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| Main Authors: | , , |
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| Format: | Preprint |
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2025
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2511.13585 |
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| _version_ | 1866909908851490816 |
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| author | Beck, Sara Hsieh, Pei-Ying Turner, Jean |
| author_facet | Beck, Sara Hsieh, Pei-Ying Turner, Jean |
| contents | Haro 2 is a blue compact dwarf galaxy and the closest (at 21Mpc) known $Lyα$ emitter. UV and optical observations have found Haro 2 to be immersed in shells of partly ionized gas expanding at $\sim200$km/s. Observations of CO(2-1) (Becket et al 2020; Paper 1) with moderate ($2^{\prime\prime}$) resolution discovered a large-scale one-sided outflow associated with a soft X-ray bubble and apparently driven by the young star clusters created in the recent starburst. We present here SMA observations of CO(3-2) with $1.1^{\prime\prime}$ resolution in Haro 2. The opposite-side component of the large molecular outflow is detected lying in the direction of the fast ionized outflow; it is very confined in area. An additional outflow is apparent in the CO(3-2); it is south-east of the galaxy in a region holding weak star formation and a moderate-luminosity hard X-ray source. All the molecular outflow and filament velocities are within $\lesssim\pm50$km/s of the systemic velocity of the galaxy. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2511_13585 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | High Resolution Observations of CO(3-2) in Haro 2: Cool Molecular Outflows of a Ly$α$ Emitter Beck, Sara Hsieh, Pei-Ying Turner, Jean Astrophysics of Galaxies Haro 2 is a blue compact dwarf galaxy and the closest (at 21Mpc) known $Lyα$ emitter. UV and optical observations have found Haro 2 to be immersed in shells of partly ionized gas expanding at $\sim200$km/s. Observations of CO(2-1) (Becket et al 2020; Paper 1) with moderate ($2^{\prime\prime}$) resolution discovered a large-scale one-sided outflow associated with a soft X-ray bubble and apparently driven by the young star clusters created in the recent starburst. We present here SMA observations of CO(3-2) with $1.1^{\prime\prime}$ resolution in Haro 2. The opposite-side component of the large molecular outflow is detected lying in the direction of the fast ionized outflow; it is very confined in area. An additional outflow is apparent in the CO(3-2); it is south-east of the galaxy in a region holding weak star formation and a moderate-luminosity hard X-ray source. All the molecular outflow and filament velocities are within $\lesssim\pm50$km/s of the systemic velocity of the galaxy. |
| title | High Resolution Observations of CO(3-2) in Haro 2: Cool Molecular Outflows of a Ly$α$ Emitter |
| topic | Astrophysics of Galaxies |
| url | https://arxiv.org/abs/2511.13585 |