2002A&A...385.1049T

Query : 2002A&A...385.1049T

2002A&A...385.1049T - Astronomy and Astrophysics, volume 385, 1049-1055 (2002/4-3)

Water maser emission in IC 342.

TARCHI A., HENKEL C., PECK A.B. and MENTEN K.M.

Abstract (from CDS):

The detection of 22GHz water vapor emission from IC 342 is reported, raising the detection rate among northern galaxies with IRAS point source fluxes S_100µm>50Jy to 16%. The maser, associated with a star forming region ∼10-15" west of the nucleus, consists of a single 0.5km/s wide feature and reaches an isotropic luminosity of 10^–2L_☉ (D=1.8Mpc). If the time variability is intrinsic, the maser size is ≲1.5x10¹⁶cm (≲0.5mas) which corresponds to a brightness temperature of >10⁹K. The linewidth, luminosity, and rapid variability are reminiscent of the 8km/s super maser in Orion-KL. A velocity shift of 1km/s within two weeks and subsequent rapid fading is explained in terms of a chance alignment of two dense molecular clouds. Observations at 22GHz toward Maffei 2 are also reported, yielding a 5σ upper limit of 25mJy for a channel spacing of 1.05km/s.

Abstract Copyright: ∼

Journal keyword(s): galaxies: individual: IC 342, Maffei 2 - galaxies: starburst - ISM: molecules - masers - lines: ISM radio

Simbad objects: 30

Full paper

View the references in ADS

Number of rows : 30

N	Identifier	Otype	ICRS (J2000) RA	ICRS (J2000) DEC	Mag U	Mag B	Mag V	Mag R	Mag I	Sp type	#ref 1850 - 2023	#notes
1	IC 10	G	00 20 25.50	+59 17 17.0		13.6	9.5			~	1102	1
2	NGC 253	SyG	00 47 33.134	-25 17 19.68		8.03		6.94	8.1	~	3261	2
3	M 33	GiG	01 33 50.8965749232	+30 39 36.630403128	6.17	6.27	5.72			~	5725	1
4	NAME W 3 OH	HII	02 27 04.1	+61 52 22						~	1008	2
5	[BE83] Maser 133.95+01.07	Mas	02 27 04.7	+61 52 26						~	4	0
6	4C 67.05	QSO	02 28 50.05148365	+67 21 03.0293322		19.5	19.50	18.1		~	247	1
7	UGCA 39	GiG	02 41 55.092	+59 36 14.73		16				~	343	1
8	M 77	GiP	02 42 40.7091669408	-00 00 47.859690204	9.70	9.61	8.87	10.1	9.9	~	4500	2
9	NAME Per Arm	PoG	03 30	+45.0						~	1477	0
10	Ass Cam OB 1	As*	03 31.6	+58 38						~	94	0
11	[BHJ77] I-3	Rad	03 46 00.8	+68 05 56						~	3	0
12	[BHJ77] I-4	HII	03 46 09.3	+68 09 01						~	3	0
13	NAME IC 342 H2O Maser	Mas	03 46 46	+68 05.7						~	1	0
14	IC 342	SBG	03 46 48.514	+68 05 45.98		10.5				~	1491	1
15	NAME Orion-KL	SFR	05 35 14.16	-05 22 21.5						~	2251	1
16	ICRF J054236.1+495107	Sy1	05 42 36.13789710	+49 51 07.2337139		18.45	17.80	17.210		~	1449	1
17	M 82	IG	09 55 52.430	+69 40 46.93	9.61	9.30	8.41			~	5767	6
18	NGC 3079	Sy2	10 01 57.8789863992	+55 40 47.449758324	11.57	11.54	10.86			~	1366	3
19	NAME NGC 3690 West	GiP	11 28 30.69	+58 33 33.4		11.8				~	628	4
20	NGC 3690	IG	11 28 31.0	+58 33 41		13.19	12.86			~	966	4
21	NAME NGC 3690 East	AGN	11 28 33.07	+58 33 54.2		11.8				~	630	4
22	M 51	GiP	13 29 52.698	+47 11 42.93		9.26	8.36	8.40		~	4248	4
23	IC 4553	SyG	15 34 57.22396	+23 30 11.6084		14.76	13.88			~	2918	4
24	NAME Sgr A Region	reg	17 45 12	-28 48.3						~	936	0
25	NAME Sgr B2	MoC	17 47 20.4	-28 23 07						~	2199	1
26	W 31a	Rad	18 10 28.3	-19 55 59						~	17	0
27	W 49n	HII	19 10 13.2	+09 06 12						~	461	3
28	W 49	SFR	19 10 20	+09 07.7						~	566	1
29	NAME TXFS 2226-1821	LIN	22 29 12.4915751904	-18 10 47.242352208		16.92		15.73		~	59	1
30	NAME Local Arm	reg	~	~						~	517	0

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