12.2 GHz survey towards 6.7 GHz methanol masers - A comparison of 12.2 GHz and 6.7 GHz spectra

被引：35
|
作者：
Blaszkiewicz, L [1 ]
Kus, AJ [1 ]
机构：
[1] Nicholas Copernicus Univ, Torun Ctr Astron, PL-87100 Torun, Poland
来源：
ASTRONOMY & ASTROPHYSICS | 2004年 / 413卷 / 01期
关键词：
masers; surveys; stars : formation; ISM : molecules; radio lines : ISM; ISM : HII regions;
D O I：
10.1051/0004-6361:20031451
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We present results of a 12.2 GHz methanol maser survey done with the Torun 32 m radio telescope. We examined 261 star forming-sites, known as containing 6.7 GHz maser emission sources. The survey resulted in 49 sources with maser line detection, with 21 previously unknown emissions. All detected 12.2 GHz masers have been observed at the 6.7 GHz transition. Only one 12.2 GHz source had no 6.7 GHz counterpart. We compared basic spectral line properties at both transitions. In a few cases we observed absorption features and emitting counterparts in the other monitored frequency, at the same velocity.
引用
收藏
页码：233 / 240
页数：8
相关论文
共 50 条
  • [31] 12.2 GHZ METHANOL ABSORPTION TOWARDS SGR-A
    PENG, RS
    WHITEOAK, JB
    PROCEEDINGS ASTRONOMICAL SOCIETY OF AUSTRALIA, 1989, 8 (02): : 204 - 206
  • [32] 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
  • [33] A Radiation Mechanism for Interstellar Methanol 6.7GHz Masers
    Liu Hanping
    Sun Jin
    Astrophysics and Space Science, 1997, 253 : 305 - 312
  • [34] Inferences from the kinematic properties of 6.7 GHz methanol masers
    Van Der Walt, D.J.
    Sobolev, A.M.
    Butner, H.
    Astronomy and Astrophysics, 2007, 464 (03): : 1015 - 1022
  • [35] A radiation mechanism for interstellar methanol 6.7GHz masers
    Liu, HP
    Sun, J
    ASTROPHYSICS AND SPACE SCIENCE, 1997, 253 (02) : 305 - 312
  • [36] 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):
  • [37] European VLBI Network imaging of 6.7 GHz methanol masers
    Bartkiewicz, A.
    Szymczak, M.
    van Langevelde, H. J.
    ASTRONOMY & ASTROPHYSICS, 2016, 587
  • [38] The VLBI Imaging Survey of the 6.7 GHz Methanol Masers using the JVN/EAVN
    Sugiyama, K.
    Fujisawa, K.
    Hachisuka, K.
    Yonekura, Y.
    Motogi, K.
    Honma, M.
    Hirota, T.
    Sawada-Satoh, S.
    Niinuma, K.
    Murata, Y.
    Doi, A.
    Ogawa, H.
    Shen, Z. -Q.
    NEW TRENDS IN RADIO ASTRONOMY IN THE ALMA ERA: THE 30TH ANNIVERSARY OF NOBEYAMA RADIO OBSERVATORY, 2013, 476 : 347 - 348
  • [39] VLA observations of water masers towards 6.7 GHz methanol maser sources
    Bartkiewicz, A.
    Szymczak, M.
    Pihlstroem, Y. M.
    van Langevelde, H. J.
    Brunthaler, A.
    Reid, M. J.
    ASTRONOMY & ASTROPHYSICS, 2011, 525
  • [40] Continuum emission associated with 6.7-GHz methanol masers
    Ellingsen, SP
    Norris, RP
    McCulloch, PM
    MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 1996, 279 (01) : 101 - 107
12345