INTEGRAL FIELD UNIT SPECTROSCOPY OF THE STELLAR DISK TRUNCATION REGION OF NGC 6155
- Department of Astronomy and McDonald Observatory, University of Texas, Austin, TX 78712 (United States)
- Department of Astronomy, University of Washington, Box 351580, Seattle, WA 98195 (United States)
Like the majority of spiral galaxies, NGC 6155 exhibits an exponential surface brightness profile that steepens significantly at large radii. Using the VIRUS-P integral field unit spectrograph, we have gathered spatially resolved spectra of the system. Modifying the GANDALF spectral fitting routine for use on the complex stellar populations found in spirals, we find that the average stellar ages increase significantly beyond the profile break radius. This result is in good agreement with recent simulations that predict the outskirts of disk galaxies are populated through stellar migration. With the ability to bin multiple fibers, we are able to measure stellar population ages down to {mu}{sub V} {approx} 24 mag arcsec{sup -2}.
- OSTI ID:
- 21450853
- Journal Information:
- Astrophysical Journal Letters, Vol. 716, Issue 1; Other Information: DOI: 10.1088/2041-8205/716/1/L4; ISSN 2041-8205
- Country of Publication:
- United States
- Language:
- English
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