20 [SSK2016] DUSQ 558 EmG 09 41 53.578 +47 00 00.21           ~ 1 0
21 [SSK2016] DUSQ 271 EmG 09 41 53.891 +46 52 23.35           ~ 1 0
22 [SSK2016] DUSQ 589 EmG 09 41 54.761 +46 58 42.49           ~ 1 0
23 [SSK2016] DUSQ 577 AGN 09 41 55.541 +46 55 31.20           ~ 1 0
24 [SSK2016] DUSQ 572 EmG 09 41 56.239 +46 56 08.78           ~ 1 0
25 [SSK2016] DUSQ 523 AGN 09 41 57.671 +47 11 08.49           ~ 1 0
26 [SSK2016] DUSQ 202 EmG 09 42 01.043 +46 49 02.72           ~ 1 0
27 [SSK2016] DUSQ 540 EmG 09 42 01.762 +46 55 02.29           ~ 1 0
28 [SSK2016] DUSQ 593 EmG 09 42 03.097 +46 55 26.63           ~ 1 0
29 [SSK2016] DUSQ 526 EmG 09 42 03.265 +46 59 28.66           ~ 1 0
30 [SSK2016] DUSQ 601 EmG 09 42 03.571 +46 59 29.04           ~ 1 0
31 [SSK2016] DUSQ 515 EmG 09 42 03.648 +46 54 45.98           ~ 1 0
32 [SSK2016] DUSQ 591 EmG 09 42 04.951 +46 57 06.55           ~ 1 0
33 [SSK2016] DUSQ 281 EmG 09 42 08.208 +47 09 19.32           ~ 1 0
34 [SSK2016] DUSQ 584 EmG 09 42 10.644 +46 55 48.94           ~ 1 0
35 [SSK2016] DUSQ 455 EmG 09 42 16.209 +47 04 46.55           ~ 1 0
36 [SSK2016] DUSQ 494 AGN 09 42 17.849 +47 00 42.06           ~ 1 0
37 [SSK2016] DUSQ 138 EmG 09 42 18.024 +46 45 30.67           ~ 1 0
38 [SSK2016] DUSQ 585 EmG 09 42 19.249 +47 01 01.10           ~ 1 0
39 [SSK2016] DUSQ 505 EmG 09 42 21.215 +47 02 31.56           ~ 1 0
40 [SSK2016] DUSQ 378 EmG 09 42 21.338 +46 51 47.75           ~ 1 0
41 [SSK2016] DUSQ 446 EmG 09 42 25.014 +46 45 00.00           ~ 1 0
42 [SSK2016] DUSQ 452 EmG 09 42 26.645 +47 01 07.53           ~ 1 0
43 [SSK2016] DUSQ 430 EmG 09 42 30.44 +47 02 25.9           ~ 2 0
44 [SSK2016] DUSQ 579 EmG 09 42 30.904 +46 53 42.97           ~ 1 0
45 [SSK2016] DUSQ 380 AGN 09 42 32.297 +46 59 49.95           ~ 1 0
46 [SSK2016] DUSQ 409 EmG 09 42 32.460 +46 51 33.44           ~ 1 0
47 [ODK2009] 464 EmG 09 42 32.70 +47 02 59.9           ~ 2 0
48 [ODK2009] 320 EmG 09 42 33.20 +47 00 11.2           ~ 2 0
49 [SSK2016] DUSQ 582 AGN 09 42 33.595 +47 04 30.46           ~ 1 0
50 [SSK2016] DUSQ 475 EmG 09 42 33.794 +47 10 05.34           ~ 1 0
51 [SSK2016] DUSQ 598 EmG 09 42 34.234 +46 55 46.83           ~ 1 0
52 [ODK2009] 463 EmG 09 42 34.50 +47 02 34.1           ~ 2 0
53 [SSK2016] DUSQ 525 EmG 09 42 35.417 +47 03 36.00           ~ 1 0
