One, Two, Three ... An Explosive Outflow in IRAS 12326-6245 Revealed by ALMA

IF 8.8 1区物理与天体物理 Q1 ASTRONOMY & ASTROPHYSICS

Astrophysical Journal Letters Pub Date : 2023-10-01 DOI:10.3847/2041-8213/acfe71

Luis A. Zapata, Manuel Fernández-López, Silvia Leurini, Estrella Guzmán Ccolque, Skretas, I. M., Luis F. Rodríguez, Aina, Palau, Karl M. Menten, Friedrich, Wyrowski

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引用次数: 0

Abstract

Abstract In the last years there has been a substantial increase in the number of the reported massive and luminous star-forming regions with related explosive outflows thanks to the superb sensitivity and angular resolution provided by the new radio, infrared, and optical facilities. Here, we report one more explosive outflow related with the massive and bright star-forming region IRAS 12326−6245 using Band 6 sensitive and high-angular-resolution (∼0.″2) Atacama Large Millimeter/Submillimeter Array observations. We find over 10 molecular and collimated well-defined streamers, with Hubble–Lemaitre–like expansion motions, and pointing right to the center of a dusty and molecular shell (reported for the first time here) localized in the northern part of the UC H ii region known as G301.1A. The estimated kinematic age and energy for the explosion are ∼700 yr and 10 48 erg, respectively. Taking into account the recently reported explosive outflows together with IRAS 12326−6245, we estimate an event rate of once every 90 yr in our Galaxy, similar to the formation rate of massive stars.

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一、二、三……ALMA揭示的IRAS 12326-6245的爆发性流出

在过去的几年中，由于新的无线电、红外和光学设备提供了卓越的灵敏度和角分辨率，报道的具有相关爆炸流出的大质量和发光恒星形成区域的数量大幅增加。在这里，我们使用波段6敏感和高角分辨率(~ 0.″2)阿塔卡马大毫米/亚毫米阵列观测报告了与大质量和明亮的恒星形成区IRAS 12326−6245相关的另一个爆炸流出。我们发现了超过10个分子和准直的定义明确的飘带，与哈勃勒梅特类似的膨胀运动，并指向位于uch区域北部的尘埃和分子壳的中心(在这里首次报道)，称为G301.1A。估计爆炸的运动年龄和能量分别为~ 700年和1048尔格。考虑到最近报道的爆炸性流出以及IRAS 12326 - 6245，我们估计银河系每90年发生一次事件，类似于大质量恒星的形成速度。

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来源期刊

Astrophysical Journal Letters ASTRONOMY & ASTROPHYSICS-

CiteScore

14.10

自引率

6.30%

发文量

513

审稿时长

2-3 weeks

期刊介绍： The Astrophysical Journal Letters (ApJL) is widely regarded as the foremost journal for swiftly disseminating groundbreaking astronomical research. It focuses on concise reports that highlight pivotal advancements in the field of astrophysics. By prioritizing timeliness and the generation of immediate interest among researchers, ApJL showcases articles featuring novel discoveries and critical findings that have a profound effect on the scientific community. Moreover, ApJL ensures that published articles are comprehensive in their scope, presenting context that can be readily comprehensible to scientists who may not possess expertise in the specific disciplines covered.