Deep Hi imaging of NGC 6946, a new view on bubbles and high velocity gas

Details Deep Hi imaging of NGC 6946, a new view on bubbles and high velocity gas Deep Hi imaging of NGC 6946, a new view on bubbles and high velocity gas

May 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aas...200.4203b&link_type=abstract

American Astronomical Society, 200th AAS Meeting, #42.03; Bulletin of the American Astronomical Society, Vol. 34, p.708

Astronomy and Astrophysics

Astronomy

2

Scientific paper

The last few years have brought new insight into the disk-halo connection in spiral galaxies. Chandra and Hi observations of nearly edge-on galaxies have shown that the halo is far from empty, but it contains, compared to the disk, a substantial amount of gas. It is still unclear how exactly this gas is brought into the halo. Studies on face-on galaxies have provided more information about the vertical motions of the gas, but lack of sensitivity has lead to an incomplete observational basis. We re-observed the nearby face-on spiral galaxy NGC 6946 in which widespread high velocity Hi has already been detected. We present the first results of recently obtained Hi data taken with the upgraded Westerbork Synthesis Radio Telescope. Although so far only a subset of the total observations requested has been analysed, these data already go twice as deep as the earlier observations of NGC 6946. Hi with vertical velocities as high as 100 km/s appear at radii within the bright optical disk. This gas shows a filamentary structure and could well be the extragalactic counterpart of our Galaxy's IVCs. The disk consists of many holes of which one, having a radius of about 1-2 kpc, appears to be empty also in the radio continuum, IR and Hα . At the location of the hole no source has been detected. We discuss all these features we have found and outline what we expect to learn from them.

Affiliated with

Also associated with

No associations

Rating

Deep Hi imaging of NGC 6946, a new view on bubbles and high velocity gas 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 Deep Hi imaging of NGC 6946, a new view on bubbles and high velocity gas, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Deep Hi imaging of NGC 6946, a new view on bubbles and high velocity gas will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1718691