Characterizing the Circumgalactic Medium of Quasars at z $\sim$ 2.2 through H$\alpha$ and Ly$\alpha$ Emission
| Autor: | Langen, Vivienne, Cantalupo, Sebastiano, Steidel, Charles C., Chen, Yuguang, Pezzulli, Gabriele, Gallego, Sofia G. |
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| Rok vydání: | 2023 |
| Předmět: | |
| Zdroj: | Monthly Notices of the Royal Astronomical Society, Volume 519, Issue 4, March 2023, Pages 5099 to 5113 |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1093/mnras/stac3205 |
| Popis: | The discovery of giant quasar Ly$\alpha$ nebulae at $z>2$ has opened up the possibility to directly study in emission the Circumgalactic and Intergalactic Medium (CGM/IGM). However, the resonant nature of the Ly$\alpha$ line and its different emission mechanisms hamper the ability to constrain both the kinematics and physical properties of the CGM/IGM. Here, we present results of a pilot project aiming at the detection of CGM H$\alpha$ emission, a line which does not suffer from these limitations. To this end, we first used KCWI to detect Ly$\alpha$ emission around three bright quasars with $2.25 Comment: 15 pages, 12 figures, 2 tables |
| Databáze: | arXiv |
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