Radial Dependence in the Pattern Speed of M51

Details Radial Dependence in the Pattern Speed of M51 Radial Dependence in the Pattern Speed of M51

Dec 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...211.1307m&link_type=abstract

American Astronomical Society, AAS Meeting #211, #13.07; Bulletin of the American Astronomical Society, Vol. 39, p.755

Astronomy and Astrophysics

Astronomy

Scientific paper

We investigate evidence for radial variation in the pattern speed of the grand design spiral M51 using the Radial Tremaine-Weinberg (TWR) method. We implement the method on CO observations (from Shetty et al. 2007) tracing the disk-dominant molecular component. Results from the method's numerical implementation--combined with regularization which smooths intrinsically noisy solutions--indicate at least two distinct patterns speeds, with the inner speed significantly larger than the conventially adopted global value. We also find evidence inside r=45" for an additional pattern speed and consider it's detection in light of the recent results of Shetty et al. (2007). As for the original TW method, uncertainty in the major axis position angle (PA) is the largest source of error in the calculation; in this study, where δ_PA=± 5°, this establishes 20% error on our measurements.

Affiliated with

Also associated with

No associations

Rating

Radial Dependence in the Pattern Speed of M51 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 Radial Dependence in the Pattern Speed of M51, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Radial Dependence in the Pattern Speed of M51 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1474903