Zobrazeno 1 - 10
of 92
pro vyhledávání: '"Bayandina, O."'
Autor:
Agafonova, I. I., Bayandina, O. S., Gong, Y., Henkel, C., Kim, Kee-Tae, Kozlov, M. G., Lankhaar, B., Levshakov, S. A., Menten, K. M., Ubachs, W., Val'tts, I. E., Yang, W.
We present results on simultaneous observations of Class~I methanol masers at 25, 36, and 44 GHz towards 22 Galactic targets carried out with the Effelsberg 100-m telescope. The study investigates relations between the hyperfine (HF) structure of the
Externí odkaz:
http://arxiv.org/abs/2407.11657
Autor:
Szabó, Zs. M., Gong, Y., Yang, W., Menten, K. M., Bayandina, O. S., Cyganowski, C. J., Kóspál, Á., Ábrahám, P., Belloche, A., Wyrowski, F.
FU Orionis (FUor) and EX Lupi (EXor) type objects are two groups of peculiar and rare pre-main sequence low-mass stars that are undergoing powerful accretion outbursts during their early stellar evolution. Water masers are widespread in star forming
Externí odkaz:
http://arxiv.org/abs/2305.00736
Autor:
Burns, R. A., Uno, Y., Sakai, N., Blanchard, J., Rosli, Z., Orosz, G., Yonekura, Y., Tanabe, Y., Sugiyama, K., Hirota, T., Kim, Kee-Tae, Aberfelds, A., Volvach, A. E., Bartkiewicz, A., Garatti, A. Caratti o, Sobolev, A. M., Stecklum, B., Brogan, C., Phillips, C., Ladeyschikov, D. A., Johnstone, D., Surcis, G., MacLeod, G. C., Linz, H., Chibueze, J. O., Brand, J., Eislöffel, J., Hyland, L., Uscanga, L., Olech, M., Durjasz, M., Bayandina, O., Breen, S., Ellingsen, S. P., Heever, S. P. van den, Hunter, T. R., Chen, X.
High-mass protostars (M$_{\star} >$ 8 M$_{\odot}$) are thought to gain the majority of their mass via short, intense bursts of growth. This episodic accretion is thought to be facilitated by gravitationally unstable and subsequently inhomogeneous acc
Externí odkaz:
http://arxiv.org/abs/2304.14740
Autor:
Kobak, A., Bartkiewicz, A., Szymczak, M., Olech, M., Durjasz, M., Wolak, P., Chibueze, J. O., Hirota, T., Eislöffel, J., Stecklum, B., Sobolev, A., Bayandina, O., Orosz, G., Burns, R. A., Kim, Kee-Tae, Heever, S. P. van den
Publikováno v:
A&A 671, A135 (2023)
Recent studies have shown that 6.7 GHz methanol maser flares can be a powerful tool for verifying the mechanisms of maser production and even the specific signatures of accretion rate changes in the early stages of high-mass star formation. We charac
Externí odkaz:
http://arxiv.org/abs/2302.02723
Autor:
Bayandina, O. S., Brogan, C. L., Burns, R. A., Garatti, A. Caratti o, Chibueze, J. O., Heever, S. P. van den, Kurtz, S. E., MacLeod, G. C., Moscadelli, L., Sobolev, A. M., Sugiyama, K., Val'tts, I. E., Yonekura, Y.
Publikováno v:
A&A 664, A44 (2022)
The massive young stellar object (MYSO) G358.93-0.03-MM1 showed an extraordinary near-infrared- to (sub-)millimetre-dark and far-infrared-loud accretion burst, which is closely associated with flares of several class II methanol maser transitions, an
Externí odkaz:
http://arxiv.org/abs/2206.12119
Autor:
Szabó, Zs. M., Bayandina, O., Kóspál, Á., Ábrahám, P., Gabányi, K. É., Nagy, Zs., Tóth, V. L., Heever, S. P. van den
We present the project of a VLBI study of the 22 GHz H$_2$O maser in a prototypical low-mass protostellar system IRAS 16293-2422. The observation was conducted to characterise the cause of the newly discovered enhanced maser activity in the source an
Externí odkaz:
http://arxiv.org/abs/2204.12910
Autor:
Bayandina, O. S., Brogan, C. L., Burns, R. A., Chen, X., Hunter, T. R., Kurtz, S. E., MacLeod, G. C., Sobolev, A. M., Sugiyama, K., Val'tts, I. E., Yonekura, Y.
Publikováno v:
The Astronomical Journal, 163:83 (16pp), 2022 February
We present the most complete to date interferometric study of the centimeter wavelength methanol masers detected in G358.93-0.03 at the burst and post-burst epochs. A unique, NIR/(sub)mm-dark and FIR-loud MYSO accretion burst was recently discovered
Externí odkaz:
http://arxiv.org/abs/2201.12075
Autor:
Stecklum, B., Wolf, V., Linz, H., Garatti, A. Caratti o, Schmidl, S., Klose, S., Eislöffel, J., Fischer, Ch., Brogan, C., Burns, R., Bayandina, O., Cyganowski, C., Gurwell, M., Hunter, T., Hirano, N., Kim, K. -T., MacLeod, G., Menten, K. M., Olech, M., Orosz, G., Sobolev, A., Sridharan, T. K., Surcis, G., Sugiyama, K., van der Walt, J., Volvach, A., Yonekura, Y.
Publikováno v:
A&A 646, A161 (2021)
Class II methanol masers are signs of massive young stellar objects (MYSOs). Recent findings show that MYSO accretion bursts cause flares of these masers. Thus, maser monitoring can be used to identify such bursts. Burst-induced SED changes provide v
Externí odkaz:
http://arxiv.org/abs/2101.01812
We present a study of the association between class I methanol masers and cold dust clumps from the ATLASGAL survey. It was found that almost 100% of class I methanol masers are associated with objects listed in the ATLASGAL compact source catalog. W
Externí odkaz:
http://arxiv.org/abs/2009.07474
Autor:
Burns, R. A., Orosz, G., Bayandina, O., Surcis, G., Olech, M., MacLeod, G., Volvach, A., Rudnitskii, G., Hirota, T., Immer, K., Blanchard, J., Marcote, B., van Langevelde, H. J., Chibueze, J. O., Sugiyama, K., Kim, Kee-Tae, Val`tts, I., Shakhvorostova, N., Kramer, B., Baan, W. A., Brogan, C., Hunter, T., Kurtz, S., Sobolev, A. M., Brand, J., Volvach, L.
This paper reports observations of a 22 GHz water maser `superburst' in the G25.65+1.05 massive star forming region, conducted in response to an alert from the Maser Monitoring Organisation (M2O). Very long baseline interferometry (VLBI) observations
Externí odkaz:
http://arxiv.org/abs/1911.12634