Detection of an Explosive Outflow in G34.26+0.15 Article Swipe
Namitha Issac
,
Xing Lu
,
Tie Liu
,
Luis A. Zapata
,
Hongli Liu
,
Anandmayee Tej
,
Yan-Kun Zhang
,
Wenyu Jiao
,
Suinan Zhang
·
YOU?
·
· 2025
· Open Access
·
· DOI: https://doi.org/10.48550/arxiv.2504.15748
YOU?
·
· 2025
· Open Access
·
· DOI: https://doi.org/10.48550/arxiv.2504.15748
This paper reports on the detection of a likely explosive outflow in the high-mass star-forming complex G34.26+0.15, adding to the small number (six) of explosive outflows detected so far. ALMA CO(2-1) and SiO(5-4) archival observations reveal multiple outflow streamers from G34.26+0.15, which correlate well with H2 jets identified from Spitzer-IRAC 4.5 um and [4.5]/[3.6] flux ratio maps. These nearly linear outflow streamers originate from a common center within an ultracompact HII region located in the complex. The velocity spread of the outflow streamers ranges from 0 to 120 km/s. The radial velocities of these streamers follow the Hubble-Lemaître velocity law, indicating an explosive nature. From the CO emission, the total outflow mass, momentum, and outflow energy are estimated to be ~264 M_sun, 4.3*10^3 M_sun km/s, and 10^48 erg, respectively. The event triggering the outflow may have occurred about 19,000 years ago and could also be responsible for powering the expanding UC HII region, given the similar dynamical ages and positional coincidence of the UC HII region with the origin of the outflow. The magnetic field lines in the region associated with G34.26+0.15 also appear to align with the direction of the outflow streamers and jets, possibly being dragged by the explosive outflow.
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- preprint
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- http://arxiv.org/abs/2504.15748
- https://arxiv.org/pdf/2504.15748
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Detection of an Explosive Outflow in G34.26+0.15Work title
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preprintOpenAlex work type
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enPrimary language
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2025Year of publication
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2025-04-22Full publication date if available
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Namitha Issac, Xing Lu, Tie Liu, Luis A. Zapata, Hongli Liu, Anandmayee Tej, Yan-Kun Zhang, Wenyu Jiao, Suinan ZhangList of authors in order
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https://arxiv.org/abs/2504.15748Publisher landing page
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https://arxiv.org/pdf/2504.15748Direct link to full text PDF
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YesWhether a free full text is available
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greenOpen access status per OpenAlex
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https://arxiv.org/pdf/2504.15748Direct OA link when available
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0Total citation count in OpenAlex
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