Discovery of an obscured low luminosity active nucleus in the spiral galaxy NGC 4258

Details Discovery of an obscured low luminosity active nucleus in the spiral galaxy NGC 4258 Discovery of an obscured low luminosity active nucleus in the spiral galaxy NGC 4258

Jun 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994pasj...46l..77m&link_type=abstract

PASJ: Publications of the Astronomical Society of Japan, vol. 46, no. 3, p. L77-L80

Astronomy and Astrophysics

Astronomy

110

Absorption Spectra, Active Galactic Nuclei, Seyfert Galaxies, Spiral Galaxies, Luminosity, X Ray Imagery, X Ray Spectra

Scientific paper

The spectra and images of the nearby jet galaxy NGC 4258 (M106) obtained with ASCA indicate presence of several distinct X-ray emission components. The emission above 3 keV is pointlike and coincident in position with the optical nucleus, exhibiting a hard (photon index approximately 1.78) and absorbed NH approximately 1.5 x 1023 cm-2 spectrum. This provides clear evidence that NGC 4258 hosts an obscured active nucleus of low luminosity, about 4 x 1040 ergs s-1 in 2-10 keV after removing the absorption. Iron K-line emission with an equivalent width 0.25 +/- 0.10 keV was detected. The emission below 1 keV is dominated by an extended approximately 4 min thin-thermal component with a temperature approximately 0.5 keV exhibiting atomic emission lines, possibly associated with the jet. There exists a third continuum component with an intermediate spectral hardness, which is brightest at approximately 1 min south-east of the nucleus.

Affiliated with

Also associated with

No associations

Rating

Discovery of an obscured low luminosity active nucleus in the spiral galaxy NGC 4258 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 Discovery of an obscured low luminosity active nucleus in the spiral galaxy NGC 4258, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Discovery of an obscured low luminosity active nucleus in the spiral galaxy NGC 4258 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1507126