The interstellar extinction towards the milky way bulge with planetary nebulae, red clump, and RR lyrae stars

David M. Nataf*

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    5 Citations (Scopus)

    Abstract

    I review the literature covering the issue of interstellar extinction towards the Milky Way bulge, with emphasis placed on findings from planetary nebulae, RR Lyrae, and red clump stars. I also report on observations from HI gas and globular clusters. I show that there has been substantial progress in this field in recent decades, most particularly from red clump stars. The spatial coverage of extinction maps has increased by a factor ~100× in the past 20 yr, and the total-to-selective extinction ratios reported have shifted by ~20–25%, indicative of the improved accuracy and separately, of a steeper-than-standard extinction curve. Problems remain in modelling differential extinction, explaining anomalies involving the planetary nebulae, and understanding the difference between bulge extinction coefficients and ‘standard’ literature values.

    Original languageEnglish
    Article numbere024
    JournalPublications of the Astronomical Society of Australia
    Volume33
    DOIs
    Publication statusPublished - 28 Jun 2016

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