2008A&A...491..131L

Query : 2008A&A...491..131L

2008A&A...491..131L - Astronomy and Astrophysics, volume 491131-156 (2008/11-3)

Massive star formation in Wolf-Rayet galaxies. I. Optical and NIR photometric results.

LOPEZ-SANCHEZ A.R. and ESTEBAN C.

Abstract (from CDS):

We have performed a comprehensive multiwavelength analysis of a sample of 20 starburst galaxies that show the presence of a substantial population of massive stars. The main aims are the study of the massive star formation and stellar populations in these galaxies, and the role that interactions with or between dwarf galaxies and/or low surface companion objects have in triggering the bursts. In this series of papers, we present our new optical and near-infrared photometric and spectroscopic observations, and complete with data at other wavelengths (X-ray, far-infrared, and radio) available in the literature. In this paper, the first in the series, we analyze the morphology, stellar population age, and star-formation rate of each system. We completed new deep optical and NIR broad-band images, as well as the new continuum-subtracted Hα maps, of our sample of Wolf-Rayet galaxies. We analyze the morphology of each system and its surroundings and quantify the photometric properties of all important objects. All data were corrected for both extinction and nebular emission using our spectroscopic data. The age of the most recent star-formation burst is estimated and compared with the age of the underlying older low-luminosity population. The Hα-based star-formation rate, number of O7V equivalent stars, mass of ionized gas, and mass of the ionizing star cluster are also derived. We found interaction features in many (15 up to 20) of the analyzed objects, which were extremely evident in the majority. We checked that the correction for nebular emission to the broad-band filter fluxes is important in compact objects and/or with intense nebular emission to obtain realistic colors and compare with the predictions of evolutionary synthesis models. The estimate of the age of the most recent star-formation burst is derived consistently. In general, the Hα-based star formation rate agrees with the estimates given by independent multiwavelength methods. With respect to the results found in individual objects, we remark the strong Hα emission found in IRAS 08208+2816, UM 420, and SBS 0948+532, the detection of a double-nucleus in SBS 0926+606A, a possible galactic wind in Tol 9, and one (two?) nearby dwarf star-forming galaxies surrounding Tol 1457-437.

Abstract Copyright: ∼

Journal keyword(s): galaxies: dwarf - galaxies: starburst - galaxies: photometry - galaxies: interactions - stars: Wolf-Rayet

Nomenclature: Figs, Tables 5, 7: [LE2008] Mrk NNNN A, [LE2008] Mrk NNNN a, [LE2008] Mrk NNNN AN, [LE2008] Mrk NNNN aN, N=10, [LE2008] IRAS 08208+2816 NN (Nos 1-10), [LE2008] SBSG HHMM+DDdA A, [LE2008] SBSG HHMM+DDdA AN, [LE2008] SBSG HHMM+DDdA a, [LE2008] SBSG HHMM+DDdA aN, N=24, [LE2008] III Zw 107 A (Nos A-C), [LE2008] Tol 9 comp N (Nos 1-2), [LE2008] Tol 9 N (Nos 1-6), [LE2008] Tol 1457-262 Obj N (Nos 1-2), [LE2008] Tol 1457-262 NN (Nos 1-16), [LE2008] Tol 1457-262 A (Nos A-C), [LE2008] Tol 1457-262 a (Nos a-g), [LE2008] Arp 252 aN N=8.

CDS comments: Abstract: Tol 1457-437 is a probable misprint for Tol 1457-262. Table 1 ESO 435-42 is a misprint for ESO 436-42. Paragraph. 3.12.1 SBS 1045+365 and SBS 1054+364 are misprint for SBSG 1054+365. Paragraph 3.15.1 SBS 1415+457 is a misprint for SBSG 1415+437. Paragraph 3.15.2 SBS 1319+437 is a probable misprint for SBSG 1415+437. Paragraph 4. IRAS 08298+2816 is a probable misprint for IRAS 08208+2816. In reflist Lopez-Sanchez 2004 A&A, 428, 445 is a misprint for Lopez-Sanchez 2004 A&A, 428, 425. Mendez 1999, AJ, 118, 2733 is a misprint for Mendez 1999, AJ, 118, 2723.

