A Submillimeter Burst of S255IR SMA1: The Rise and Fall of Its Luminosity

被引：31

作者：

Liu, Sheng-Yuan ^{[1
]}

Su, Yu-Nung ^{[1
]}

Zinchenko, Igor ^{[2
]}

Wang, Kuo-Song ^{[1
]}

Wang, Yuan ^{[3
]}

机构：

[1] Acad Sinica, Inst Astron & Astrophys, 11F ASMAB,AS NTU 1,Sec 4,Roosevelt Rd, Taipei 10617, Taiwan

[2] Russian Acad Sci, Inst Appl Phys, 46 Ulyanov Str, Nizhnii Novgorod 603950, Russia

[3] Max Planck Inst Astron, Konigstuhl 17, D-69117 Heidelberg, Germany

来源：

ASTROPHYSICAL JOURNAL LETTERS | 2018年 / 863卷 / 01期

基金：

俄罗斯科学基金会;

关键词：

ISM: individual objects (S255IR/S255IR SMA1); stars: formation; stars: protostars; submillimeter: ISM; ACCRETION;

D O I：

10.3847/2041-8213/aad63a

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Temporal photometric variations at near-infrared to submillimeter wavelengths have been found in low-mass young stellar objects. These phenomena are generally interpreted as accretion events of star-disk systems with varying accretion rates. There is growing evidence suggesting that similar luminosity flaring also occurs in highmass star/cluster-forming regions. We report in this Letter the rise and fall of the 900 mu m continuum emission and the newly found 349.1 GHz methanol maser emission in the massive star-forming region S255IR. SMA1 observed with the Submillimeter Array and the Atacama Large Millimeter/submillimeter Array. The level of flux variation at a factor of similar to 2 at the submillimeter band and the relatively short 2 years duration of this burst suggest that the event is probably similar to those milder and more frequent minor bursts seen in 3D numerical simulations.

引用

页数：6