Zobrazeno 1 - 10
of 62
pro vyhledávání: '"Lankhaar, B"'
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
Publikováno v:
A&A 686, A274 (2024)
Polarisation observations of masers in the circumstellar envelopes (CSEs) around Asymptotic Giant Branch (AGB) stars have revealed strong magnetic fields. However, masers probe only specific lines-of-sight through the CSE. Non-masing molecular line p
Externí odkaz:
http://arxiv.org/abs/2404.01681
Autor:
Levshakov, S. A., Agafonova, I. I., Henkel, C., Kim, Kee-Tae, Kozlov, M. G., Lankhaar, B., Yang, W.
We estimate limits on non-universal coupling of hypothetical hidden fields to standard matter by evaluating the fractional changes in the electron-to-proton mass ratio, mu = m_e/m_p, based on observations of ClassI methanol masers distributed in the
Externí odkaz:
http://arxiv.org/abs/2112.14560
We investigate the application of the conventional quasi-steady state maser modelling algorithm of Menegozzi & Lamb (ML) to the high field transient regime of the one-dimensional Maxwell-Bloch (MB) equations for a velocity distribution of atoms or mo
Externí odkaz:
http://arxiv.org/abs/2108.01164
Autor:
Vlemmings, W. H. T., Lankhaar, B., Cazzoletti, P., Ceccobello, C., Dall'Olio, D., van Dishoeck, E. F., Facchini, S., Humphreys, E. M. L., Persson, M. V., Testi, L., Williams, J. P.
Despite their importance in the star formation process, measurements of magnetic field strength in proto-planetary discs remain rare. While linear polarisation of dust and molecular lines can give insight into the magnetic field structure, only obser
Externí odkaz:
http://arxiv.org/abs/1904.01632
Autor:
Khouri, T., Velilla-Prieto, L., De Beck, E., Vlemmings, W. H. T., Olofsson, H., Lankhaar, B., Black, J. H., Baudry, A.
Publikováno v:
A&A 623, L1 (2019)
We report the detection and investigate the properties of high-excitation lambda-doubling line emission of hydroxyl (OH) detected towards three asymptotic giant branch (AGB) stars (W Hya, R Dor, and IK Tau) using ALMA. The OH lines are produced very
Externí odkaz:
http://arxiv.org/abs/1902.11033
Autor:
Dall'Olio, D., Vlemmings, W. H. T., Surcis, G., Beuther, H., Lankhaar, B., Persson, M. V., Richards, A. M. S., Varenius, E.
Publikováno v:
A&A 607, A111 (2017)
Context. The importance of the magnetic field in high-mass-star formation is not yet fully clear and there are still many open questions concerning its role in the accretion processes and generation of jets and outflows. In the past few years, masers
Externí odkaz:
http://arxiv.org/abs/1708.02961
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
Publikováno v:
Monthly Notices of the Royal Astronomical Society; Sep2024, Vol. 533 Issue 2, p1714-1732, 19p
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