Simbad objects: 73

goto Full paper

goto View the references in ADS

Number of rows : 73
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-02-03-019 bCG 00 48 35.430 -12 42 59.77   15.5       ~ 109 0
2 NGC 579 GiG 01 31 46.5032678328 +33 36 55.999075500   13.6       ~ 69 0
3 Z 388-4 G 02 20 53.4333807984 +00 33 24.391158372           ~ 22 1
4 IRAS F02183+0019 AGN 02 20 54.530 +00 33 24.46   16.50       ~ 60 1
5 Z 420-3 GiP 04 49 38.0038924872 +03 19 29.834360688   16.27 15.48     ~ 15 1
6 Z 420-4 AGN 04 49 44.469 +03 20 02.67   15.49 15.04     ~ 77 1
7 LEDA 16571 G 05 01 35.3 -04 15 24   18.53   17.06   ~ 28 0
8 NGC 1741B G 05 01 35.550 -04 15 47.42   15.35   14.73   ~ 66 0
9 HCG 31 CGG 05 01 37 -04 15.4           ~ 132 0
10 HCG 31e G 05 01 37.5 -04 15 57           ~ 26 0
11 LEDA 16573 G 05 01 37.832 -04 15 28.48   13.44   12.76   ~ 74 1
12 NGC 1741 EmG 05 01 38.3 -04 15 25   13.7   13.02 13.6 ~ 273 0
13 HCG 31f1 PoG 05 01 39.71 -04 16 22.2           ~ 11 0
14 HCG 31a1 G 05 01 39.74 -04 15 12.4           ~ 6 0
15 HCG 31f AG? 05 01 40.02 -04 16 22.4           ~ 22 0
16 HCG 31f2 PoG 05 01 40.15 -04 16 27.5           ~ 10 0
17 IC 399 EmG 05 01 44.0604445128 -04 17 19.319048052   15.0 14.8     ~ 76 0
18 Z 395-12 bCG 05 10 48.1123757064 -02 40 53.685168744   14.0 14.4     ~ 91 1
19 Mrk 5 H2G 06 42 15.53 +75 37 32.6   17.0       ~ 114 0
20 Z 177-5 GiG 07 23 43.5303502320 +33 26 30.926307192   13.7 13.13     ~ 116 1
21 IC 2184 PaG 07 29 27.015 +72 07 51.48   14.00       ~ 95 1
22 2MFGC 6625 EmG 08 23 54.9678898128 +28 06 21.581238276   15.5       ~ 80 0
23 MCG-04-21-005 AGN 08 36 15.190 -26 24 33.66 12.04 11.93 11.45 11.09 12.3 ~ 600 3
24 2MASX J08382309+6507160 SBG 08 38 23.093 +65 07 16.05     14.16     ~ 141 2
25 Z 33-32 AG? 08 58 29.864 +06 19 17.26   16.23 15.69     ~ 42 0
26 LB 555 EmG 09 30 06.4773062016 +60 26 53.169485316   17.0       ~ 37 0
27 LEDA 26955 AG? 09 30 09.04150 +60 28 05.3595           ~ 48 0
28 SBSG 0926+606B GiP 09 30 09.6 +60 28 04   18.0       ~ 12 0
29 APG 252 IG 09 44.8 -19 41           ~ 12 0
30 MCG-03-25-019a G 09 44 58.5869668636 -19 43 32.078825286   15.36   14.66   ~ 15 0
31 MCG-03-25-019b Sy2 09 44 59.6888690456 -19 42 45.253639807   15.56   14.59   ~ 32 0
32 LEDA 28398 EmG 09 51 31.7596930512 +52 59 35.987746452   18       ~ 45 0
33 LEDA 740192 EmG 10 34 35.6551503096 -28 34 05.485972764   15.58   14.29   ~ 29 0
34 2MASX J10343675-2835218 GiC 10 34 36.7313165712 -28 35 21.459518412   16.54   15.68   ~ 12 0
