Astronomy and Astrophysics – Astrophysics – Galaxy Astrophysics
Scientific paper
2010-02-05
Astronomy and Astrophysics
Astrophysics
Galaxy Astrophysics
5 pages, 5 figures. To appear in "Tumbling, twisting, and winding galaxies: Pattern speeds along the Hubble sequence", E. M. C
Scientific paper
In the 60's, Prof. Stroemgren proposed to use space velocities and ages of moderately young stars to compute their places of formation in order to study the spiral structure in the Galaxy. We have extended this idea to very young stellar clusters in nearby disk galaxies. Near-infrared (NIR) K-band images of grand-design spiral galaxies often show bright knots along their spiral arms. Such knots in NGC 2997 have been identified as massive stellar clusters with ages of less than 10 Myr using JHK photometry and K-band spectra. Ages of these clusters can be estimated from JHK photometry. Their azimuthal distances from the spiral arms, as measured in the K-band, correlates with their ages suggesting that the pattern speed of an underlying density wave can be derived. This method is tested on the grand-design spiral NGC 2997 using VLT data.
Dottori Horacio
Grosbol Preben
No associations
LandOfFree
Estimation of pattern speed using very young, stellar clusters 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 Estimation of pattern speed using very young, stellar clusters, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Estimation of pattern speed using very young, stellar clusters will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-536034