2007PASJ...59..703D

Query : 2007PASJ...59..703D

2007PASJ...59..703D - Publ. Astron. Soc. Jap., 59, 703-709 (2007/August-0)

Japanese VLBI network observations of radio-loud narrow-line Seyfert 1 galaxies.

DOI A., FUJISAWA K., INOUE M., WAJIMA K., NAGAI H., HARADA K., SUEMATSU K., HABE A., HONMA M., KAWAGUCHI N., KAWAI E., KOBAYASHI H., KOYAMA Y., KUBOKI H., MURATA Y., OMODAKA T., SORAI K., SUDOU H., TAKABA H., TAKASHIMA K., TAKEDA K., TAMURA S. and WAKAMATSU K.-I.

Abstract (from CDS):

begin{HTML}We performed phase-reference very long baseline interferometry (VLBI) observations on five radio-loud narrow-line Seyfert 1 galaxies (NLS1s) at 8.4 GHz with the Japanese VLBI Network. Each of the five targets (RXS J08066+7248, RXS J16290+4007, RXS J16333+4718, RXS J16446+2619, and B3 1702+457) in milli-Jansky levels were detected and unresolved in milli-arcsecond resolutions, i.e., with brightness temperatures higher than 10⁷K. The nonthermal processes of active galactic nucleus activity, rather than starbursts, are predominantly responsible for the radio emissions from these NLS1s. Out of the nine known radio-loud NLS1s, including those chosen for this study, we found that the four most radio-loud objects exclusively have inverted spectra. This suggests a possibility that these NLS1s are radio-loud due to Doppler beaming, which can apparently enhance both the radio power and the spectral frequency.

Abstract Copyright: ∼

Journal keyword(s): galaxies: active - galaxies: jets - galaxies: Seyfert - radio continuum: galaxies - techniques: interferometric

Simbad objects: 26

Full paper

View the references in ADS

Number of rows : 26

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	2MASS J00445912+1921412	Sy1	00 44 59.1277028184	+19 21 41.244352128			16.1			~	37	0
2	2MASS J01341690-4258262	Sy1	01 34 16.9072341600	-42 58 26.223391344		18.17	17.30	16.71		~	81	1
3	M 77	Sy2	02 42 40.7091669408	-00 00 47.859690204	9.70	9.61	8.87	10.1	9.9	~	4897	2
4	QSO B0558-5026	BLL	05 59 47.3916612936	-50 26 52.025952120		15.18	14.97			~	307	1
5	NVSS J075445+714056	Rad	07 54 45.49923431	+71 40 56.7358292						~	12	1
6	LEDA 3095785	Sy1	08 06 38.9574958032	+72 48 20.403834696		15.9				~	28	1
7	8C 0802+733	Bla	08 08 16.49154497	+73 15 11.9897583				20.30		~	36	1
8	QSO J0948+0022	Bla	09 48 57.32005819	+00 22 25.5596984		18.85	18.61	18.17		~	350	2
9	SN 1993J	SN*	09 55 24.77476	+69 01 13.7026		10.8	12.0			SNIIb	1507	1
10	SN 1988Z	SN*	10 51 50.10	+16 00 00.5		16.8				SNIIn	385	1
11	NGC 4253	Sy1	12 18 26.5163572920	+29 48 46.531535472		14.34	13.57			~	1106	1
12	NGC 5506	Bla	14 13 14.8761010056	-03 12 27.556909272		15.25	14.38			~	1173	1
13	7C 162123.89+391619.00	Bla	16 23 07.6225499136	+39 09 32.410546992		17.41	17.21	16.10		~	97	1
14	4C 41.32	Bla	16 25 57.66971273	+41 34 40.6292008			22	21.73		~	171	1
15	[VV98] J162837.6+473410	QSO	16 28 37.5052485168	+47 34 10.423781868		21.39	20.85			~	38	1
16	2MASS J16290130+4007599	Bla	16 29 01.3106358000	+40 07 59.905936776		18.23	18.00	17.2		~	111	0
17	2MASX J16332357+4718588	Sy1	16 33 23.5812109560	+47 18 58.936241628		17.77	17.35			~	88	1
18	4C 47.44	Bla	16 37 45.13055568	+47 17 33.8311081		17.5		18.69		~	183	1
19	6C 163852+395305	Bla	16 40 29.63277140	+39 46 46.0284071		18.4	19.37	18.75		~	336	2
20	7C 164055.20+534559.00	Sy1	16 42 00.5603239320	+53 39 50.603024736		17.82	17.04			~	16	1
21	[VV2000] J164240.4+252307	Bla	16 42 40.4116160856	+25 23 07.683525492		18.82	18.66	17.5		~	59	1
22	QSO J1644+2619	Bla	16 44 42.5339200680	+26 19 13.227002976		18.80	18.42			~	114	1
23	6C 170204+454510	Sy1	17 03 30.3824218008	+45 40 47.166180564		16.0				~	170	2
24	NVSS J170348+455936	Rad	17 03 48.299	+45 59 35.24						~	3	1
25	4C 45.34	Bla	17 07 17.7533536464	+45 36 10.552931460		17.18	17.01	17		~	79	1
26	Z 495-18	Sy1	22 42 39.3363009144	+29 43 31.302092640		14.86	14.16			~	748	1

To bookmark this query, right click on this link: simbad:objects in 2007PASJ...59..703D and select 'bookmark this link' or equivalent in the popup menu