Results 61 to 70 of about 1,279 (175)
Class I methanol masers: masers with extended green objects
, 2009 We have compared the results of a number of published class I methanol maser surveys with the catalogue of high-mass outflow candidates identified from the Galactic Legacy Infrared Mid-Plane Survey Extraordinaire survey (known as extended green objects ...
Chen, X (6446246) +2 more
core
Maser Activity of Organic Molecules toward Sgr B2(N)
The Astrophysical JournalAt centimeter wavelengths, single-dish observations have suggested that the Sagittarius (Sgr) B2 molecular cloud at the Galactic Center hosts weak maser emission from several organic molecules, including CH _2 NH, HNCNH, and HCOOCH _3 . However, the lack
Ci Xue +7 more
doaj +1 more source
MOLÉCULES ET MASERS INTERSTELLAIRES
, 1978 L'observation de la raie 21-cm de l'hydrogène atomique (HI) a longtemps été le seul moyen d'investigation de la composante neutre du gaz interstellaire. L'étude des nuages denses et sombres, où l'hydrogène est en majeure partie moléculaire, a été rendue ...
J. GUIBERT, NGUYEN-Q-RIEU
core +1 more source
Detections of Compact Radio Continuum toward Methanol Maser Rings Using the VLA
The Astrophysical JournalHigh-mass protostars are deeply embedded in dust inside their natal cores and are not easily detectable. However, maser emission at centimeter wavelengths, owing to its high brightness, enables us to study gas kinematics in protostars’ circumstellar ...
Anna Bartkiewicz +7 more
doaj +1 more source
, 2005 1720 MHz OH masers have been detected towards a number of supernova remnants (SNRs) at the shock interface where the SNR slams into the interstellar medium.
De Witt, Aletha
core
Interstellar H\u3csub\u3e2\u3c/sub\u3eO Masers from J Shocks
, 2013 We present a model in which the 22 GHz H2O masers observed in star-forming regions occur behind shocks propagating in dense regions (preshock density n 0 ~ 106-108 cm–3).
Elitzur, Moshe +2 more
core +1 more source
Polarization Observations of a Sample of 6.7 GHz Methanol Masers
The Astrophysical JournalSpectra of 6.7 GHz methanol masers from 21 pointings of known star-forming regions are reported. C -band observations, using the Green Bank Telescope in full Stokes mode, have measured how polarization properties vary across the maser profiles in each ...
Paul Fallon, Derck P. Smits
doaj +1 more source
OBSERVATIONS OF 25 GHz METHANOL MASERS IN W51A
, 2023 High mass stars are important because they alone are responsible for creating the heavy elements in the Universe. The observation of high mass star formation remains a challenging problem in astronomy because high mass stars form in densely clustered ...
Wagstaff, Peter
core
CO observations toward supernova remnants with associated OH 1720 MHz masers [PDF]
, 2000 The environs of three supernova remnants (SNRs) with associated OH 1720 MHz masers, G349.7 + 0.2, CTB 37A, and G16.7 + 0.1, have been surveyed in the CO J = 1-0 transition with the 12 Meter Telescope of the NRAO, using the on-the-fly technique.
Reynoso, Estela Marta +1 more
core +1 more source
On the Structure of the Sagittarius Spiral Arm in the Inner Milky Way
The Astronomical JournalWe report measurements of trigonometric parallax and proper motion for two 6.7 GHz methanol and two 22 GHz water masers located in the far portion of the Sagittarius spiral arm as part of the BeSSeL Survey.
S. B. Bian +8 more
doaj +1 more source