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http://hdl.handle.net/20.500.12386/28521
Titolo: | Infrared variability, maser activity, and accretion of massive young stellar objects | Autori: | Stecklum, Bringfried CARATTI O GARATTI, ALESSIO Hodapp, Klaus Linz, Hendrik MOSCADELLI, Luca SANNA, ALBERTO |
Data pubblicazione: | 2018 | Titolo del volume in cui è pubblicato il poster: | Astrophysical Masers: Unlocking the Mysteries of the Universe | Curatore/i del volume in cui è pubblicato il contributo: | Tarchi, Andrea; Reid, Mark ; Castangia, Paola | Serie: | PROCEEDINGS OF THE INTERNATIONAL ASTRONOMICAL UNION | Numero: | vol. 13, S336 | Da pagina:: | 37 | Abstract: | Methanol and water masers indicate young stellar objects. They often exhibit flares, and a fraction shows periodic activity. Several mechanisms might explain this behavior but the lack of concurrent infrared (IR) data complicates the identification of its cause. Recently, 6.7 GHz methanol maser flares were observed, triggered by accretion bursts of high-mass YSOs which confirmed the IR-pumping of these masers. This suggests that regular IR changes might lead to maser periodicity. Hence, we scrutinized space-based IR imaging of YSOs associated with periodic methanol masers. We succeeded to extract the IR light curve from NEOWISE data for the intermediate mass YSO G107.298+5.639. Thus, for the first time a relationship between the maser and IR variability could be established. While the IR light curve shows the same period of ~34.6 days as the masers, its shape is distinct from that of the maser flares. Possible reasons for the IR periodicity are discussed. | Titolo del convegno: | Astrophysical Masers: Unlocking the Mysteries of the Universe | Luogo del convegno: | Cagliari, Italy | Periodo del convegno: | 4-8 September, 2017 | URI: | http://hdl.handle.net/20.500.12386/28521 | URL: | https://www.cambridge.org/core/journals/proceedings-of-the-international-astronomical-union/article/infrared-variability-maser-activity-and-accretion-of-massive-young-stellar-objects/BE6369C2DDD581AE400F3059F31DFB45 | ISSN: | 1743-9213 | ISBN: | 978-1107192454 | DOI: | 10.1017/S1743921317010511 | Bibcode ADS: | 2018IAUS..336...37S | Fulltext: | open |
È visualizzato nelle collezioni: | 3.01 Contributi in Atti di convegno |
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