FLASHING: Project overview

• DOI: 10.1093/pasj/psad064
• Publication Date: 2023-10-03T11:20:00Z
• Authors: 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
• Keywords: Astrophysics - Solar and Stellar Astrophysics; Astrophysics of Galaxies (astro-ph.GA); 0103 physical sciences; FOS: Physical sciences; Astrophysics - Astrophysics of Galaxies; 01 natural sciences; Solar and Stellar Astrophysics (astro-ph.SR)

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