Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004apj...615l..89s&link_type=abstract
The Astrophysical Journal, Volume 615, Issue 2, pp. L89-L92.
Astronomy and Astrophysics
Astronomy
4
Galaxies: Abundances, Galaxies: Individual: Ngc Number: Ngc 6090, Galaxies: Interactions, Galaxies: Ism, Galaxies: Starburst
Scientific paper
By obtaining integral field spectra of the interacting galaxy system NGC 6090, we have found a kiloparsec-scale region where active star formation is currently increasing the fraction of heavy elements. Young massive starbursts are occurring in regions offset from the galactic centers, highlighting the present epoch of metal enrichment over the previous ones usually seen at galactic centers. The short timescale of ~107 yr for the starbursts, inferred from the galactic rotation, provides a strong constraint on the origins of the metallicity/abundance enhancements. While oxygen is considered to originate in supernovae, the observed nitrogen enhancement is likely to be caused by winds/mass loss from massive stars rather than being a product of intermediate-mass stars.
Hattori Takeshi
Hayashi Tadashi
Ishigaki Tsuyoshi
Ishii Makoto
Kawai Atsushi
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