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
  • [1] New detections of HC5N towards hot cores associated with 6.7 GHz methanol masers
    Green, C. -E.
    Green, J. A.
    Burton, M. G.
    Horiuchi, S.
    Tothill, N. F. H.
    Walsh, A. J.
    Purcell, C. R.
    Lovell, J. E. J.
    Millar, T. J.
    MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2014, 443 (03) : 2252 - 2263
  • [2] 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
  • [3] 12.2 GHz survey towards 6.7 GHz methanol masers - A comparison of 12.2 GHz and 6.7 GHz spectra
    Blaszkiewicz, L
    Kus, AJ
    ASTRONOMY & ASTROPHYSICS, 2004, 413 (01): : 233 - 240
  • [4] Resolving distance ambiguities towards 6.7 GHz methanol masers
    Pandian, J. D.
    Momjian, E.
    Goldsmith, P. F.
    ASTRONOMY & ASTROPHYSICS, 2008, 486 (01) : 191 - 208
  • [5] 6.7 GHz methanol masers associated with IRAS-selected sources
    MacLeod, GC
    Gaylard, MJ
    Galt, J
    Moriarty-Schieven, GH
    ASTRONOMICAL JOURNAL, 1998, 116 (06): : 2936 - 2942
  • [6] 12.2-GHZ METHANOL AND 1.6-GHZ HYDROXYL MASERS ASSOCIATED WITH NEW 6.7-GHZ METHANOL MASERS
    GAYLARD, MJ
    MACLEOD, GC
    VANDERWALT, DJ
    MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 1994, 269 (02) : 257 - 264
  • [7] Trigonometric parallaxes of 6.7 GHz methanol masers
    Rygl, K. L. J.
    Brunthaler, A.
    Reid, M. J.
    Menten, K. M.
    van Langevelde, H. J.
    Xu, Y.
    ASTRONOMY & ASTROPHYSICS, 2010, 511
  • [8] Medicina survey of methanol masers at 6.7 GHz
    Slysh, V.I.
    Val'tts, I.E.
    Kalenskii, S.V.
    Voronkov, M.A.
    Palagi, F.
    Tofani, G.
    Catarzi, M.
    Astronomy and Astrophysics Supplement Series, 134 (01): : 115 - 128
  • [9] The Medicina survey of methanol masers at 6.7 GHz
    Slysh, VI
    Val'tts, IE
    Kalenskii, SV
    Voronkov, MA
    Palagi, F
    Tofani, G
    Catarzi, M
    ASTRONOMY & ASTROPHYSICS SUPPLEMENT SERIES, 1999, 134 (01): : 115 - 128
  • [10] ATLASGAL - environments of 6.7 GHz methanol masers
    Urquhart, J. S.
    Moore, T. J. T.
    Schuller, F.
    Wyrowski, F.
    Menten, K. M.
    Thompson, M. A.
    Csengeri, T.
    Walmsley, C. M.
    Bronfman, L.
    Koenig, C.
    MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2013, 431 (02) : 1752 - 1776
12345