54 [SSK2016] DUSQ 568 EmG 09 42 35.474 +47 09 47.17           ~ 1 0
55 [SSK2016] DUSQ 580 EmG 09 42 37.975 +46 54 02.53           ~ 1 0
56 [SSK2016] DUSQ 323 EmG 09 42 38.664 +46 58 02.68           ~ 1 0
57 [SSK2016] DUSQ 542 EmG 09 42 40.546 +46 56 55.32           ~ 1 0
58 [SSK2016] DUSQ 424 EmG 09 42 43.885 +47 02 16.15           ~ 1 0
59 [SSK2016] DUSQ 122 EmG 09 42 44.504 +47 01 42.19           ~ 1 0
60 [SSK2016] DUSQ 396 EmG 09 42 44.856 +46 46 31.45           ~ 1 0
61 [SSK2016] DUSQ 552 EmG 09 42 45.829 +46 55 00.94           ~ 1 0
62 [SSK2016] DUSQ 520 AGN 09 42 47.596 +47 06 02.73           ~ 1 0
63 GALEX J094250.5+470049 EmG 09 42 50.59 +47 00 47.9   19.1   18.8   ~ 6 0
64 [SSK2016] DUSQ 503 EmG 09 42 50.740 +46 51 27.63           ~ 1 0
65 [SSK2016] DUSQ 609 EmG 09 42 52.445 +46 46 37.62           ~ 1 0
66 [SSK2016] DUSQ 539 EmG 09 42 54.075 +46 53 26.50           ~ 1 0
67 [SSK2016] DUSQ 419 EmG 09 42 54.897 +46 46 00.21           ~ 1 0
68 [SSK2016] DUSQ 529 EmG 09 42 55.909 +47 05 12.10           ~ 1 0
69 [SSK2016] DUSQ 573 AGN 09 42 56.527 +46 53 09.70           ~ 1 0
70 [MLF2000] 3215 EmG 09 42 56.54 +46 58 58.4           ~ 10 0
71 [SSK2016] DUSQ 406 EmG 09 42 56.685 +47 09 34.44           ~ 1 0
72 [SSK2016] DUSQ 597 EmG 09 42 57.032 +46 53 01.39           ~ 1 0
73 [SSK2016] DUSQ 471 EmG 09 42 57.170 +47 00 53.29           ~ 1 0
74 [DG92] 4-214 EmG 09 42 57.27 +46 58 07.8           ~ 7 0
75 [SSK2016] DUSQ 543 EmG 09 42 57.532 +47 06 48.66           ~ 1 0
76 [SSK2016] DUSQ 506 EmG 09 42 57.667 +46 48 58.09           ~ 1 0
77 [BBT95] 94 EmG 09 42 59.08 +47 01 04.3           ~ 3 0
78 [SSK2016] DUSQ 596 EmG 09 42 59.915 +47 05 27.25           ~ 1 0
79 [SSK2016] DUSQ 545 EmG 09 43 00.421 +46 48 01.44           ~ 1 0
80 ACO 851 ClG 09 43 01.2 +46 59 54   18.9       ~ 334 0
81 [BR96] Cl 0939+472 39 AGN 09 43 01.59 +47 00 31.4           ~ 5 0
82 [BR96] Cl 0939+472 527 EmG 09 43 01.91 +46 57 54.7           ~ 4 0
83 [MLF2000] 1640 EmG 09 43 03.94 +46 55 40.2           ~ 2 0
84 [BR96] Cl 0939+472 5 AGN 09 43 04.63 +47 00 45.3           ~ 3 0
85 [SSK2016] DUSQ 592 EmG 09 43 07.390 +47 09 05.79           ~ 1 0
86 [SSK2016] DUSQ 480 EmG 09 43 08.117 +47 11 43.52           ~ 1 0
87 [SSK2016] DUSQ 504 EmG 09 43 08.319 +47 06 55.37           ~ 1 0
88 [SSK2016] DUSQ 583 EmG 09 43 10.472 +47 07 55.45           ~ 1 0
