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          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents

ID: 559056.0, MPI für Astronomie / Publikationen_mpia
Quasi-periodic formaldehyde maser flares in themassive protostellar object IRAS 18566+0408
Authors:Araya, E. D.; Hofner, P.; Goss, W. M.; Kurtz, S.; Richards, A. M. S.; Linz, H.; Olmi, L.; Sewiło, M.
Date of Publication (YYYY-MM-DD):2010
Title of Journal:The Astrophysical Journal Letters
Journal Abbrev.:The Astrophysical Journal Letters
Issue / Number:2
Start Page:L133
End Page:L137
Review Status:not specified
Audience:Experts Only
Abstract / Description: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 ~ 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.
Free Keywords:ISM: individual objects: IRAS 18566+0408; ISM: molecules; masers; radio lines: general
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für Astronomie
Identifiers:URL: [ID No:1]
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