On the dark halo of NGC 4565

Details On the dark halo of NGC 4565 On the dark halo of NGC 4565

Apr 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979a%26a....74..186d&link_type=abstract

Astronomy and Astrophysics, vol. 74, no. 2, Apr. 1979, p. 186-194.

Astronomy and Astrophysics

Astrophysics

18

Galactic Structure, Halos, Galactic Radiation, Luminous Intensity, Spectrum Analysis, Star Distribution

Scientific paper

It is shown that the recent optical photometric measurements of NGC 4565 (Hegyi and Gerber, 1977; Spinrad et al., 1978), which revealed faint K-type luminosity from the extended halo region, are consistent with a model in which the halo stellar population is an old normal nonregenerating population and that the dark halo mass can be mostly attributed to the unevolved 'Jupiters'. On fitting the observed luminosity, color and 21-cm rotation velocity measurements with a power-law stellar-mass spectrum, a power resembling the Salpeter function is found for a halo radius of about 18 kpc. At further distances (about 40 kpc) the spectrum is considerably steeper. The low-mass cut-off is of order 0.01 solar masses, independent of the color measurements, probably indicating some metal content during formation.

Affiliated with

Also associated with

No associations

Rating

On the dark halo of NGC 4565 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with On the dark halo of NGC 4565, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and On the dark halo of NGC 4565 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1434711