35 ESO 436-42 Sy2 10 34 38.727 -28 34 59.80   14.44 14.41 13.26   ~ 63 0
36 HIPASS J1034-28 ClG 10 34.8 -28 29           ~ 8 0
37 MCG-05-25-017 EmG 10 34 50.5358269944 -28 34 58.928165544   13.44   12.24   ~ 43 0
38 NAME Hydra I Cluster ClG 10 36 36.0 -27 31 04           ~ 905 1
39 NGC 3432 AG? 10 52 31.132 +36 37 07.60   11.81 11.67 11.29   ~ 321 1
40 Z 184-40 AG? 10 57 47.0075966640 +36 15 38.824306272   15.5 16     ~ 45 1
41 POX 4b EmO 11 51 11.0 -20 35 58           ~ 4 1
42 [ME99] Pox 4 2 PoG 11 51 11.0 -20 35 58           ~ 1 0
43 [ME99] Pox 4 5 PoG 11 51 11.0 -20 35 58           ~ 1 0
44 [ME99] Pox 4 7 PoG 11 51 11.0 -20 35 58           ~ 1 0
45 [ME99] Pox 4 1 PoG 11 51 11.0 -20 35 58           ~ 1 0
46 [ME99] Pox 4 17 PoG 11 51 11.0 -20 35 58           ~ 1 0
47 [ME99] Pox 4 4 PoG 11 51 11.0 -20 35 58           ~ 1 0
48 [ME99] Pox 4 11 PoG 11 51 11.0 -20 35 58           ~ 1 0
49 [ME99] Pox 4 16 PoG 11 51 11.0 -20 35 58           ~ 1 0
50 [ME99] Pox 4 12 PoG 11 51 11.0 -20 35 58           ~ 1 0
51 [ME99] Pox 4 13 PoG 11 51 11.0 -20 35 58           ~ 1 0
52 [ME99] Pox 4 14 PoG 11 51 11.0 -20 35 58           ~ 1 0
53 [ME99] Pox 4 8 PoG 11 51 11.0 -20 35 58           ~ 1 0
54 [ME99] Pox 4 10 PoG 11 51 11.0 -20 35 58           ~ 1 0
55 [ME99] Pox 4 15 PoG 11 51 11.0 -20 35 58           ~ 1 0
56 6dFGS gJ115111.7-203557 H2G 11 51 11.7 -20 35 56   15.67   15.35   ~ 87 1
57 LEDA 39055 EmG 12 14 02.4588226248 +53 45 17.525587212   18       ~ 87 0
58 NGC 5113 AG? 13 21 22.57 +57 41 29.5   15.2       ~ 21 0
59 LEDA 2816050 G 13 21 22.6 +57 41 29   18.5       ~ 26 0
60 2MASX J13212499+5741501 GiP 13 21 24.045 +57 41 40.13   18.5       ~ 32 0
61 SBSG 1319+579C G 13 21 25.10 +57 42 38.0           ~ 17 0
62 IC 4249 EmG 13 27 06.5667095424 -27 57 23.385136788   14.48 14.57 13.52 13.87 ~ 86 0
63 NGC 5253 rG 13 39 55.990 -31 38 24.11 11.48 10.94 10.49 10.33 13.47 ~ 1421 4
64 Z 219-66 QSO 14 17 01.716 +43 30 13.52   15.6       ~ 181 0
65 ESO 513-11 PaG 15 00 27.10 -26 26 57.0   15.85       ~ 54 0
66 Z 476-55 EmG 23 30 09.7 +25 31 56   15.0       ~ 57 0
67 NAME Local Group GrG ~ ~           ~ 9325 0
68 [LER2004] KPG 103a K1 PoG ~ ~   17.55       ~ 3 1
69 [LER2004] Mrk 1087 N G ~ ~   17.58       ~ 3 1
70 [ME99] Pox 4 9 PoG ~ ~           ~ 2 0
71 HCG 31h G ~ ~           ~ 9 0
72 [ME99] Pox 4 3 PoG ~ ~           ~ 2 0
73 [ME99] Pox 4 6 PoG ~ ~           ~ 2 0

To bookmark this query, right click on this link: simbad:objects in 2008A&A...491..131L and select 'bookmark this link' or equivalent in the popup menu