2023MNRAS.519.4221F

Query : 2023MNRAS.519.4221F

2023MNRAS.519.4221F - Mon. Not. R. Astron. Soc., 519, 4221-4240 (2023/March-1)

Spatially resolved properties of the ionized gas in the H II galaxy J084220+115000.

FERNANDEZ-ARENAS D., CARRASCO E., TERLEVICH R., TERLEVICH E., AMORIN R., BRESOLIN F., CHAVEZ R., GONZALEZ-MORAN A.L., ROSA-GONZALEZ D., MAYYA Y.D., VEGA O., ZARAGOZA-CARDIEL J., MENDEZ-ABREU J., IZAZAGA-PEREZ R., GIL DE PAZ A., GALLEGO J., IGLESIAS-PARAMO J., GARCIA-VARGAS M.L., GOMEZ-ALVAREZ P., CASTILLO-MORALES A., CARDIEL N., PASCUAL S. and PEREZ-CALPENA A.

Abstract (from CDS):

We present a spatially resolved spectroscopic study for the metal poor H II galaxy J084220+115000 using MEGARA Integral Field Unit observations at the Gran Telescopio Canarias. We estimated the gas metallicity using the direct method for oxygen, nitrogen, and helium and found a mean value of 12 + log (O/H) = 8.03 ± 0.06, and integrated electron density and temperature of ∼161 cm–3 and ∼15400 K, respectively. The metallicity distribution shows a large range of Δ(O/H) = 0.72 dex between the minimum and maximum (7.69 ± 0.06 and 8.42 ± 0.05) values, unusual in a dwarf star-forming galaxy. We derived an integrated log (N/O) ratio of -1.51 ± 0.05 and found that both N/O and O/H correspond to a primary production of metals. Spatially resolved maps indicate that the gas appears to be photoionized by massive stars according to the diagnostic line ratios. Between the possible mechanisms to explain the starburst activity and the large variation of oxygen abundance in this galaxy, our data support a possible scenario where we are witnessing an ongoing interaction triggering multiple star-forming regions localized in two dominant clumps.

Abstract Copyright: © 2023 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society

Journal keyword(s): H II regions - galaxies: dwarf - galaxies: individual: J084220+115000 - ISM-galaxies: starburst

Simbad objects: 19

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Number of rows : 19
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 ESO 350-38 Sy2 00 36 52.489 -33 33 17.23   14.31 14.41 13.49   ~ 450 0
2 6dFGS gJ010702.1-383152 H2G 01 07 02.16 -38 31 52.2   16.5       ~ 18 0
3 Mrk 996 Sy1 01 27 35.5248944352 -06 19 35.432857848 14.75 15.05 14.48 14.06 13.70 ~ 136 0
4 LEDA 8377 H2G 02 11 23.38 +02 20 29.7   18       ~ 43 0
5 SBSG 0335-052B G 03 37 44.04 -05 02 40.2   16.77 16.65   16.79 ~ 220 1
6 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
7 RMC 136 Cl* 05 38 42.396 -69 06 03.36   5.81 5.40     ~ 2236 2
8 NAME LMC 2 Supergiant Shell sh 05 41 27 -69 22.4           ~ 200 0
9 LEDA 3090963 H2G 08 42 20.941 +11 50 00.39           ~ 42 0
10 AGC 193816 LSB 09 21 27.172 +07 21 52.70           ~ 19 0
11 Mrk 116 AGN 09 34 02.1 +55 14 25           ~ 1179 1
12 Z 153-5 AG? 09 56 46.047 +28 49 43.77 14.82 14.74 14.59 14.55 26.509 ~ 252 1
13 Z 12-61 rG 11 42 12.253 +00 20 03.68   14.16 13.67 13.41 13.03 ~ 196 1
14 NGC 4449 EmG 12 28 11.118 +44 05 36.81 10.11 9.98 9.64 9.45   ~ 1192 1
15 NGC 5253 rG 13 39 55.990 -31 38 24.11 11.48 10.94 10.49 10.33 13.47 ~ 1421 4
16 Z 219-66 QSO 14 17 01.716 +43 30 13.52   15.6       ~ 181 0
17 Z 193-4 H2G 14 50 56.495 +35 34 18.27   14.5 14.83     ~ 212 0
18 NGC 6822 G 19 44 56.199 -14 47 51.29   18 8.1     ~ 1661 0
19 LEDA 85193 H2G 21 49 48.2196 -38 54 08.587           ~ 21 0

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