Investigating silicate, carbon, and water in the diffuse interstellar medium: the first shots from WISCI
Fuente:
arXiv
Saved in:
| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
|---|---|
| Format: | Preprint |
| Published: |
2025
|
| Subjects: | |
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866918069689909248 |
|---|---|
| author | Zeegers, S. T. Marshall, Jonathan P. Gordon, Karl D. Misselt, Karl A. Otten, G. P. P. L. Bouwman, Jeroen Chiar, Jean Decleir, Marjorie Dharmawardena, Thavisha Kemper, F. Li, Aigen Narang, Mayank Potapov, Alexey Puravankara, Manoj Scicluna, Peter Tyagi, Himanshu Zari, Eleonora Wei, ChuanYu Kaper, Lex Backs, Frank Bromley, Stefan T. Chu, Laurie Costantini, Elisa Geballe, T. R. Green, Joel D. Gunasekera, Chamani Günay, Burcu Henning, Thomas Jones, Olivia Guiu, Joan Mariñoso McClure, Melissa Pendleton, Yvonne J. Roman-Duval, Julia C. Shenar, Tomer Tielens, Alexander G. G. M. Waters, L. B. F. M. |
| author_facet | Zeegers, S. T. Marshall, Jonathan P. Gordon, Karl D. Misselt, Karl A. Otten, G. P. P. L. Bouwman, Jeroen Chiar, Jean Decleir, Marjorie Dharmawardena, Thavisha Kemper, F. Li, Aigen Narang, Mayank Potapov, Alexey Puravankara, Manoj Scicluna, Peter Tyagi, Himanshu Zari, Eleonora Wei, ChuanYu Kaper, Lex Backs, Frank Bromley, Stefan T. Chu, Laurie Costantini, Elisa Geballe, T. R. Green, Joel D. Gunasekera, Chamani Günay, Burcu Henning, Thomas Jones, Olivia Guiu, Joan Mariñoso McClure, Melissa Pendleton, Yvonne J. Roman-Duval, Julia C. Shenar, Tomer Tielens, Alexander G. G. M. Waters, L. B. F. M. |
| contents | The dusty interstellar medium (ISM) of the Milky Way is distributed in a complex, cloudy structure. It is fundamental to the radiation balance within the Milky Way, provides a reaction surface to form complex molecules, and is the feedstock for future generations of stars and planets. The life cycle of interstellar dust is not completely understood, and neither are its structure nor composition. The abundance, composition, and structure of dust in the diffuse ISM can be determined by combining infrared, optical and ultraviolet spectroscopy. JWST enables measurement of the faint absorption of ISM dust grains against bright stars at kiloparsec distances across the infrared spectrum. Here we present an overview of the project `Webb Investigation of Silicates, Carbons, and Ices' (WISCI) along with interpretation of two targets, GSC 08152-02121 and CPD-59 5831. Observations of 12 WISCI target stars were taken by JWST, the Hubble Space Telescope, Himalayan Chandra Telescope, and the Very Large Telescope. We use these to characterize the targets' spectral types and calculate their line-of-sight extinction parameters, $A_{\rm V}$ and $R_{\rm V}$. We find absorption in the JWST spectra of GSC 08152-02121, and CPD-59 5831 associated with carbonaceous dust around 3.4 and 6.2 micron and amorphous silicates at 9.7 micron. In GSC 08152-02121 we also find indications of absorption by trapped water around 3 micron. This first look from WISCI demonstrates the line-of-sight variability within the sample, and the program's potential to identify and correlate features across ultraviolet to mid-infrared wavelengths. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2506_20033 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Investigating silicate, carbon, and water in the diffuse interstellar medium: the first shots from WISCI Zeegers, S. T. Marshall, Jonathan P. Gordon, Karl D. Misselt, Karl A. Otten, G. P. P. L. Bouwman, Jeroen Chiar, Jean Decleir, Marjorie Dharmawardena, Thavisha Kemper, F. Li, Aigen Narang, Mayank Potapov, Alexey Puravankara, Manoj Scicluna, Peter Tyagi, Himanshu Zari, Eleonora Wei, ChuanYu Kaper, Lex Backs, Frank Bromley, Stefan T. Chu, Laurie Costantini, Elisa Geballe, T. R. Green, Joel D. Gunasekera, Chamani Günay, Burcu Henning, Thomas Jones, Olivia Guiu, Joan Mariñoso McClure, Melissa Pendleton, Yvonne J. Roman-Duval, Julia C. Shenar, Tomer Tielens, Alexander G. G. M. Waters, L. B. F. M. Astrophysics of Galaxies Solar and Stellar Astrophysics The dusty interstellar medium (ISM) of the Milky Way is distributed in a complex, cloudy structure. It is fundamental to the radiation balance within the Milky Way, provides a reaction surface to form complex molecules, and is the feedstock for future generations of stars and planets. The life cycle of interstellar dust is not completely understood, and neither are its structure nor composition. The abundance, composition, and structure of dust in the diffuse ISM can be determined by combining infrared, optical and ultraviolet spectroscopy. JWST enables measurement of the faint absorption of ISM dust grains against bright stars at kiloparsec distances across the infrared spectrum. Here we present an overview of the project `Webb Investigation of Silicates, Carbons, and Ices' (WISCI) along with interpretation of two targets, GSC 08152-02121 and CPD-59 5831. Observations of 12 WISCI target stars were taken by JWST, the Hubble Space Telescope, Himalayan Chandra Telescope, and the Very Large Telescope. We use these to characterize the targets' spectral types and calculate their line-of-sight extinction parameters, $A_{\rm V}$ and $R_{\rm V}$. We find absorption in the JWST spectra of GSC 08152-02121, and CPD-59 5831 associated with carbonaceous dust around 3.4 and 6.2 micron and amorphous silicates at 9.7 micron. In GSC 08152-02121 we also find indications of absorption by trapped water around 3 micron. This first look from WISCI demonstrates the line-of-sight variability within the sample, and the program's potential to identify and correlate features across ultraviolet to mid-infrared wavelengths. |
| title | Investigating silicate, carbon, and water in the diffuse interstellar medium: the first shots from WISCI |
| topic | Astrophysics of Galaxies Solar and Stellar Astrophysics |
| url | https://arxiv.org/abs/2506.20033 |