Astronomy and Astrophysics – Astronomy
Scientific paper
May 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998aas...192.4008h&link_type=abstract
American Astronomical Society, 192nd AAS Meeting, #40.08; Bulletin of the American Astronomical Society, Vol. 30, p.870
Astronomy and Astrophysics
Astronomy
Scientific paper
The ionization source of the diffuse ionized gas (DIG) in spiral galaxies remains a subject of debate. The energetics require that OB stars are the main source of the ionization, but if these stars are within HII regions, then a significant population of density bounded HII regions is required. A possible alternative is that massive stars outside of HII regions may ionize the DIG. We present a study of the massive stars and ionized gas in the nearby spiral galaxy M33. We analyze archival HST WFPC2 images in U, B, V, and FUV filters, along with UV images from the Ultraviolet Imaging Telescope and ground-based Hα images. We compare the FUV flux from stars in HII regions and DIG with the Hα flux and compare with models of evolving stellar population. The UV/Hα ratio in the DIG is consistent with a >= 5 Myr burst population or a steady state population. We have also constructed color-magnitude diagrams for massive stars in both environments, in order to directly compare the population of ionizing stars in DIG with that in HII regions.
Flynn J. L.
Hoopes Charles G.
Walterbos Reinirus Antonius Maria
No associations
LandOfFree
Massive Stars and the Ionization of the Diffuse Ionized Gas in M33 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 Massive Stars and the Ionization of the Diffuse Ionized Gas in M33, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Massive Stars and the Ionization of the Diffuse Ionized Gas in M33 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1364619