2015MNRAS.452.3795C

Query : 2015MNRAS.452.3795C

2015MNRAS.452.3795C - Mon. Not. R. Astron. Soc., 452, 3795-3814 (2015/October-1)

Comparison of observed and predicted Lyα and ultraviolet lines in galaxy spectra at redshifts z < 3.7, adopting photoionization + shock composite models.

CONTINI M.

Abstract (from CDS):

We explore the origin of the observed Lyα and other ultraviolet (UV) lines from galaxies at z < 3.7 by detailed modelling of their spectra. The objects are chosen from among those showing (a) UV-optical-near-IR lines, (b) only UV lines and (c) Lyα in the UV and a few optical lines. The total sample is heterogeneous, including galaxies in an all-sky radio survey, hard X-ray-emitting sources, a type 2 quasar (QSR)identified as a X-ray source, a type 2 active galactic nucleus (AGN) at high z (3.7), a very extended Lyα-emitting nebula, objects in a multi-band imaging survey for Lyman-break galaxies and in a slitless spectroscopic survey for Lyman-alpha emitters (LAEs), etc. We also present UV line predictions for a sample of galaxies in the 0.0686 < z < 0.8829 range. For calculation of the line and continuum spectra, we use the code suma, which accounts consistently for photoionizing flux from an external source and shocks. Dust-reprocessed radiation is also calculated. The results show that calculated Lyα/Hβ values are generally higher than observed, except for a few starburst (SB)-dominated models. Some spectra are better reproduced by shock-dominated models. The sample of galaxies including the Lyα line shows neither peculiar gas physical conditions nor abnormal element abundances. The line profiles have complex full widths at half maximum (FWHM) with two main components, which translate into two types of emitting gas clouds. High T* values (>105 K), which indicate that SB stars are close to outburst, were found in a few objects. Traces of supernova events are suggested by a scandium emission line from the SST24 nebula and by shock-dominated models.

Abstract Copyright: © 2015 The Author Published by Oxford University Press on behalf of the Royal Astronomical Society (2015)

Journal keyword(s): radiation mechanisms: general - shock waves - ISM: abundances - galaxies: high-redshift - galaxies: Seyfert - galaxies: starburst

Simbad objects: 48

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Number of rows : 48
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 PMN J0214-1158 rG 02 14 17.4 -11 58 47           ~ 63 1
2 NAME Chandra Deep Field-South reg 03 32 28.0 -27 48 30           ~ 2282 1
3 [VV2006] J033229.9-275106 Sy2 03 32 29.8487 -27 51 05.879   27.5675 25.05 23.970 24.5370 ~ 101 0
4 TXS 0406-244 QSO 04 08 51.463920 -24 18 16.40880     22.40     ~ 82 1
5 LEDA 2824392 QSO 05 30 25.51 -54 54 23.2           ~ 50 2
6 Z 329-24 Sy2 06 15 36.2812259376 +71 02 14.837219808 14.21 14.03 12.97     ~ 960 2
7 4C 41.17 rG 06 50 52.098 +41 30 30.53           ~ 349 1
8 3C 183 rG 07 35 22.4525276184 +43 44 25.041453720           ~ 56 1
9 NVSS J083053+191314 rG 08 30 53.507 +19 13 15.49           ~ 74 1
10 NAME Lynx reg 08 47 +44.6           ~ 67 0
11 [STS2002] 52 AGN 08 48 38.0 +44 53 53       24.220   ~ 32 0
12 NAME Lynx Arc LeI 08 48 48.76 +44 55 48.6           ~ 50 0
13 PMN J0945-2429 rG 09 45 32.6 -24 28 50           ~ 101 1
14 NGC 3393 Sy2 10 48 23.4653152920 -25 09 43.487648784   13.10 13.95 11.67 12.2 ~ 471 1
15 PKS J1140-2628 rG 11 40 48.35884 -26 29 08.6316     22.00     ~ 325 1
16 NAME SMM J123635.6+621424 Sy1 12 36 35.588 +62 14 24.32 24.41 24.0665 24.46 23.8 23.2789 ~ 88 0
17 NAME Hubble Deep Field reg 12 36 49.5 +62 12 58           ~ 1967 1
18 4C 03.24 rG 12 45 38.375 +03 23 20.05           ~ 79 1
19 [LMN2014] MMT 2 EmG 13 23 39.130 +27 32 52.71           ~ 3 0
20 [LMN2014] MMT 3 EmG 13 23 39.170 +27 31 47.34           ~ 4 0
21 [LMN2014] MMT 8 EmG 13 23 42.970 +27 26 35.59           ~ 3 0
22 [LMN2014] Keck 4 EmG 13 23 43.510 +27 34 20.98           ~ 3 0
23 [LMN2014] MMT 9 EmG 13 23 49.800 +27 28 35.32           ~ 3 0
24 [LMN2014] Keck 3 EmG 13 23 53.540 +27 27 13.01           ~ 3 0
25 [LMN2014] MMT 6 EmG 13 23 54.770 +27 20 12.53   24.56 24.03 23.51   ~ 3 0
26 [LMN2014] MMT 10 EmG 13 23 56.390 +27 13 32.98           ~ 4 0
27 [LMN2014] MMT 7 EmG 13 24 06.940 +27 24 01.76           ~ 4 0
28 [LMN2014] MMT 11 EmG 13 24 13.640 +27 25 09.27           ~ 5 0
29 [LMN2014] MMT 13 EmG 13 24 28.880 +27 45 51.88           ~ 3 0
30 [LMK2007] SDF J132434.9+272410 EmG 13 24 34.910 +27 24 10.20   24.6 24.4 24.04   ~ 5 0
31 [LMK2007] SDF J132444.1+272344 EmG 13 24 43.660 +27 23 34.86   26.48 26.31 26.33   ~ 4 0
32 [LMM2016] MMT04 EmG 13 24 46.630 +27 34 56.98           ~ 4 0
33 [LMN2014] Keck 6 EmG 13 24 58.620 +27 26 40.47           ~ 4 0
34 [LMN2014] MMT 5 EmG 13 25 03.370 +27 17 23.77           ~ 3 0
35 [LMK2007] SDF J132511.9+272731 EmG 13 25 11.940 +27 27 31.20   24.73 24.67 24.48   ~ 4 0
36 [LMN2014] MMT 1 EmG 13 25 16.870 +27 39 06.92           ~ 3 0
37 [LMM2016] MMT12 EmG 13 25 21.780 +27 33 15.69           ~ 3 0
38 [LMM2016] MMT14 EmG 13 25 22.940 +27 37 40.33           ~ 4 0
39 4C -00.54 rG 14 13 15.65 -00 23 07.4           ~ 52 1
40 NAME LABd05 EmO 14 34 10.988 +33 17 32.71           ~ 34 1
41 4C 00.54 Rad 14 54 40.850 +00 17 43.21           ~ 8 1
42 IC 1127 SyG 15 34 57.22396 +23 30 11.6084   14.76 13.88     ~ 3090 4
43 NGC 6240 Sy2 16 52 58.9 +02 24 03   14.31 13.37     ~ 1734 2
44 3C 372 rG 18 10 55.697 +40 45 23.63   22.1       ~ 70 1
45 4C 48.48 rG 19 33 05.267 +48 11 41.84           ~ 42 1
46 4C 23.56 rG 21 07 15.080 +23 31 43.71           ~ 117 1
47 NGC 7212a Sy1 22 07 01.9870259424 +10 14 00.838175892   15.1       ~ 217 1
48 XLS 30 EmG 23 46 18.570 +12 47 47.38           ~ 39 0

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