2003A&A...404..969D

Query : 2003A&A...404..969D

2003A&A...404..969D - Astronomy and Astrophysics, volume 404969-974 (2003/6-4)

Determination of temperature of the ionizing stars of HII regions.

DORS O.L.Jr and COPETTI M.V.F.

Abstract (from CDS):

The determination of temperature (T_eff) of the ionizing stars of HII regions was considered. In this work we used photoionization models for HII regions ionized by a single star to show that the index R=log([OII]λλ3726+3729/[OIII]λ5007) can be used to estimate T_eff. The relation R vs. T_eff proved to be rather independent of the chemical abundances, but strongly dependent on the ionization parameter of the nebula. In order to check the reliability of using R for temperature determination, we compared the values of T_eff obtained via the index R for a sample of HII regions with data available in the literature with independent estimations.

Abstract Copyright: ∼

Journal keyword(s): ISM: HII regions - stars: fundamental parameters - stars: early-type

Simbad objects: 47

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Number of rows : 47

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	NGC 346	Cl*	00 59 04.4000	-72 10 39.000						~	547	0
2	HD 5980	WR*	00 59 26.5838833944	-72 09 53.927337312		11.13	11.31		11.029	WN4+O7I:	419	1
3	SH 2-212	HII	04 40 36.52	+50 27 44.3						~	102	2
4	NGC 1763	As*	04 56 51.5	-66 24 25			9.40			~	169	3
5	LHA 120-N 44	EmO	05 22 06.9	-67 56 46						~	211	1
6	LHA 120-N 138B	EmO	05 24 12.4926087864	-68 30 06.343860168						~	8	0
7	OGLE LMC-ECL-14757	Y*O	05 24 14.00	-68 29 49.2			18.538		18.150	~	15	0
8	LHA 120-N 51D	HII	05 25 17.3	-67 22 47						~	119	0
9	LHA 120-N 144	HII	05 26 42.5	-68 49 34						~	72	0
10	NGC 1931	OpC	05 31 23	+34 14.0			10.1			~	136	0
11	NGC 2020	EmO	05 33 10.6	-67 42 45						~	34	0
12	M 42	HII	05 35 16.8	-05 23 15						~	4411	0
13	NAME Ori A	MoC	05 38	-07.1						~	3187	0
14	NAME 30 Dor Nebula	SFR	05 38 36.0	-69 05 11						~	1276	2
15	LHA 120-N 70	HII	05 43 17.5	-67 50 48						~	85	0
16	LHA 120-N 180	HII	05 49 13	-70 06.4						~	36	0
17	SH 2-257	HII	06 12 43.57	+17 59 33.1						~	135	1
18	MMB G192.600-00.048	Y*O	06 12 54.0100	+17 59 23.200						~	430	0
19	IC 2162	HII	06 13 04.1	+17 58 44						~	372	2
20	IRAS 06121+1221	Cld	06 14 59.4	+12 20 16						~	42	0
21	SH 2-271	HII	06 15.2	+12 22						~	86	1
22	NAME Rosette Nebula	HII	06 32 26.76	+04 47 37.1						~	522	1
23	IC 466	HII	07 08 37	-04 18.8						~	49	0
24	SH 2-301	HII	07 09 54.3	-18 29 53						~	51	0
25	NGC 2359	HII	07 18 30.000	-13 13 36.00						~	170	0
26	SH 2-305	HII	07 30 04.1	-18 32 13						~	55	0
27	SH 2-307	HII	07 35 33	-18 45.6						~	61	2
28	NGC 2467	OpC	07 52 18	-26 25.7						~	190	1
29	DCld 264.3+01.5	DNe	08 54 42	-42 54.8						~	68	0
30	RCW 34	HII	08 56 28.1	-43 05 58		10.5	11.21			~	99	0
31	V* V391 Vel	Or*	08 56 28.109952	-43 05 55.40028	12.61	12.71	11.73	11.50		O8/8.5V	83	1
32	GUM 25	HII	09 02 21.3	-48 41 55						~	30	0
33	NGC 3199	HII	10 16 32.8	-57 56 02						~	70	1
34	NGC 3372	HII	10 45 02.23	-59 41 59.8						~	1071	2
35	NGC 3603	OpC	11 14 57.9	-61 14 32						~	1136	1
36	IC 2944	OpC	11 38 20.00	-63 22 22.0						~	191	0
37	M 101	GiP	14 03 12.583	+54 20 55.50		8.46	7.86	7.76		~	3138	2
38	M 8	OpC	18 03 37	-24 23.2						~	644	1
39	M 16	OpC	18 18 45.1	-13 47 31						~	1084	1
40	NGC 6618	OpC	18 20 47	-16 10.3						~	1700	0
41	LBN 070.13+01.71	HII	20 00 53.25	+33 29 26.0		13.79	12.86			~	57	2
42	LBN 070.24+01.53	HII	20 01 44.7	+33 31 14						~	40	1
43	SH 2-148	HII	22 56 18.0	+58 31 00						~	70	0
44	SH 2-152	HII	22 58 40.8107767416	+58 46 59.226036024						~	147	1
45	IC 1470	HII	23 05 09.9	+60 14 31		11.5				~	180	2
46	NGC 7538	OpC	23 13 37	+61 30.0						~	920	1
47	NGC 7635	HII	23 20 48.3	+61 12 06						~	179	2

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