2005A&A...439..947B


C.D.S. - SIMBAD4 rel 1.7 - 2020.08.14CEST14:32:36

2005A&A...439..947B - Astronomy and Astrophysics, volume 439, 947-956 (2005/9-1)

Extra-planar gas in the spiral galaxy NGC 4559.

BARBIERI C.V., FRATERNALI F., OOSTERLOO T., BERTIN G., BOOMSMA R. and SANCISI R.

Abstract (from CDS):

We present 21-cm line observations of the spiral galaxy NGC 4559, made with the Westerbork Synthesis Radio Telescope. We have used them to study the HI distribution and kinematics, the relative amount and distribution of luminous and dark matter in this galaxy and, in particular, the presence of extra-planar gas. Our data do reveal the presence of such a component, in the form of a thick disk, with a mass of 5.9x108M (one tenth of the total HI mass) and a mean rotation velocity 25-50km/s lower than that of the thin disk. The extra-planar gas may be the result of galactic fountains but accretion from the IGM cannot be ruled out. With this study we confirm that lagging, thick HI layers are likely to be common in spiral galaxies.

Abstract Copyright:

Journal keyword(s): galaxies: halos - galaxies: individual: NGC 4559 - galaxies: ISM - galaxies: kinematics and dynamics

Simbad objects: 6

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Number of rows : 6

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 NGC 891 H2G 02 22 32.907 +42 20 53.95 11.08 10.81 9.93 7.86   ~ 1526 2
2 NGC 2403 AGN 07 36 51.396 +65 36 09.17 9.31 8.84 8.38 8.19   ~ 1613 1
3 UGC 7321 EmG 12 17 34.021 +22 32 23.35   14.07   13.21   ~ 226 0
4 SN 1941A SN* 12 35 55 +27 58.0   13.2 13.2     SNIIL 38 1
5 NGC 4559 H2G 12 35 57.6399424117 +27 57 35.859639262   10.46 10.01     ~ 534 1
6 NGC 5775 GiP 14 53 57.653 +03 32 40.10   13.0 11.34     ~ 392 2

    Equat.    Gal    SGal    Ecl

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2020.08.14-14:32:36

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