
PHANGS-JWST first results : the 21 μm compact source population
- Author
- Hamid Hassani, Erik Rosolowsky, Adam K. Leroy, Mederic Boquien, Janice C. Lee, Ashley. T. Barnes, Francesco Belfiore, Frank Bigiel, Yixian Cao, Melanie Chevance, Daniel A. Dale, Oleg V. Egorov, Eric Emsellem, Christopher M. Faesi, Kathryn Grasha, Jaeyeon Kim, Ralf S. Klessen, Kathryn Kreckel, J. M. Diederik Kruijssen, Kirsten L. Larson, Sharon Meidt van der Wel (UGent) , Karin M. Sandstrom, Eva Schinnerer, David A. Thilker, Elizabeth J. Watkins, Bradley C. Whitmore and Thomas G. Williams
- Organization
- Abstract
- We use PHANGS-James Webb Space Telescope (JWST) data to identify and classify 1271 compact 21 mu m sources in four nearby galaxies using MIRI F2100W data. We identify sources using a dendrogram-based algorithm, and we measure the background-subtracted flux densities for JWST bands from 2 to 21 mu m. Using the spectral energy distribution (SED) in JWST and HST bands plus ALMA and MUSE/VLT observations, we classify the sources by eye. Then we use this classification to define regions in color-color space and so establish a quantitative framework for classifying sources. We identify 1085 sources as belonging to the ISM of the target galaxies with the remainder being dusty stars or background galaxies. These 21 mu m sources are strongly spatially associated with H II regions (>92% of sources), while 74% of the sources are coincident with a stellar association defined in the HST data. Using SED fitting, we find that the stellar masses of the 21 mu m sources span a range of 10(2)-10(4) M circle dot with mass-weighted ages down to 2 Myr. There is a tight correlation between attenuation-corrected H alpha and 21 mu m luminosity for L-nu,L-F2100W > 10(19) W Hz(-1). Young embedded source candidates selected at 21 mu m are found below this threshold and have M-* < 10(3) M circle dot.
- Keywords
- Infrared astronomy, Spiral galaxies, Star formation, YOUNG STAR-CLUSTERS, INFRARED-EMISSION, INTERSTELLAR DUST, MOLECULAR CLOUDS, NEARBY GALAXIES, FORMATION RATES, EVOLUTION, HST, I., RESOLUTION
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Citation
Please use this url to cite or link to this publication: http://hdl.handle.net/1854/LU-01GKMJFMJE3F87Y45BEZTKWHDK
- MLA
- Hassani, Hamid, et al. “PHANGS-JWST First Results : The 21 Μm Compact Source Population.” ASTROPHYSICAL JOURNAL, vol. 944, no. 2, 2023, doi:10.3847/2041-8213/aca8ab.
- APA
- Hassani, H., Rosolowsky, E., K. Leroy, A., Boquien, M., C. Lee, J., T. Barnes, Ashley., … G. Williams, T. (2023). PHANGS-JWST first results : the 21 μm compact source population. ASTROPHYSICAL JOURNAL, 944(2). https://doi.org/10.3847/2041-8213/aca8ab
- Chicago author-date
- Hassani, Hamid, Erik Rosolowsky, Adam K. Leroy, Mederic Boquien, Janice C. Lee, Ashley. T. Barnes, Francesco Belfiore, et al. 2023. “PHANGS-JWST First Results : The 21 Μm Compact Source Population.” ASTROPHYSICAL JOURNAL 944 (2). https://doi.org/10.3847/2041-8213/aca8ab.