89 [SSK2016] DUSQ 438 EmG 09 43 10.951 +46 47 07.93           ~ 1 0
90 [SSK2016] DUSQ 220 EmG 09 43 11.510 +46 45 26.47           ~ 1 0
91 [SSK2016] DUSQ 586 EmG 09 43 11.643 +47 08 41.41           ~ 1 0
92 [SSK2016] DUSQ 518 EmG 09 43 13.173 +47 08 11.92           ~ 1 0
93 [SSK2016] DUSQ 342 EmG 09 43 13.479 +46 56 24.67           ~ 1 0
94 [SSK2016] DUSQ 574 EmG 09 43 13.643 +46 55 28.46           ~ 1 0
95 [SSK2016] DUSQ 576 EmG 09 43 15.947 +47 02 21.91           ~ 1 0
96 [SSK2016] DUSQ 432 AGN 09 43 17.970 +46 57 15.08           ~ 1 0
97 [SSK2016] DUSQ 345 EmG 09 43 25.883 +47 03 16.09           ~ 1 0
98 [SSK2016] DUSQ 283 EmG 09 43 26.618 +47 06 59.78           ~ 1 0
99 [SSK2016] DUSQ 456 EmG 09 43 30.103 +47 07 39.07           ~ 1 0
100 [SSK2016] DUSQ 590 AGN 09 43 30.411 +47 04 10.36           ~ 1 0
101 [SSK2016] DUSQ 604 EmG 09 43 30.797 +47 11 42.54           ~ 1 0
102 [SSK2016] DUSQ 595 EmG 09 43 30.938 +47 11 44.27           ~ 1 0
103 [SSK2016] DUSQ 531 EmG 09 43 31.273 +46 49 05.54           ~ 1 0
104 [SSK2016] DUSQ 569 EmG 09 43 31.285 +46 58 22.60           ~ 1 0
105 [SSK2016] DUSQ 426 EmG 09 43 37.364 +46 55 46.90           ~ 1 0
106 [SSK2016] DUSQ 606 EmG 09 43 37.853 +46 47 45.57           ~ 1 0
107 [SSK2016] DUSQ 307 AGN 09 43 38.247 +46 54 38.57           ~ 1 0
108 [SSK2016] DUSQ 514 EmG 09 43 39.399 +46 58 53.31           ~ 1 0
109 [SSK2016] DUSQ 551 EmG 09 43 42.835 +47 08 50.49           ~ 1 0
110 [SSK2016] DUSQ 549 EmG 09 43 44.044 +47 00 56.00           ~ 1 0
111 [SSK2016] DUSQ 607 EmG 09 43 45.296 +47 00 32.51           ~ 1 0
112 [SSK2016] DUSQ 536 EmG 09 43 45.467 +47 04 05.45           ~ 1 0
113 [SSK2016] DUSQ 454 AGN 09 43 46.796 +47 00 55.17           ~ 1 0
114 [SSK2016] DUSQ 444 EmG 09 43 53.498 +46 55 46.44           ~ 1 0
115 [SSK2016] DUSQ 320 EmG 09 43 54.469 +46 57 15.19           ~ 1 0
116 [SSK2016] DUSQ 207 EmG 09 43 54.517 +46 49 14.63           ~ 1 0
117 [SSK2016] DUSQ 226 EmG 09 44 02.098 +46 54 09.78           ~ 1 0
118 [SSK2016] DUSQ 164 EmG 09 44 02.183 +46 49 23.80           ~ 1 0
119 [SSK2016] DUSQ 208 EmG 09 44 04.349 +46 50 10.49           ~ 1 0
120 [SSK2016] DUSQ 490 EmG 09 44 05.306 +46 56 08.58           ~ 1 0
121 NAME Virgo Cluster ClG 12 30 47.8 +12 23 07           ~ 7107 0

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