闪灯:项目概述

IF 2.2 4区物理与天体物理 Q2 ASTRONOMY & ASTROPHYSICS

Publications of the Astronomical Society of Japan Pub Date : 2023-10-03 DOI:10.1093/pasj/psad064

Hiroshi Imai, Yuhki Hamae, Kei Amada, Keisuke Nakashima, Ka-Yiu Shum, Rina Kasai, José F Gómez, Lucero Uscanga, Daniel Tafoya, Gabor Orosz, Ross A Burns

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引用次数: 0

摘要

摘要:本文概述了利用Nobeyama射电天文台45米望远镜推进的闪光灯(Nobeyama Generation of SiO-/H2O脉泽点火的最佳遗留收购)项目，该项目旨在集中监测H2O (22 GHz)和SiO (43 GHz)脉泽，这些脉泽与所谓的“喷泉”源有关。在这里，我们展示了基于flash前五个季节(2018年12月至2023年4月)数据的科学结果。我们展示了H2O脉泽光谱的演变，发现了新的光谱成分，这些成分打破了射流的最高速度和/或光谱中系统速度漂移的记录，表明了脉泽气体团块的加速或减速。对于43 GHz SiO脉泽发射，我们在一个源中新检测到它，发现它在另一个源中不再存在。这意味着这些喷泉的射流可以加速或减速，并显示了星周包层是如何被破坏的。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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FLASHING: Project overview

Abstract This paper describes an overview of the FLASHING (Finest Legacy Acquisitions of SiO-/H2O-maser Ignitions by the Nobeyama Generation) project promoted using the 45 m telescope of Nobeyama Radio Observatory, which aims to intensively monitor H2O (at 22 GHz) and SiO (at 43 GHz) masers associated with so-called “water fountain” sources. Here we show scientific results based on the data taken in the first five seasons of FLASHING, from 2018 December to 2023 April. We show the evolution of the H2O maser spectra, discovering new spectral components that break the record of the jet’s top speed and/or systematic velocity drifts in the spectrum indicating acceleration or deceleration of the maser gas clumps. For the 43 GHz SiO maser emission, we newly detect it in one source and find that it is no longer present in another source. This implies that the jets from these water fountains can be accelerated or decelerated, and show how circumstellar envelopes are destroyed.

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来源期刊

Publications of the Astronomical Society of Japan 地学天文-天文与天体物理

CiteScore

4.10

自引率

13.00%

发文量

审稿时长

4-8 weeks

期刊介绍： Publications of the Astronomical Society of Japan (PASJ) publishes the results of original research in all aspects of astronomy, astrophysics, and fields closely related to them.