The nature of near-infrared emission from spiral galaxies

P. A. James, M. S. Seigar

Research output: Contribution to journalArticlepeer-review

21 Scopus citations

Abstract

We present K-band spectroscopy for several regions of three nearby spiral galaxies, NGC 613, NGC 628 and NGC 7741. Analysis of the depth of the 2.293 μm CO absorption feature in these spectra reveals that some regions have deep absorptions, indicative of recent star formation, while others have anomalously shallow absorptions. We interpret the latter as evidence for a significant but localised contribution to the 2.3 μm light from hot dust with an effective temperature of ∼ 1000 K, which could have a significant effect on the K-band morphologies of star-forming galaxies.

Original languageEnglish (US)
Pages (from-to)791-796
Number of pages6
JournalAstronomy and Astrophysics
Volume350
Issue number3
StatePublished - Dec 1 1999

Keywords

  • Galaxies: individual: NGC 613
  • Galaxies: individual: NGC 7741
  • Galaxies: individual; M 74
  • Galaxies: spiral
  • Galaxies: stellar content

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