Excited-State OH Main-Line Masers in AU Geminorum and NML Cygni
نویسندگان
چکیده
منابع مشابه
Pumping of OH Main-Line Masers in Star-Forming Regions
Pumping routes of masers can in principle be recovered from a small matrix of master equations, at an advanced stage of elimination, by tracing back the coefficients to a set of unmodified all-process rate coefficients, drawn from those which appeared in the original set of master equations, prior to any elimination operations. The traceback is achieved by logging the operations carried out on ...
متن کاملOh Satellite Line Masers and an Agn Candidate in M82
We report the detection of OH satellite line masers at 1720 MHz and 1612 MHz from the nuclear region of the starburst galaxy M82. The observations were aimed at detecting 1720 MHz maser emission from the known radio emitting SNR in the nuclear region. At 1720 MHz we detect six features above the 5σ limit set by noise, four in emission and two in absorption. Three of the emission features appear...
متن کاملOh Satellite Line Masers in the Nucleus of Ngc 253
We report the detection of 1720 and 1612 MHz OH ground–state satellite line maser regions in the starburst galaxy NGC 253. We find ten compact maser features all of which are located along the narrow ridge of bright radio continuum emission within the central 10 square arcseconds of the nucleus. The compact OH features appear physically associated with regions of dense molecular gas, supernova ...
متن کاملOh Masers in G11.904−0.141
The massive star-forming region G11.904−0.141 is one of only 11 sources to show maser emission in the highly-excited 13441 MHz transition of OH. but the 13441 MHz masers are not detected. Consistent magnetic field strengths of approximately +3.5 mG are detected in the ground-state masers, in contrast with a possible −3.0 mG magnetic field previously detected at 13441 MHz. The variable 13441 MHz...
متن کاملNonuniform Dust Outflow Observed around Infrared Object Nml Cygni
Measurements by the University of California Berkeley Infrared Spatial Interferometer at 11.15 km have yielded strong evidence for multiple dust shells and/or signiÐcant asymmetric dust emission around NML Cyg. New observations reported also include multiple 8È13 km spectra taken from 1994È1995 and N-band (10.2 km) photometry from 1980È1992. These and past measurements are analyzed and Ðtted to...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 2007
ISSN: 0004-637X,1538-4357
DOI: 10.1086/521827