- Chicago author-date (all authors)
- Hassani, Hamid, Erik Rosolowsky, Adam K. Leroy, Mederic Boquien, Janice C. Lee, Ashley. T. Barnes, Francesco Belfiore, Frank Bigiel, Yixian Cao, Melanie Chevance, Daniel A. Dale, Oleg V. Egorov, Eric Emsellem, Christopher M. Faesi, Kathryn Grasha, Jaeyeon Kim, Ralf S. Klessen, Kathryn Kreckel, J. M. Diederik Kruijssen, Kirsten L. Larson, Sharon Meidt van der Wel, Karin M. Sandstrom, Eva Schinnerer, David A. Thilker, Elizabeth J. Watkins, Bradley C. Whitmore, and Thomas G. Williams. 2023. “PHANGS-JWST First Results : The 21 Μm Compact Source Population.” ASTROPHYSICAL JOURNAL 944 (2). doi:10.3847/2041-8213/aca8ab.
- Vancouver
- 1.Hassani H, Rosolowsky E, K. Leroy A, Boquien M, C. Lee J, T. Barnes Ashley, et al. PHANGS-JWST first results : the 21 μm compact source population. ASTROPHYSICAL JOURNAL. 2023;944(2).
- IEEE
- [1]H. Hassani et al., “PHANGS-JWST first results : the 21 μm compact source population,” ASTROPHYSICAL JOURNAL, vol. 944, no. 2, 2023.
@article{01GKMJFMJE3F87Y45BEZTKWHDK, abstract = {{We use PHANGS-James Webb Space Telescope (JWST) data to identify and classify 1271 compact 21 mu m sources in four nearby galaxies using MIRI F2100W data. We identify sources using a dendrogram-based algorithm, and we measure the background-subtracted flux densities for JWST bands from 2 to 21 mu m. Using the spectral energy distribution (SED) in JWST and HST bands plus ALMA and MUSE/VLT observations, we classify the sources by eye. Then we use this classification to define regions in color-color space and so establish a quantitative framework for classifying sources. We identify 1085 sources as belonging to the ISM of the target galaxies with the remainder being dusty stars or background galaxies. These 21 mu m sources are strongly spatially associated with H II regions (>92% of sources), while 74% of the sources are coincident with a stellar association defined in the HST data. Using SED fitting, we find that the stellar masses of the 21 mu m sources span a range of 10(2)-10(4) M circle dot with mass-weighted ages down to 2 Myr. There is a tight correlation between attenuation-corrected H alpha and 21 mu m luminosity for L-nu,L-F2100W > 10(19) W Hz(-1). Young embedded source candidates selected at 21 mu m are found below this threshold and have M-* < 10(3) M circle dot.}}, articleno = {{L21}}, author = {{Hassani, Hamid and Rosolowsky, Erik and K. Leroy, Adam and Boquien, Mederic and C. Lee, Janice and T. Barnes, Ashley. and Belfiore, Francesco and Bigiel, Frank and Cao, Yixian and Chevance, Melanie and A. Dale, Daniel and V. Egorov, Oleg and Emsellem, Eric and M. Faesi, Christopher and Grasha, Kathryn and Kim, Jaeyeon and S. Klessen, Ralf and Kreckel, Kathryn and M. Diederik Kruijssen, J. and L. Larson, Kirsten and van der Wel, Sharon Meidt and M. Sandstrom, Karin and Schinnerer, Eva and A. Thilker, David and J. Watkins, Elizabeth and C. Whitmore, Bradley and G. Williams, Thomas}}, issn = {{2041-8205}}, journal = {{ASTROPHYSICAL JOURNAL}}, keywords = {{Infrared astronomy,Spiral galaxies,Star formation,YOUNG STAR-CLUSTERS,INFRARED-EMISSION,INTERSTELLAR DUST,MOLECULAR CLOUDS,NEARBY GALAXIES,FORMATION RATES,EVOLUTION,HST,I.,RESOLUTION}}, language = {{eng}}, number = {{2}}, pages = {{11}}, title = {{PHANGS-JWST first results : the 21 μm compact source population}}, url = {{http://doi.org/10.3847/2041-8213/aca8ab}}, volume = {{944}}, year = {{2023}}, }
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