2005MNRAS.361L..20S

Query : 2005MNRAS.361L..20S

2005MNRAS.361L..20S - Mon. Not. R. Astron. Soc., 361, L20-L24 (2005/July-3)

The connection between shear and star formation in spiral galaxies.

SEIGAR M.S.

Abstract (from CDS):

We present a sample of 33 galaxies for which we have calculated (i) the average rate of shear from published rotation curves, (ii) the far-infrared luminosity from IRAS fluxes, and (iii) the K_s-band luminosity from the Two Micron All Sky Survey (2MASS). We show that a correlation exists between the shear rate and the ratio of the far-infrared to K_s-band luminosity. This ratio is essentially a measure of the star formation rate per unit mass, or the specific star formation rate. From this correlation we show that a critical shear rate exists, above which star formation would turn off in the discs of spiral galaxies. Using the correlation between shear rate and spiral arm pitch angle, this shear rate corresponds to the lowest pitch angles typically measured in near-infrared images of spiral galaxies.

Abstract Copyright: 2005 RAS

Journal keyword(s): galaxies: fundamental parameters - galaxies: spiral - infrared: galaxies

Simbad objects: 33

Full paper

View the references in ADS

Number of rows : 33

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 753	GiG	01 57 42.2040241440	+35 54 57.729210264		12.6		11.59		~	207	1
2	NGC 801	AGN	02 03 44.7926518608	+38 15 31.615649064		14.23	13.47			~	186	0
3	NGC 1024	AG?	02 39 11.9648991216	+10 50 48.592390416		13.8				~	99	0
4	NGC 1035	EmG	02 39 29.136	-08 08 01.11		12.89		13.0	12.6	~	188	1
5	NGC 1085	GiG	02 46 25.3115345424	+03 36 26.122717908		13.6				~	106	1
6	NGC 1357	Sy2	03 33 17.0545498128	-13 39 50.970066984		12.44		11.8	11.3	~	152	0
7	NGC 1417	GiG	03 41 57.4246773432	-04 42 17.534003508		12.9		12.09	12.1	~	126	0
8	NGC 1421	EmG	03 42 29.2806642840	-13 29 16.951034724		12.38				~	203	1
9	NGC 1620	GiG	04 36 37.3587737352	-00 08 36.824388684		12.5		12.1	12.2	~	147	0
10	Z 85-39	AG?	07 08 01.276	+15 10 42.36		13.4				~	78	0
11	IC 467	GiP	07 30 18.400	+79 52 20.99		12.7				~	127	0
12	NGC 2590	Sy2	08 25 02.0021287536	-00 35 29.142200148		14.0				~	81	0
13	NGC 2608	AG?	08 35 17.3298089184	+28 28 24.236326236		13.2				~	189	0
14	NGC 2639	Sy2	08 43 38.0682469032	+50 12 19.942091604	12.90	12.56	11.65			~	451	2
15	NGC 2742	GiG	09 07 33.5746410432	+60 28 45.818789124		12.0				~	214	0
16	NGC 2775	AG?	09 10 20.1334093488	+07 02 16.874157048		11.417	10.481	9.920	8.994	~	377	0
17	NGC 2815	Sy2	09 16 19.7483020320	-23 37 59.733390648		12.70	11.84	11.26	11.9	~	120	1
18	NGC 2844	GiG	09 21 48.0170367528	+40 09 04.472982288		13.6				~	131	0
19	NGC 2998	LIN	09 48 43.6305155160	+44 04 53.217027660		13.3				~	231	0
20	NGC 3223	Sy2	10 21 35.0831008008	-34 16 00.504571368		11.82	10.82	10.35	11.2	~	174	0
21	NGC 3281	Sy2	10 31 52.086	-34 51 13.40		12.62	14.02	11.17		~	392	1
22	NGC 3495	GiG	11 01 16.168	+03 37 40.93		13.10				~	160	0
23	NGC 3672	Sy2	11 25 02.4824415408	-09 47 43.360336932		11.9		10.80	11.6	~	202	1
24	IC 724	LIN	11 43 34.6616088960	+08 56 32.835152400		13.8				~	87	0
25	NGC 4378	Sy2	12 25 18.1024266072	+04 55 30.485595360		14.51	13.49			~	251	0
26	NGC 4682	GiG	12 47 15.5032131528	-10 03 48.130607628		12.9		11.97	12.6	~	104	0
27	Z 167-26	G	16 06 40.18179	+30 05 56.6421		14.4				~	126	0
28	NGC 6314	LIN	17 12 38.6880420672	+23 16 12.229407012	16.04	15.56	14.62	14.02	13.33	~	111	0
29	NGC 7083	Sy2	21 35 44.6351403840	-63 54 10.199544624		11.93	11.04	10.81	11.5	~	188	0
30	IC 1401	AG?	21 46 59.4920915040	+01 42 46.209746304		14.70				~	101	0
31	NGC 7171	Sy2	22 01 02.0124302736	-13 16 11.235583128		12.7		11.96	12.5	~	141	0
32	NGC 7217	LIN	22 07 52.3984675584	+31 21 33.632293572		12.94	11.92			~	511	0
33	Z 381-55	G	23 51 06.218	+01 03 23.57		14.4				~	120	0

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