2020ApJ...891...25M

Query : 2020ApJ...891...25M

2020ApJ...891...25M - Astrophys. J., 891, 25-25 (2020/March-1)

Stellar feedback and resolved stellar IFU spectroscopy in the nearby spiral galaxy NGC 300.

McLEOD A.F., KRUIJSSEN J.M.D., WEISZ D.R., ZEIDLER P., SCHRUBA A., DALCANTON J.J., LONGMORE S.N., CHEVANCE M., FAESI C.M. and BYLER N.

Abstract (from CDS):

We present MUSE integral field unit (IFU) observations of five individual H II regions in two giant star-forming complexes in the low-metallicity, nearby dwarf spiral galaxy NGC 300. In combination with high spatial resolution Hubble Space Telescope photometry, we demonstrate the extraction of stellar spectra and classification of individual stars from ground-based IFU data at the distance of 2 Mpc. For the two star-forming complexes, in which no O-type stars had previously been identified, we find a total of 13 newly identified O-type stars and 4 Wolf-Rayet stars (two already-known sources and two Wolf-Rayet star candidates that this work has now confirmed). We use the derived massive stellar content to analyze the impact of stellar feedback on the H II regions. As already found for H II regions in the Magellanic Clouds, the dynamics of the analyzed NGC 300 H II regions are dominated by a combination of the pressure of the ionized gas and stellar winds. Moreover, we analyze the relation between the star formation rate and the pressure of the ionized gas as derived from small (<100 pc) scales, both quantities being systematically overestimated when derived on galactic scales. With the wealth of upcoming IFU instruments and programs, this study serves as a pathfinder for the systematic investigation of resolved stellar feedback in nearby galaxies, delivering the necessary analysis tools to enable massive stellar content and feedback studies sampling an unprecedented range of H II region properties across entire galaxies in the nearby universe.

Abstract Copyright: © 2020. The American Astronomical Society. All rights reserved.

Journal keyword(s): Intergalactic medium - Galactic and extragalactic astronomy - Stellar feedback - Massive stars - Young massive clusters - H II regions

Nomenclature: Fig. 5, Table 3: [MKW2020] 11N-N (Nos 118-1 to 118-4, 119-1 to 119-9). Fig. 5, Table 4: [MKW2020] 11N-WRN (Nos 118-WR1 to 118-WR2, 119-WR1 to 119-WR2).

Simbad objects: 34

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Number of rows : 34
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 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 12317 1
2 NGC 300 GiG 00 54 53.4465638304 -37 41 03.168402396 8.83 8.69 8.13 7.46   ~ 1614 2
3 [DCL88] 119C HII 00 55 02.87 -37 43 13.2           ~ 6 0
4 [BAT97] II 1 WR* 00 55 02.940 -37 43 15.96   22.0       WC 4 0
5 STWR 12 WR* 00 55 03.410 -37 42 42.14   22.3       WC7 5 0
6 [BL97] N300-H18 SNR 00 55 03.50 -37 42 46.0     17.44     ~ 22 2
7 [MKW2020] 118-3 * 00 55 03.610 -37 42 48.46           O 2 0
8 [MKW2020] 118-1 * 00 55 03.630 -37 42 49.05           O 2 0
9 [MKW2020] 119-5 * 00 55 03.670 -37 43 21.53           O 2 0
10 [MKW2020] 119-4 * 00 55 03.700 -37 43 19.42           O 2 0
11 [MKW2020] 119-3 * 00 55 03.730 -37 43 19.93           O 2 0
12 [MKW2020] 119-6 * 00 55 03.730 -37 43 19.79           O 2 0
13 [DCL88] 119A SNR 00 55 03.74 -37 43 18.3     16.70     ~ 19 2
14 [MKW2020] 119-9 * 00 55 03.770 -37 43 18.73           O 2 0
15 [MKW2020] 119-8 * 00 55 03.780 -37 43 18.91           O 2 0
16 [MKW2020] 118-WR1 WR* 00 55 03.780 -37 42 51.80     18.56     WC 3 0
17 [MKW2020] 119-2 * 00 55 03.840 -37 43 23.43           O 2 0
18 [MKW2020] 118-4 * 00 55 03.840 -37 42 43.12           O 2 0
19 [MKW2020] 119-1 * 00 55 03.850 -37 43 16.68           O 2 0
20 [DCL88] 119 HII 00 55 03.9 -37 43 20           ~ 5 0
21 [DCL88] 118 HII 00 55 04.05 -37 42 48.0           ~ 3 0
22 STWR 7 WR* 00 55 04.170 -37 43 18.91   20.2       WN7 6 0
23 [MKW2020] 118-2 * 00 55 04.240 -37 42 43.06           O 2 0
24 [MKW2020] 119-7 * 00 55 04.280 -37 43 15.83           O 2 0
25 [DCL88] 119B HII 00 55 04.28 -37 43 13.7           ~ 5 1
26 [DCL88] 118B HII 00 55 04.58 -37 42 49.2           ~ 7 0
27 M 74 G 01 36 41.7451236624 +15 47 01.107512304 10.52 10.00 9.46 9.16   ~ 1934 1
28 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 7988 0
29 LHA 120-N 44 EmO 05 22 06.9 -67 56 46           ~ 211 1
30 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
31 RMC 136 Cl* 05 38 42.396 -69 06 03.36   5.81 5.40     ~ 2236 2
32 LHA 120-N 180 HII 05 49 13 -70 06.4           ~ 36 0
33 CD-38 10980 WD* 16 23 33.8380498896 -39 13 46.161043572 9.916 10.885 11.029 10.936 10.841 DA2 526 0
34 Feige 110 HS* 23 19 58.3996844256 -05 09 56.171142864 10.360 11.45 11.50 11.970 12.145 sdO8VIIIHe5 673 1

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