The radial metallicity gradient and the history of elemental enrichment in M 81 through emission-line probes

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Volume 567 (July 2014)

A&A, 567 (2014) A88

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Table 2

Regions with spectroscopy.

Region	α	δ	Alias^a	Lines	Abun.
Field 1

1F1	148.753	69.218	...	Y	Y
2F1	148.816	69.225	[MPC2001] 33	Y	U
3F1	148.812	69.211	[IW2001] P32	Y	Y
4F1^b	148.741	69.2231	...	Y	U
5F1 ^c	148.781	69.232	...	Y	N
6F1 ^d	148.808	69.213	...	Y	N
7F1^b	148.748	69.221	...	Y	N
8F1	148.876	69.212	...	Y	N
9F1	148.858	69.199	PSK 213	Y	N
10F1	148.908	69.201	PSK 249	Y	U
11F1	148.843	69.161	...	Y	U
12F1	148.804	69.180	[PR95] 51114	Y	U
13F1^e	148.942	69.183	PSK 279	Y	Y
14F1	148.925	69.181	...	Y	N
15F1	148.843	69.192	...	N	N
16F1^c	148.755	69.166	...	N	N
17F1	148.891	69.164	...	Y	N
18F1	148.792	69.171	...	Y	N
19F1^f	148.828	69.168	PSK 185	Y	Y
20F1	148.787	69.17	...	Y	N
21F1	148.764	69.190	PSK 122	Y	Y
22F1	148.735	69.176	[PR95] 51109	Y	N
23F1	148.902	69.158	...	Y	N
24F1	148.830	69.157	PSK 186	Y	U
25F1	148.904	69.152	PSK 246	Y	Y
26F1	148.877	69.147	...	Y	N
27F1	148.793	69.146	[IW2001] P30	Y	U

Field 2

1F2	148.703	69.135	PSK 47	Y	Y
2F2	148.815	69.137	PSK 171	Y	Y
3F2	148.727	69.137	...	Y	N
4F2	148.832	69.126	PSK 189	Y	U
5F2	148.731	69.121	PSK 87	Y	N
6F2	148.665	69.125	...	Y	N
7F2	148.705	69.131	...	N	N
8F2	148.744	69.132	...	Y	Y
9F2	148.769	69.114	PSK 128	Y	N
10F2	148.748	69.117	...	Y	N
11F2	148.693	69.112	...	Y	Y
12F2	148.766	69.107	PSK 125	Y	N
13F2^g	148.764	69.099	PSK124	Y	N
14F2	148.820	69.095	...	Y	N
15F2	148.723	69.105	...	Y	N
16F2	148.853	69.084	[PR95] 50645	N	N
17F2	148.768	69.091	...	Y	N
18F2	148.802	69.087	[MPC2001] 21	N	N
19F2	148.714	69.073	PSK 63	Y	Y
20F2	148.685	69.077	...	Y	N
21F2	148.648	69.082	...	Y	N
22F2	148.734	69.069	...	Y	N
23F2	148.774	69.070	...	N	N
24F2	148.702	69.085	PSK 45	Y	Y
25F2	148.769	69.076	...	Y	N
26F2	148.841	69.059	[PR95] 50476	Y	N
27F2^g	148.836	69.063	MPC2011 42	Y	U
28F2	148.698	69.059	[PR95] 50475	Y	Y
29F2	148.782	69.055	[PR95] 50451	Y	N

Notes.

^(a)

[MPC2001]: Magrini et al (2001); [IW2001]: Immler & Wang (2001); PSK: Petit et al. (1988); [PR95]: Perelmuter & Racine (1995).

^(b)

Hα emission is saturated;

^(c)

Considerable difference between B600 and R400 fluxes (~50%);

^(d)

Reddening correction not available;

^(e)

Hβ or Hα have a non-Gaussian shape;

^(f)

Emission line diagnostics indicate that it might be a PN;

^(g)

This target shows a WR-type spectrum with stellar emission lines at λ4658 and λ5812, and C IV features.

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