التفاصيل البيبلوغرافية
| العنوان: |
The IRX–β relation in kpc-sized star-forming regions in nearby galaxies. |
| المؤلفون: |
Duffy, Laura, Molina, Mallory, Eracleous, Michael, Ciardullo, Robin, Yan, Renbin, Gronwall, Caryl, Ajgaonkar, Nikhil, Boquien, Médéric, Zhou, Shuang, Li, Cheng |
| المصدر: |
Monthly Notices of the Royal Astronomical Society; 11/21/2023, Vol. 526 Issue 1, p904-917, 14p |
| مصطلحات موضوعية: |
GALAXIES, OPTICAL telescopes, ASTRONOMICAL surveys |
| الشركة/الكيان: |
SLOAN Digital Sky Survey |
| مستخلص: |
The effect of dust attenuation on a galaxy's light depends on a number of physical properties, such as geometry and dust composition, both of which can vary across the faces of galaxies. To investigate this variation, we continue analysis on star-forming regions in 29 galaxies studied previously. We analyse these regions using Swift /UV Optical Telescope and Wide-field Infrared Survey Explorer images, as well as Sloan Digital Sky Survey/Mapping Nearby Galaxies at Apache Point Observatory emission line maps to constrain the relationship between the infrared excess (IRX) and the ultraviolet spectral index, β, for each star-forming region. This relationship can be used to constrain which dust attenuation law is appropriate for the region. We find that the value of Dn (4000) for a region is correlated with both IRX and β, and that the gas-phase metallicity is strongly correlated with the IRX. This correlation between metallicity and IRX suggests that regardless of aperture, metal-rich regions have steeper attenuation curves. We also find that integrated galactic light follows nearly the same IRX–β relationship as that found for kpc-sized star-forming regions. This similarity may suggest that the attenuation law followed by the galaxy is essentially the same as that followed by the regions, although the relatively large size of our star-forming regions complicates this interpretation because optical opacity and attenuation curves have been observed to vary within individual galaxies. [ABSTRACT FROM AUTHOR] |
|
Copyright of Monthly Notices of the Royal Astronomical Society is the property of Oxford University Press / USA and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) |
| قاعدة البيانات: |
Complementary Index |
Full Text Finder