QUASI-PERIODIC FORMALDEHYDE MASER FLARES IN THE MASSIVE PROTOSTELLAR OBJECT IRAS 18566+0408

被引：69

作者：

Araya, E. D. ^{[1
,2
,3
]}

Hofner, P. ^{[2
,4
,5
]}

Goss, W. M. ^{[2
]}

Kurtz, S. ^{[6
]}

Richards, A. M. S. ^{[7
]}

Linz, H. ^{[8
]}

Olmi, L. ^{[9
]}

Sewilo, M. ^{[10
]}

机构：

[1] Western Illinois Univ, Dept Phys, Macomb, IL 61455 USA

[2] Natl Radio Astron Observ, Socorro, NM 87801 USA

[3] Univ New Mexico, Dept Phys & Astron, Albuquerque, NM 87131 USA

[4] Max Planck Inst Radioastron, D-53121 Bonn, Germany

[5] New Mexico Inst Min & Technol, Dept Phys, Socorro, NM 87801 USA

[6] Univ Nacl Autonoma Mexico, Ctr Radioastron & Astrofis, Morelia 58089, Michoacan, Mexico

[7] Univ Manchester, Jodrell Bank, Ctr Astrophys, Sch Phys & Astron, Manchester M13 9PL, Lancs, England

[8] Max Planck Inst Astron, D-69117 Heidelberg, Germany

[9] Univ Puerto Rico Rio Piedras, Dept Phys, San Juan, PR 00931 USA

[10] Space Telescope Sci Inst, Baltimore, MD 21218 USA

来源：

ASTROPHYSICAL JOURNAL LETTERS | 2010年 / 717卷 / 02期

基金：

美国国家科学基金会;

关键词：

ISM: individual objects (IRAS 18566+0408); ISM: molecules; masers; radio lines: general; II METHANOL MASERS; 6 CM EMISSION; CIRCUMBINARY DISK; STELLAR OBJECTS; H2CO; IRAS-18566+0408; SEARCH; ACCRETION; OUTFLOWS; BINARY;

D O I：

10.1088/2041-8205/717/2/L133

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We report results of an extensive observational campaign of the 6 cm formaldehyde maser in the young massive stellar object IRAS 18566+0408 (G37.55+0.20) conducted from 2002 to 2009. Using the Arecibo Telescope, the Very Large Array, and the Green Bank Telescope, we discovered quasi-periodic formaldehyde flares (P similar to 237 days). Based on Arecibo observations, we also discovered correlated variability between formaldehyde (H2CO) and methanol (CH3OH) masers. The H2CO and CH3OH masers are not spatially coincident, as demonstrated by different line velocities and high angular resolution MERLIN observations. The flares could be caused by variations in the infrared radiation field, possibly modulated by periodic accretion onto a young binary system.

引用

页码：L133 / L137

页数：5

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