Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996aj....112.1636m&link_type=abstract
Astronomical Journal v.112, p.1636
Astronomy and Astrophysics
Astronomy
29
Hii Regions, Ism: Individual: Ngc 604, Ism: Individual: Ngc 588
Scientific paper
We have analyzed high spatial and spectral resolution Hα emission-line TAURUS data on two nearby giant H II regions, NGC 604 and NGC 588. Previous work shows that while NGC 604 is a relatively young system whose emission line kinematics is due to a combination of gravity and stellar wind-blown shells, NGC 588 seems more evolved, with its ionized gas kinematics dominated by large stellar wind shells. We show that for these two H II regions the distribution of points in the velocity dispersion (σ) vs intensity (I) diagram shows important differences probably due to their different evolutionary status. We suggest that this diagram is an excellent diagnostic to separate the main broadening mechanisms, i.e., those caused by shells and loops generated by massive stars, which finally lead to cloud dispersal, and gravitational broadening. We propose that the degree of evolution of giant H II regions, from formation to total dispersal of the ionized gas, can be tracked by means of their σ vs I diagrams.
Castañeda Héctor O.
Munoz-Tunon Casiana
Tenorio-Tagle Guillermo
Terlevich Roberto
No associations
LandOfFree
Supersonic Line Broadening and the Gas Dynamical Evolution of Giant HII Regions 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 Supersonic Line Broadening and the Gas Dynamical Evolution of Giant HII Regions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Supersonic Line Broadening and the Gas Dynamical Evolution of Giant HII Regions will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1212228