2012ApJ...760...37Z


Query : 2012ApJ...760...37Z

2012ApJ...760...37Z - Astrophys. J., 760, 37 (2012/November-3)

HALOGAS: H I observations and modeling of the nearby edge-on spiral galaxy NGC 4565.

ZSCHAECHNER L.K., RAND R.J., HEALD G.H., GENTILE G. and JOZSA G.

Abstract (from CDS):

We present 21 cm observations and models of the neutral hydrogen in NGC 4565, a nearby, edge-on spiral galaxy, as part of the Westerbork Hydrogen Accretion in LOcal GAlaxieS survey. These models provide insight concerning both the morphology and kinematics of H I above, as well as within, the disk. NGC 4565 exhibits a distinctly warped and asymmetric disk with a flaring layer. Our modeling provides no evidence for a massive, extended H I halo. We see evidence for a bar and associated radial motions. Additionally, there are indications of radial motions within the disk, possibly associated with a ring of higher density. We see a substantial decrease in rotational velocity with height above the plane of the disk (a lag) of -40+5_- 20_ km/s/kpc and -30+5_- 30_ km/s/kpc in the approaching and receding halves, respectively. This lag is only seen within the inner ∼4'.75 (14.9 kpc) on the approaching half and ∼4'.25 (13.4 kpc) on the receding half, making this a radially shallowing lag, which is now seen in the H I layers of several galaxies. When comparing results for NGC 4565 and those for other galaxies, there are tentative indications of high star formation rate per unit area being associated with the presence of a halo. Finally, H I is found in two companion galaxies, one of which is clearly interacting with NGC 4565.

Abstract Copyright:

Journal keyword(s): galaxies: halos - galaxies: individual: NGC 4565 - galaxies: kinematics and dynamics - galaxies: spiral - galaxies: structure

Simbad objects: 14

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Number of rows : 14
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 M 31 G 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 11447 1
2 UGC 1281 LSB 01 49 31.71 +32 35 16.2   13.0       ~ 146 0
3 NGC 891 H2G 02 22 32.907 +42 20 53.95 11.08 10.81 9.93 7.86   ~ 1567 2
4 NGC 2403 AGN 07 36 51.396 +65 36 09.17 9.31 8.84 8.38 8.19   ~ 1654 1
5 NGC 3044 G 09 53 40.884 +01 34 46.74   12.7   12.7 12.3 ~ 205 1
6 NGC 4244 GiG 12 17 29.659 +37 48 25.60   10.71   9.99   ~ 522 1
7 UGC 7321 EmG 12 17 34.021 +22 32 23.35   14.07   13.21   ~ 236 0
8 NGC 4562 GiG 12 35 34.5667925418 +25 50 58.393117212   14.6       ~ 76 0
9 NGC 4559 H2G 12 35 57.6399424116 +27 57 35.859639262   10.46 10.01     ~ 557 1
10 IC 3571 G 12 36 19.991 +26 05 01.58           ~ 21 0
11 NGC 4565 LIN 12 36 20.804 +25 59 14.61   13.61 12.43     ~ 898 0
12 NGC 5746 GiP 14 44 56.005 +01 57 17.06   12.3       ~ 332 0
13 NGC 5775 GiP 14 53 57.653 +03 32 40.10   13.0 11.34     ~ 407 2
14 NGC 5906 GiG 15 15 53.687 +56 19 43.86   11.4       ~ 705 1

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2021.09.27-18:01:45

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