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Verfasst von:Calzetti, Daniela [VerfasserIn]   i
 Battisti, Andrew J. [VerfasserIn]   i
 Shivaei, Irene [VerfasserIn]   i
 Messa, Matteo [VerfasserIn]   i
 Cignoni, Michele [VerfasserIn]   i
 Adamo, Angela [VerfasserIn]   i
 Dale, Daniel A. [VerfasserIn]   i
 Gallagher, John S. [VerfasserIn]   i
 Grasha, Kathryn [VerfasserIn]   i
 Grebel, Eva K. [VerfasserIn]   i
 Kennicutt, Robert C. [VerfasserIn]   i
 Linden, Sean [VerfasserIn]   i
 Östlin, Göran [VerfasserIn]   i
 Sabbi, Elena [VerfasserIn]   i
 Smith, Linda J. [VerfasserIn]   i
 Tosi, Monica [VerfasserIn]   i
 Wofford, Aida [VerfasserIn]   i
Titel:Revisiting attenuation curves
Titelzusatz:the case of NGC 3351
Verf.angabe:Daniela Calzetti, Andrew J. Battisti, Irene Shivaei, Matteo Messa, Michele Cignoni, Angela Adamo, Daniel A. Dale, John S. Gallagher, Kathryn Grasha, Eva K. Grebel, Robert C. Kennicutt, Sean T. Linden, Göran Östlin, Elena Sabbi, Linda J. Smith, Monica Tosi, and Aida Wofford
E-Jahr:2021
Jahr:2021 May 21
Umfang:31 S.
Fussnoten:Based on observations obtained with the NASA/ESA Hubble Space Telescope, at the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS 5-26555 ; Gesehen am 21.02.2022
Titel Quelle:Enthalten in: The astrophysical journal / 1
Ort Quelle:London : Institute of Physics Publ., 1995
Jahr Quelle:2021
Band/Heft Quelle:913(2021), 1 vom: Apr., Artikel-ID 37, Seite 1-31
ISSN Quelle:1538-4357
Abstract:Multiwavelength images from the far-UV (∼0.15 μm) to the submillimeter of the central region of the galaxy NGC 3351 are analyzed to constrain its stellar populations and dust attenuation. Despite hosting a ∼1 kpc circumnuclear starburst ring, NGC 3351 deviates from the IRX-β relation, the relation between the infrared-to-UV luminosity ratio and the UV continuum slope β that other starburst galaxies follow. To understand the reason for the deviation, we leverage the high angular resolution of archival near-UV-to-near-IR Hubble Space Telescope images to divide the ring into ∼60-180 pc size regions and model each individually. We find that the UV slope of the combined intrinsic (dust-free) stellar populations in the central region is redder than what is expected for a young model population. This is due to the region’s complex star formation history, which boosts the near-UV emission relative to the far-UV. The resulting net attenuation curve has a UV slope that lies between those of the starburst attenuation curve (Calzetti et al. 2000) and the Small Magellanic Cloud extinction curve; the total-to-selective attenuation value, (V) = 4.93, is larger than both. As found for other star-forming galaxies, the stellar continuum of NGC 3351 is less attenuated than the ionized gas, with E(B − V)star = 0.40 E(B − V)gas. The combination of the “red” intrinsic stellar population and the new attenuation curve fully accounts for the location of the central region of NGC 3351 on the IRX-β diagram. Thus, the observed characteristics result from the complex mixture of stellar populations and dust column densities in the circumnuclear region. Despite being a sample of one, these findings highlight the difficulty of defining attenuation curves of general applicability outside the regime of centrally concentrated starbursts.
DOI:doi:10.3847/1538-4357/abf118
URL:Bitte beachten Sie: Dies ist ein Bibliographieeintrag. Ein Volltextzugriff für Mitglieder der Universität besteht hier nur, falls für die entsprechende Zeitschrift/den entsprechenden Sammelband ein Abonnement besteht oder es sich um einen OpenAccess-Titel handelt.

Volltext: https://doi.org/10.3847/1538-4357/abf118
 DOI: https://doi.org/10.3847/1538-4357/abf118
Datenträger:Online-Ressource
Sprache:eng
K10plus-PPN:1793373434
Verknüpfungen:→ Zeitschrift

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