Results 41 to 50 of about 4,855 (170)

Identification of Very Red Counterparts of SiO Maser and OH/IR Objects in the GLIMPSE Survey

, 2007
Using the 3.6/4.5/5.8/8.0 micron images with 1.2 arcsec pixel resolution from the Spitzer/GLIMPSE survey, we investigated 23 masing and 18 very red objects that were not identified in the 2MASS survey.
David P., Deguchi S., Deguchi S., Deguchi S., Deguchi S., Deguchi S., Deguchi S., Deguchi S., Deguchi S., Engels D., Engels D., Gomez Y., Gomez Y., Herman J., Jun‐ichi Nakashima, Kwok S., Likkel L., Lintel Hekkert P., Lorenz-Martins S., Morita K., Morris M. R., Nakashima J., Nakashima J., Nakashima J., Nicolas Koning, Nordhaus J., Nyman L., Shuji Deguchi, Sun Kwok, van der Veen W. E. C. J., van Hoof P. A. M.   +30 more
core   +1 more source

Molecular and Ionic shocks in the Supernova Remnant 3C391 [PDF]

, 2001
New observations of the supernova remnant 3C391 are in the H2 2.12 micron and [Fe II] 1.64 micron narrow-band filters at the Palomar 200-inch telescope, and in the 5-15 micron CVF on ISOCAM.
Abergel A., Arikawa Y., Bacmann A., Cesarsky C., Cesarsky D., Cesarsky D., Cesarsky D., Desert F.-X., Jeonghee Rho, Kessler M. F., Leger A., Pierre‐Olivier Lagage, Reach W. T., Reach W. T., T. H. Jarrett, White G. J., William T. Reach   +16 more
core   +3 more sources

Discovery of Pulsed OH Maser Emission Stimulated by a Pulsar [PDF]

, 2005
Stimulated emission of radiation has not been directly observed in astrophysical situations up to this time. Here we demonstrate that photons from pulsar B1641-45 stimulate pulses of excess 1720 MHz line emission in an interstellar OH cloud.
Johnston, Simon, Koribalski, Baerbel, Stanimirovic, Snezana, Weisberg, Joel M.   +3 more
core   +4 more sources

5 cm OH Masers in Northern Star Formation Regions

The Astronomical Journal
We present a 6.0 GHz excited-state OH maser survey toward 155 northern star formation regions utilizing the Shanghai Tianma Radio Telescope. In total, we detect 44 6.0 GHz OH masers, 8 of which are new detections (one at 6016 MHz, two at 6030 MHz, and ...
Hai-Hua Qiao, Xu-Jia Ouyang, Zhi-Qiang Shen, Shari L. Breen, Kai Yang, Xi Chen, Juan Li   +6 more
doaj   +1 more source

A Review of Maser Polarization and Magnetic Fields [PDF]

, 2007
Through polarization observations masers are unique probes of the magnetic field in a variety of different astronomical objects, with the different maser species tracing different physical conditions.
Baudry, Cotton, Desmurs, Ellingsen, Fiebig, Gómez, Herpin, Szymczak, Vlemmings, Vlemmings, Vlemmings, Vlemmings, W. H. T. Vlemmings, Wiesemeyer, Woitke   +14 more
core   +1 more source

NE2025: An Updated Electron Density Model for the Galactic Interstellar Medium

The Astrophysical Journal
Free electrons in the Galactic interstellar medium (ISM) disperse and scatter coherent radio waves, by amounts that depend on the distance to the radio source.
Stella Koch Ocker, James M. Cordes
doaj   +1 more source

Different studies of the global pitch angle of the Milky Way's spiral arms

, 2015
There are many published values for the pitch angle of individual spiral arms, and their wide distribution (from -3 to -28 degrees) begs for various attempts for a single value.
Vallee, Jacques P
core   +1 more source

Enhanced OH in C-type shock waves in molecular clouds [PDF]

, 1999
Cosmic-ray and X-ray ionisations in molecular gas produce a weak far-ultraviolet flux through the radiative decay of H2 molecules that have been excited by collisions with energetic electrons (the Prasad-Tarafdar mechanism). I consider the effect of this
Liseau R., Mark Wardle, Pastchenko M. I.
core   +2 more sources

Photodissociation-region models of interstellar hydroxyl masers [PDF]

Monthly Notices of the Royal Astronomical Society, 1991
Dense warm photodissociation regions are possible sites for the formation of interstellar hydroxyl masers. The column densities of OH are calculated in dense equilibrium photodissociation regions which form in the vicinity of early-type stars.
T. W. Hartquist, A. Sternberg
openaire   +1 more source

Methanol Line Diagnostics of Post-burst Physical Evolution in the High-mass Episodic Accretion Source G358.93−0.03

The Astrophysical Journal
We report multi-epoch Atacama Large Millimeter/submillimeter Array Band 5–7 observations of the high-mass episodic-accretion burst source G358.93−0.03, covering (sub-)millimeter CH _3 OH masers, quasi-thermal lines, and continuum from 2019 April to 2022 ...
Meizhu Liu, Xi Chen, Yan-Kun Zhang, Shi-Min Song   +3 more
doaj   +1 more source