| Title | The warped Sb-galaxy NGC 4565. |
| Authors | Huchtmeier, W. K.; Seiradakis, J. H.; Tammann, G. A. |
| Bibcode | 1980A&A....89...95H Search ADS ↗ |
| Abstract | The distribution of the neutral hydrogen (H I) of the nearly edge-on-Sb-galaxy NGC 4565 has been observed with the 100 m radiotelescope. The H I extends to about twice the optical dimension (on the Palomar Observatory Sky Survey) being asymmetric like the optical galaxy. The H I-mass is asymmetric in the same sense with 20% more on the NW side than on the SE side of the galaxy. The H I distribution is symmetric to the first order; only in the outer part a considerable warp is observed reaching about 18 kpc at a distance of 100 kpc from the center. A flat rotation curve is compatible with the observations leading to a total mass of 10 to the 12th solar masses, the relative hydrogen content being 4%; M(H I)/L(B) equals 0.18, M(t)/L(B) equals 4.5. Thus the Sb galaxy NGC 4565 is among the largest (extent) and most massive of the relatively near spiral galaxies. |
| Objects | 3 Objects Search NED ↙ |
