PHANGS–JWST first results : variations in PAH fraction as a function of ISM phase and metallicity
- Author
- Jérémy Chastenet (UGent) , Jessica Sutter, Karin Sandstrom, Francesco Belfiore, Oleg V. Egorov, Kirsten L. Larson, Adam K. Leroy, Daizhong Liu, Erik Rosolowsky, David A. Thilker, Elizabeth J. Watkins, Thomas G. Williams, Ashley. T. Barnes, Frank Bigiel, Médéric Boquien, Mélanie Chevance, I-Da Chiang, Daniel A. Dale, J. M. Diederik Kruijssen, Eric Emsellem, Kathryn Grasha, Brent Groves, Hamid Hassani, Annie Hughes, Kathryn Kreckel, Sharon Meidt van der Wel (UGent) , Ryan J. Rickards Vaught, Amy Sardone and Eva Schinnerer
- Organization
- Project
- Abstract
- We present maps tracing the fraction of dust in the form of polycyclic aromatic hydrocarbons (PAHs) in IC 5332, NGC 628, NGC 1365, and NGC 7496 from JWST/MIRI observations. We trace the PAH fraction by combining the F770W (7.7 mu m) and F1130W (11.3 mu m) filters to track ionized and neutral PAH emission, respectively, and comparing the PAH emission to F2100W, which traces small, hot dust grains. We find the average R-PAH = (F770W + F1130W)/F2100W values of 3.3, 4.7, 5.1, and 3.6 in IC 5332, NGC 628, NGC 1365, and NGC 7496, respectively. We find that H II regions traced by MUSE H alpha show a systematically low PAH fraction. The PAH fraction remains relatively constant across other galactic environments, with slight variations. We use CO+HI +H alpha to trace the interstellar gas phase and find that the PAH fraction decreases above a value of I-Ha/Sigma(H1+H2) similar to 10(37.5) erg s(-1) kpc(-2()M(circle dot)pc(-2)-1) inall four galaxies. Radial profiles also show a decreasing PAH fraction with increasing radius, correlated with lower metallicity, in line with previous results showing a strong metallicity dependence to the PAH fraction. Our results suggest that the process of PAH destruction in ionized gas operates similarly across the four targets.
- Keywords
- Space and Planetary Science, Astronomy and Astrophysics, POLYCYCLIC AROMATIC-HYDROCARBON, INTERSTELLAR RADIATION-FIELD, SPECTRAL ENERGY-DISTRIBUTION, STAR-FORMATION RATE, PHOTODISSOCIATION REGIONS, INFRARED-EMISSION, MOLECULAR GAS, DUST MODELS, GALAXIES, SPITZER
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Please use this url to cite or link to this publication: http://hdl.handle.net/1854/LU-01H4645NX5AZ8P3F7320QG2NVR
- MLA
- Chastenet, Jérémy, et al. “PHANGS–JWST First Results : Variations in PAH Fraction as a Function of ISM Phase and Metallicity.” ASTROPHYSICAL JOURNAL LETTERS, vol. 944, no. 2, 2023, doi:10.3847/2041-8213/acadd7.
- APA
- Chastenet, J., Sutter, J., Sandstrom, K., Belfiore, F., Egorov, O. V., Larson, K. L., … Schinnerer, E. (2023). PHANGS–JWST first results : variations in PAH fraction as a function of ISM phase and metallicity. ASTROPHYSICAL JOURNAL LETTERS, 944(2). https://doi.org/10.3847/2041-8213/acadd7
- Chicago author-date
- Chastenet, Jérémy, Jessica Sutter, Karin Sandstrom, Francesco Belfiore, Oleg V. Egorov, Kirsten L. Larson, Adam K. Leroy, et al. 2023. “PHANGS–JWST First Results : Variations in PAH Fraction as a Function of ISM Phase and Metallicity.” ASTROPHYSICAL JOURNAL LETTERS 944 (2). https://doi.org/10.3847/2041-8213/acadd7.
