2020
DOI: 10.3847/2041-8213/abbd3f
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Confirming the Explosive Outflow in G5.89 with ALMA

Abstract: The explosive molecular outflow detected decades ago in the Orion BN/KL region of massive star formation was considered to be a bizarre event. This belief was strengthened by the non detection of similar cases over the years with the only exception of the marginal case of DR21. Here, we confim a similar explosive outflow associated with the UCH II region G5.89−0.39 that indicates that this phenomenon is not unique to Orion or DR21. Sensitive and high angular resolution (∼ 0.1) ALMA CO(2−1) and SiO(5−4) observa… Show more

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Cited by 22 publications
(24 citation statements)
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“…The nearest region of on-going massive star formation, Orion OMC1, experienced a powerful explosion about 550 years ago (Bally & Zinnecker 2005;Zapata et al 2009;Bally et al 2015Bally et al , 2017Bally et al , 2020. Several other massive star forming regions contain explosive protostellar outflows (Zapata et al 2017(Zapata et al , 2020. Here we show that the exciting star of the Hii region Sh2-106 (S106 for short) likely experienced a powerful explosion several thousands of years ago.…”
Section: Introductionmentioning
confidence: 61%
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“…The nearest region of on-going massive star formation, Orion OMC1, experienced a powerful explosion about 550 years ago (Bally & Zinnecker 2005;Zapata et al 2009;Bally et al 2015Bally et al , 2017Bally et al , 2020. Several other massive star forming regions contain explosive protostellar outflows (Zapata et al 2017(Zapata et al , 2020. Here we show that the exciting star of the Hii region Sh2-106 (S106 for short) likely experienced a powerful explosion several thousands of years ago.…”
Section: Introductionmentioning
confidence: 61%
“…S106 IR joins the growing list of forming massive stars or young massive stars that have spawned explosive outflows. These include the highly obscured OMC1 in Orion (Zapata et al 2009;Bally et al 2020), the massive but distant G5.89 star forming region (Zapata et al 2019(Zapata et al , 2020, and DR21 (Zapata et al 2013). Explosive events from embedded protostars may have a particularly powerful feedback impact on their parent clouds.…”
Section: Other Regions Similar To S106mentioning
confidence: 99%
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“…Due to the limitation of sensitivity of this outflow survey, we should bear in mind that the outflow wing velocities are likely to be lower limits. For instance, there are clumps in our outflow sample associated with extremely high-velocity outflows, that is, ∆V max b > 20 km s −1 (Choi et al 1993), detected in previous work (e.g., Hervías-Caimapo et al 2019;Zapata et al 2020;Liu et al 2017), and many clumps with very broad SiO (2-1) line wings observed by Csengeri et al (2016). To investigate the distance bias for the outflow detection rate, as discussed in Sect.…”
Section: Resultsmentioning
confidence: 88%
“…This is an alternative scenario to the one of the "single peak radial velocity pulse" model of Raga et al (2020a,b), which also produces "Hubble law clumps". Clearly, these two possibilities are useful as guidelines to obtaining detailed models of structures with these characteristics in PN (see, e.g., Dennis et al 2008) or in outflows in star formation regions (see, e.g., Zapata et al 2020). We end by noting that the results presented in this paper directly depend on quite arbitrary assumptions of a pulse-like ejection and a non-top hat ejection velocity cross section.…”
Section: Discussionmentioning
confidence: 89%