1997A&A...325..961K


Query : 1997A&A...325..961K

1997A&A...325..961K - Astronomy and Astrophysics, volume 325, 961-971 (1997/9-3)

The star formation law in disk galaxies: a Bayesian view.

KOEPPEN J. and FROEHLICH H.-E.

Abstract (from CDS):

The dependence of the star formation rate {PSI}∝gx/ry on gas surface density g and galactocentric radius r are studied in disk galaxies. The sample includes the Milky Way galaxy and 11 nearby Sb and Sc galaxies with known radial gas surface densities and Hα surface brightnesses, used as a measure of the SFR. The Bayesian approach permits to compute genuine probabilities for the validity of several different functional forms. We do not find any significant explicit dependence of the SFR on radius. A linear dependence on gas density {PSI}∝g is found to be an order of magnitude more probable than any universal non-linear law. If each galaxy has its own exponent x, the non-linear law {PSI}∝gx would also be highly probable. These findings are fairly independent of the CO-H2 conversion recipe used.

Abstract Copyright:

Journal keyword(s): methods: data analysis - methods: statistical - stars: formation - Galaxy: structure - galaxies: ISM - galaxies: spiral

Simbad objects: 11

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Number of rows : 11
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 NGC 2841 LIN 09 22 02.6778711696 +50 58 35.737082868 10.43 10.09 9.22     ~ 1024 1
2 M 99 H2G 12 18 49.625 +14 24 59.36 10.45 10.44 9.87     ~ 839 2
3 M 61 Sy2 12 21 54.9282582888 +04 28 25.597367184 10.07 10.18 9.65     ~ 936 2
4 M 100 AGN 12 22 54.9299993592 +15 49 20.296257960 10.04 10.05 9.35     ~ 1739 2
5 NGC 4535 H2G 12 34 20.3443516704 +08 11 51.908488116   11.1       ~ 566 0
6 NGC 4654 GiP 12 43 56.638 +13 07 34.86   11.8       ~ 535 1
7 NGC 4689 H2G 12 47 45.5568088416 +13 45 46.135889100   12.8       ~ 361 0
8 M 94 SyG 12 50 53.0737971432 +41 07 12.900884628 9.15 8.96 8.24 7.78   ~ 1302 2
9 M 51 GiP 13 29 52.698 +47 11 42.93   9.26 8.36 8.40   ~ 4061 4
10 M 101 GiP 14 03 12.583 +54 20 55.50   8.46 7.86 7.76   ~ 2701 2
11 NGC 6946 H2G 20 34 52.332 +60 09 13.24   10.5       ~ 2372 2

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2022.05.24-01:10:51

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