Results 101 to 110 of about 11,731 (215)

Space Radio Astronomy in the next 1000001 (binary) years

, 2012
Radio astronomy and active exploration of space are peers: both began by efforts of enthusiasts in the 1930s and got a major technological boost in the 1940s-50s.
Gurvits, L. I.
core   +1 more source

A Radio Flaring, Chromospherically Inactive K Dwarf

The Astrophysical Journal
We report on an unusual radio source (J180526−292953), initially identified as a steep spectrum, polarized point source toward the Galactic bulge and found to coincide with the nearby K dwarf HD 317101A.
Dale A. Frail, Scott D. Hyman, Michele L. Silverstein, Emil Polisensky, Evangelia Tremou, Simona Giacintucci, Hodari-Sadiki Hubbard-James, Jacinda Byam, Steve B. Howell, Robert F. Wilson, Matthew Lastovka, Tracy E. Clarke, Namir E. Kassim   +12 more
doaj   +1 more source

Opacity in compact extragalactic radio sources and its effect on astrophysical and astrometric studies

, 2008
The apparent position of the "core" in a parsec-scale radio jet (a compact, bright emitting region at the narrow end of the jet) depends on the observing frequency, owing to synchrotron self-absorption and external absorption.
A. B. Pushkarev, A. P. Lobanov, Afanasiev, Beasley, Bietenholz, Blandford, Blandford, Bloom, Böttcher, Charlot, Cohen, Croke, Fey, Fey, Fey, Fomalont, Frey, Hirotani, Hirotani, Homan, Hutter, J. A. Zensus, Jennison, Johnston, Junor, Kadler, Kellermann, Kovalev, Kovalev, Kovalevsky, Königl, Lara, Lestrade, Lindegren, Lobanov, Lobanov, Lobanov, Lobanov, Lobanov, Ma, Marcaide, Marscher, Peterson, Petrov, Petrov, Readhead, Shao, Souchay, Sowards-Emmerd, Vermeulen, Véron-Cetty, Walker, Y. Y. Kovalev   +52 more
core   +1 more source

Radio Interferometric Planet Search II: Constraints on sub-Jupiter-Mass Companions to GJ 896A

, 2011
We present results from the Radio Interferometric Planet (RIPL) search for compan- ions to the nearby star GJ 896A. We present 11 observations over 4.9 years.
Adam Fries, Alberto Bolatto, Bennett, Benz, Borucki, Boss, Bower, Bower, Butler, Endl, Eric B. Ford, Fomalont, Forbrich, Gagne, Geoffrey C. Bower, Gould, Ida, Jackson, Johnson, Karol Sanchez, Kraus, Laughlin, Lestrade, Loinard, Mason, Muterspaugh, Pallavicini, Paul Kalas, Phoebe Sanderbeck, Sandstrom, Torres, Vincent Viscomi, Xu   +32 more
core   +1 more source

Astrometry of Water Maser Sources in Nearby Molecular Clouds with VERA - II. SVS 13 in NGC 1333

, 2007
We report on the results of multi-epoch VLBI observations with VERA (VLBI Exploration of Radio Astrometry) of the 22 GHz H2O masers associated with the young stellar object SVS 13 in the NGC 1333 region.
Bushimata, Takeshi, Choi, Yoon Kyung, Hirota, Tomoya, Honma, Mareki, Imai, Hiroshi, Iwadate, Kenzaburo, Jike, Takaaki, Kameya, Osamu, Kamohara, Ryuichi, Kan-ya, Yukitoshi, Kawaguchi, Noriyuki, Kijima, Masachika, Kobayashi, Hideyuki, Kuji, Seisuke, Kurayama, Tomoharu, Manabe, Seiji, Miyaji, Takeshi, Nagayama, Takumi, Nakagawa, Akiharu, Oh, Chung Sik, Omodaka, Toshihiro, Oyama, Tomoaki, Sakai, Satoshi, Sasao, Tetsuo, Sato, Katsuhisa, Shibata, Katsunori M., Tamura, Yoshiaki, Yamashita, Kazuyoshi   +27 more
core   +1 more source

First Detection of CH3OD in Prestellar Cores

The Astrophysical Journal
The isotopic ratios of deuterated methanol derived around protostars are commonly used to infer the physical conditions under which they formed in the earlier prestellar stage.
Beatrice M. Kulterer, Asunción Fuente, Maria N. Drozdovskaya, Silvia Spezzano, Gisela Esplugues, David Navarro-Almaida, Marina Rodríguez Baras, Angèle Taillard, Karin Öberg   +8 more
doaj   +1 more source

Radio astrometry from the Moon [PDF]

An array of three radio telescopes on the Moon, separated by 100-1000 km, could measure the positions of compact radio sources 50-100 times more accurately than can be done on Earth.
Linfield, R. P.
core   +1 more source

Innovative approach for modelling gravity-induced signal path variations of VLBI radio telescopes

Earth, Planets and Space
Gravitationally induced deformation of the receiving unit of radio telescopes used for Very Long Baseline Interferometry (VLBI) distorts the observations and biases the deduced products.
Michael Lösler, Cornelia Eschelbach, Ansgar Greiwe, Boye Zhou, Lucia McCallum   +4 more
doaj   +1 more source

Fermi Unassociated Sources in the MeerKAT Absorption Line Survey

The Astrophysical Journal
Over 2000 γ -ray sources identified by the Large Area Telescope on NASA's Fermi Gamma-ray Space Telescope are considered unassociated, meaning that they have no known counterparts in any other frequency regime.
Morgan Himes, Preshanth Jagannathan, Dale A. Frail, Frank Schinzel, Neeraj Gupta, S. A. Balashev, F. Combes, P. P. Deka, H.-R. Klöckner, E. Momjian, J. D. Wagenveld   +10 more
doaj   +1 more source

Origin and Evolution of Enceladus's Tidal Dissipation. [PDF]

Space Sci Rev, 2023
Nimmo F, Neveu M, Howett C.
europepmc   +1 more source