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- W2029333478 abstract "The galaxy PKS 1718 – 649 is at a distance of 82 Mpc (H0 =50 km/s/Mpc) and has a compact nuclear radio source with a monochromaticluminosity at 1415 MHz of |$2.6 times{10}^{24}$| W/Hz. There is a strong optical emission line spectrum which closely resembles that predicted by models of a gas heated by shock waves of moderate velocity ( ~ 100 km/s ). The prominent nuclear bulge is surrounded by spiral arms of very low surface brightness, suggesting classification as an SAB(s)bP-type galaxy. The linear Holmberg diameter is approximately 60 kpc. The galaxy has been detected in emission in the H I 21-cm line at a redshift which agrees with that measured from the optical absorption and emission lines. The 21-cm data yield an H I mass M(H I) = |$(27 pm 6)times{10}^{9},{M}_{odot}$| and an indicative mass |${M}_{i}=(450-130)times{10}^{9},{M}_{odot}$|. The luminosity derived from the 21-cm profile width via the Tully–Fisher relationship for nearby galaxies agrees with that obtained from the apparent magnitude and Hubble distance." @default.
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- W2029333478 date "1977-06-01" @default.
- W2029333478 modified "2023-10-17" @default.
- W2029333478 title "A radio and optical study of the galaxy PKS 1718 - 649" @default.
- W2029333478 doi "https://doi.org/10.1093/mnras/179.2.89" @default.
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