The Abundance Distribution In M31 From Optical Spectroscopy Of HII Regions And Planetary Nebulae

Details The Abundance Distribution In M31 From Optical Spectroscopy Of HII Regions And Planetary Nebulae The Abundance Distribution In M31 From Optical Spectroscopy Of HII Regions And Planetary Nebulae

Jan 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21541533s&link_type=abstract

American Astronomical Society, AAS Meeting #215, #415.33; Bulletin of the American Astronomical Society, Vol. 36, p.1113

Astronomy and Astrophysics

Astronomy

Scientific paper

We present the largest existing full-wavelength optical spectroscopic sample of HII regions and planetary nebulae in Andromeda. We have collected spectra with the Hectospec multi-fiber spectrograph of the 6.5m MMT. We use strong line ratios to determine the radial oxygen abundance gradient in the galaxy. Such gradients are useful in constraining models of the chemical evolution of spiral galaxies; particularly the radial variation in gas infall and star formation rate. The resulting HII region abundance estimates cover the range from about 4 to 20 kpc in radius in the disk, with a sample size more than twice as large as any previous study. A linear fit to the gradient indicates roughly solar abundances at 20 kpc and twice solar in the inner region, in good agreement with past observations. The planetary nebulae sample extends from 0 to about 25 kpc, with limited coverage at larger distances; a range much larger than any previous study and a sample size several times more numerous. We report trends in the extinction of both the HII regions and planetary nebulae and estimate oxygen abundances for several planetary nebulae in the dwarf satellite NGC205. This work is supported in part by the NSF REU and DOD ASSURE programs under NSF grant no. 0754568 and by the Smithsonian Institution.

Affiliated with

Also associated with

No associations

Rating

The Abundance Distribution In M31 From Optical Spectroscopy Of HII Regions And Planetary Nebulae 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 The Abundance Distribution In M31 From Optical Spectroscopy Of HII Regions And Planetary Nebulae, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Abundance Distribution In M31 From Optical Spectroscopy Of HII Regions And Planetary Nebulae will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-966562