Zobrazeno 1 - 10
of 81
pro vyhledávání: '"A. Aberfelds"'
We present the results of a 5-year monitoring program of 42 sources targeted at 6.7 GHz methanol masers, conducted from March 2017 to October 2022 using the Irbene 32 and 16 meter radio telescopes. Sources were observed with irregular intervals where
Externí odkaz:
http://arxiv.org/abs/2310.08273
Autor:
Aberfelds, A, Bartkiewicz, A, Szymczak, M, Šteinbergs, J, Surcis, G, Kobak, A, Durjasz, M, Shmeld, I
Publikováno v:
MNRAS, Volume 524, Issue 1, September 2023, Pages 599-618
{The variability study of 6.7\,GHz methanol masers has become a useful way to improve our understanding of the physical conditions in high-mass star-forming regions.} {Based on the single-dish monitoring using the Irbene telescopes, we selected three
Externí odkaz:
http://arxiv.org/abs/2307.03663
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:
Salii, Svetlana V., Zinchenko, Igor I., Liu, Sheng-Yuan, Sobolev, Andrej M., Aberfelds, Artis, Su, Yu-Nung
We present results of the investigations of the properties of the methanol $J_1 - J_0$ A$^{-+}$ line series motivated by the recent serendipitous detection of the maser emission in the $14_1 - 14_0$ A$^{-+}$ line at 349~GHz in S255IR-SMA1 soon after
Externí odkaz:
http://arxiv.org/abs/2203.09150
Autor:
Patoka, O., Antyufeyev, O., Shmeld, I., Bezrukovs, V., Bleiders, M., Orbidans, A., Aberfelds, A., Shulga, V.
Publikováno v:
A&A 652, A17 (2021)
Aims.Molecular masers, including methanol and hydroxyl masers, and in particular the ones in excited rotational states (ex-OHmasers), are one of the most informative tools for studying star-forming regions. So, the discovery, of new maser sources in
Externí odkaz:
http://arxiv.org/abs/2106.11585
Autor:
R. A. Burns, Y. Uno, N. Sakai, J. Blanchard, Z. Rosli, G. Orosz, Y. Yonekura, Y. Tanabe, K. Sugiyama, T. Hirota, Kee-Tae Kim, A. Aberfelds, A. E. Volvach, A. Bartkiewicz, A. Caratti o Garatti, A. M. Sobolev, B. Stecklum, C. Brogan, C. Phillips, D. A. Ladeyschikov, D. Johnstone, G. Surcis, G. C. MacLeod, H. Linz, J. O. Chibueze, J. Brand, J. Eislöffel, L. Hyland, L. Uscanga, M. Olech, M. Durjasz, O. Bayandina, S. Breen, S. P. Ellingsen, S. P. van den Heever, T. R. Hunter, X. Chen
Publikováno v:
Nature Astronomy. 7:557-568
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
Publikováno v:
Proceedings of the International Astronomical Union. Dec2022, Vol. 18 Issue S380, p240-242. 3p.
Autor:
Aberfelds, Artis1 artis.aberfelds@venta.lv, Bartkiewicz, Anna2, Šteinbergs, Jānis1, Shmeld, Ivar1
Publikováno v:
Proceedings of the International Astronomical Union. Dec2022, Vol. 18 Issue S380, p199-201. 3p.
Autor:
Tomoya Hirota, Pawel Wolak, Todd R Hunter, Crystal L Brogan, Anna Bartkiewicz, Michal Durjasz, Agnieszka Kobak, Mateusz Olech, Marian Szymczak, Ross A Burns, Artis Aberfelds, Giseon Baek, Jan Brand, Shari Breen, Do-Young Byun, Alessio Caratti o Garatti, Xi Chen, James O Chibueze, Claudia Cyganowski, Jochen Eislöffel, Simon Ellingsen, Naomi Hirano, Bo Hu, Ji-hyun Kang, Jeong-Sook Kim, Jungha Kim, Kee-Tae Kim, Mi Kyoung Kim, Busaba Kramer, Jeong-Eun Lee, Hendrik Linz, Tie Liu, Gordon MacLeod, Tiege P McCarthy, Karl Menten, Kazuhito Motogi, Chung-Sik Oh, Gabor Orosz, Andrey M Sobolev, Bringfried Stecklum, Koichiro Sugiyama, Kazuyoshi Sunada, Lucero Uscanga, Fanie van den Heever, Alexandr E Volvach, Larisa N Volvach, Yuan Wei Wu, Yoshinori Yonekura
Publikováno v:
Publications of the Astronomical Society of Japan. 74:1234-1262
In 2019 September, a sudden flare of the 6.7 GHz methanol maser was observed toward the high-mass young stellar object (HMYSO) G24.33+0.14. This may represent the fourth detection of a transient mass accretion event in an HMYSO after S255IR NIRS3, NG
Publikováno v:
Monthly Notices of the Royal Astronomical Society; Dec2023, Vol. 526 Issue 4, p5699-5714, 16p