New detections of OH sources towards the 6.7 GHz methanol masers

被引：12
|
作者：
Szymczak, M [1 ]
Kus, AJ [1 ]
机构：
[1] Nicholas Copernicus Univ, Torun Ctr Astron, PL-87100 Torun, Poland
来源：
ASTRONOMY & ASTROPHYSICS SUPPLEMENT SERIES | 2000年 / 147卷 / 02期
关键词：
masers; surveys; stars : formation; ISM : molecules; radio lines : ISM; HII regions;
D O I：
10.1051/aas:2000297
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
A sample of 6.7 GHz methanol masers has been searched for OH maser emission at 1665 and 1667 MHz using the 32 m Torun radio telescope. Eight new OH sources were detected. They are generally weak at radio and infrared wavelengths. In the northern hemisphere sample of 68 methanol sources the OH maser emission is associated with 49 sources. Generally OH masers do not arise in weak FIR sources. The ratio of OH to CH3OH maser flux densities increases for objects with blue FIR colour and probably reflects evolutionary changes in the star-forming regions.
引用
收藏
页码：181 / 185
页数：5
相关论文
共 50 条
  • [21] Variability studies of 6.7 GHz methanol masers at HartRAO
    Goedhart, S
    Gaylard, MJ
    van der Walt, DJ
    COSMIC MASERS: FROM PROTOSTARS TO BLACKHOLES, 2002, (206): : 131 - 134
  • [22] Absolute positions of 6.7-GHz methanol masers
    Xu, Y.
    Voronkov, M.A.
    Pandian, J.D.
    Li, J.J.
    Sobolev, A.M.
    Brunthaler, A.
    Ritter, B.
    Menten, K.M.
    Astronomy and Astrophysics, 2009, 507 (02): : 1117 - 1139
  • [23] A search for 6.7 GHz methanol masers in M33
    Goldsmith, Paul F.
    Pandian, Jagadheep D.
    Deshpande, Avinash A.
    ASTROPHYSICAL JOURNAL, 2008, 680 (02): : 1132 - 1136
  • [24] Techniques for Accurate Parallax Measurements for 6.7 GHz Methanol Masers
    Reid, M. J.
    Brunthaler, A.
    Menten, K. M.
    Sanna, A.
    Xu, Y.
    Li, J. J.
    Wu, Y.
    Hu, B.
    Zheng, X. W.
    Zhang, B.
    Immer, K.
    Rygl, K.
    Moscadelli, L.
    Sakai, N.
    Bartkiewicz, A.
    Choi, Y. K.
    ASTRONOMICAL JOURNAL, 2017, 154 (02):
  • [25] A comprehensive search for extragalactic 6.7-GHz methanol masers
    Phillips, CJ
    Norris, RP
    Ellingsen, SP
    Rayner, DP
    MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 1998, 294 (02) : 265 - 271
  • [26] A comprehensive search for extragalactic 6.7-GHz methanol masers
    Mon Not Royal Astron Soc, 2 (265):
  • [27] A radiation mechanism for interstellar methanol 6.7GHz masers
    Liu, HP
    Sun, J
    ASTROPHYSICS AND SPACE SCIENCE, 1997, 253 (02) : 305 - 312
  • [28] AMMONIA AND CO OUTFLOW AROUND 6.7 GHz METHANOL MASERS
    Li, F. C.
    Xu, Y.
    Wu, Y. W.
    Yang, J.
    Lu, D. R.
    Menten, K. M.
    Henkel, C.
    ASTRONOMICAL JOURNAL, 2016, 152 (04):
  • [29] European VLBI Network imaging of 6.7 GHz methanol masers
    Bartkiewicz, A.
    Szymczak, M.
    van Langevelde, H. J.
    ASTRONOMY & ASTROPHYSICS, 2016, 587
  • [30] Inferences from the kinematic properties of 6.7 GHz methanol masers
    van der Walt, D. J.
    Sobolev, A. M.
    Butner, H.
    ASTRONOMY & ASTROPHYSICS, 2007, 464 (03): : 1015 - 1022
12345