A MUSE Source-Blind Survey for Emission from the Circumgalactic Medium
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arXiv
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| Autori principali: | , |
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| Natura: | Preprint |
| Pubblicazione: |
2024
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| _version_ | 1866912062620303360 |
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| author | Zhang, Huanian Zaritsky, Dennis |
| author_facet | Zhang, Huanian Zaritsky, Dennis |
| contents | The recent detection of optical emission lines from the circumgalactic medium (CGM) in combined, large samples of low-redshift, normal galaxy spectra hints at the potential to map the cool ($\sim$ 10$^4$ K) CGM in individual, representative galaxies. Using archival data from a forefront instrument (MUSE) on the VLT, we present a source-blind, wide-redshift-range ($z \sim 0-5)$ narrow-band imaging survey for CGM emission. Our detected, resolved emission line sources are cataloged and include a 30 kpc wide H$α$ source likely tracing the CGM of a low-mass galaxy (stellar mass $\sim$ $10^{8.78\pm0.42}$ M$_\odot$) at $z=0.1723$, a 60 kpc wide Ly $α$ structure associated with a galaxy at $z=3.9076$, and a 130 kpc ($\sim r_{\rm vir}$) wide [O II] feature revealing an interaction between a galaxy pair at $z=1.2480$. The H$α$ velocity field for the low-mass galaxy suggests that the CGM is more chaotic or turbulent than the galaxy disk, while that for the interacting galaxies shows large-scale ($\sim 50$ kpc) coherent motions. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2410_05392 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | A MUSE Source-Blind Survey for Emission from the Circumgalactic Medium Zhang, Huanian Zaritsky, Dennis Astrophysics of Galaxies The recent detection of optical emission lines from the circumgalactic medium (CGM) in combined, large samples of low-redshift, normal galaxy spectra hints at the potential to map the cool ($\sim$ 10$^4$ K) CGM in individual, representative galaxies. Using archival data from a forefront instrument (MUSE) on the VLT, we present a source-blind, wide-redshift-range ($z \sim 0-5)$ narrow-band imaging survey for CGM emission. Our detected, resolved emission line sources are cataloged and include a 30 kpc wide H$α$ source likely tracing the CGM of a low-mass galaxy (stellar mass $\sim$ $10^{8.78\pm0.42}$ M$_\odot$) at $z=0.1723$, a 60 kpc wide Ly $α$ structure associated with a galaxy at $z=3.9076$, and a 130 kpc ($\sim r_{\rm vir}$) wide [O II] feature revealing an interaction between a galaxy pair at $z=1.2480$. The H$α$ velocity field for the low-mass galaxy suggests that the CGM is more chaotic or turbulent than the galaxy disk, while that for the interacting galaxies shows large-scale ($\sim 50$ kpc) coherent motions. |
| title | A MUSE Source-Blind Survey for Emission from the Circumgalactic Medium |
| topic | Astrophysics of Galaxies |
| url | https://arxiv.org/abs/2410.05392 |