- Chicago author-date (all authors)
- Chastenet, Jérémy, Jessica Sutter, Karin Sandstrom, Francesco Belfiore, Oleg V. Egorov, Kirsten L. Larson, Adam K. Leroy, Daizhong Liu, Erik Rosolowsky, David A. Thilker, Elizabeth J. Watkins, Thomas G. Williams, Ashley. T. Barnes, Frank Bigiel, Médéric Boquien, Mélanie Chevance, I-Da Chiang, Daniel A. Dale, J. M. Diederik Kruijssen, Eric Emsellem, Kathryn Grasha, Brent Groves, Hamid Hassani, Annie Hughes, Kathryn Kreckel, Sharon Meidt van der Wel, Ryan J. Rickards Vaught, Amy Sardone, and Eva Schinnerer. 2023. “PHANGS–JWST First Results : Variations in PAH Fraction as a Function of ISM Phase and Metallicity.” ASTROPHYSICAL JOURNAL LETTERS 944 (2). doi:10.3847/2041-8213/acadd7.
- Vancouver
- 1.Chastenet J, Sutter J, Sandstrom K, Belfiore F, Egorov OV, Larson KL, et al. PHANGS–JWST first results : variations in PAH fraction as a function of ISM phase and metallicity. ASTROPHYSICAL JOURNAL LETTERS. 2023;944(2).
- IEEE
- [1]J. Chastenet et al., “PHANGS–JWST first results : variations in PAH fraction as a function of ISM phase and metallicity,” ASTROPHYSICAL JOURNAL LETTERS, vol. 944, no. 2, 2023.
@article{01H4645NX5AZ8P3F7320QG2NVR,
abstract = {{We present maps tracing the fraction of dust in the form of polycyclic aromatic hydrocarbons (PAHs) in IC 5332, NGC 628, NGC 1365, and NGC 7496 from JWST/MIRI observations. We trace the PAH fraction by combining the F770W (7.7 mu m) and F1130W (11.3 mu m) filters to track ionized and neutral PAH emission, respectively, and comparing the PAH emission to F2100W, which traces small, hot dust grains. We find the average R-PAH = (F770W + F1130W)/F2100W values of 3.3, 4.7, 5.1, and 3.6 in IC 5332, NGC 628, NGC 1365, and NGC 7496, respectively. We find that H II regions traced by MUSE H alpha show a systematically low PAH fraction. The PAH fraction remains relatively constant across other galactic environments, with slight variations. We use CO+HI +H alpha to trace the interstellar gas phase and find that the PAH fraction decreases above a value of I-Ha/Sigma(H1+H2) similar to 10(37.5) erg s(-1) kpc(-2()M(circle dot)pc(-2)-1) inall four galaxies. Radial profiles also show a decreasing PAH fraction with increasing radius, correlated with lower metallicity, in line with previous results showing a strong metallicity dependence to the PAH fraction. Our results suggest that the process of PAH destruction in ionized gas operates similarly across the four targets.}},
articleno = {{L11}},
author = {{Chastenet, Jérémy and Sutter, Jessica and Sandstrom, Karin and Belfiore, Francesco and Egorov, Oleg V. and Larson, Kirsten L. and Leroy, Adam K. and Liu, Daizhong and Rosolowsky, Erik and Thilker, David A. and Watkins, Elizabeth J. and Williams, Thomas G. and Barnes, Ashley. T. and Bigiel, Frank and Boquien, Médéric and Chevance, Mélanie and Chiang, I-Da and Dale, Daniel A. and Kruijssen, J. M. Diederik and Emsellem, Eric and Grasha, Kathryn and Groves, Brent and Hassani, Hamid and Hughes, Annie and Kreckel, Kathryn and van der Wel, Sharon Meidt and Rickards Vaught, Ryan J. and Sardone, Amy and Schinnerer, Eva}},
issn = {{2041-8205}},
journal = {{ASTROPHYSICAL JOURNAL LETTERS}},
keywords = {{Space and Planetary Science,Astronomy and Astrophysics,POLYCYCLIC AROMATIC-HYDROCARBON,INTERSTELLAR RADIATION-FIELD,SPECTRAL ENERGY-DISTRIBUTION,STAR-FORMATION RATE,PHOTODISSOCIATION REGIONS,INFRARED-EMISSION,MOLECULAR GAS,DUST MODELS,GALAXIES,SPITZER}},
language = {{eng}},
number = {{2}},
pages = {{10}},
title = {{PHANGS–JWST first results : variations in PAH fraction as a function of ISM phase and metallicity}},
url = {{http://doi.org/10.3847/2041-8213/acadd7}},
volume = {{944}},
year = {{2023}},
}
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