Results 101 to 110 of about 11,697 (215)

On significance of VLBI/Gaia position offsets

, 2017
We have cross matched the Gaia Data Release 1 secondary dataset that contains positions of 1.14 billion objects against the most complete to date catalogue of VLBI positions of 11.4 thousand sources, almost exclusively active galactic nuclei.
Kovalev, Y. Y., Petrov, L.
core   +1 more source

Astrometry of Galactic Star Forming Region Sharpless 269 with VERA : Parallax Measurements and Constraint on Outer Rotation Curve

, 2007
We have performed high-precision astrometry of H2O maser sources in Galactic star forming region Sharpless 269 (S269) with VERA. We have successfully detected a trigonometric parallax of 189+/-8 micro-arcsec, corresponding to the source distance of 5.28 +
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., Shintani, Motonobu, Suda, Hiroshi, Tamura, Yoshiaki, Tsushima, Miyuki, Yamashita, Kazuyoshi   +30 more
core   +2 more sources

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

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

Multi-wavelength differential astrometry of the S5 polar cap sample

, 2004
We report on the status of our S5 polar cap astrometry program. Since 1997 we have observed all the 13 radio sources of the complete S5 polar cap sample at the wavelengths of 3.6 cm, 2 cm and 7 mm. Images of the radio sources at 3.6 and 2 cm have already
Guirado, J. C., Marcaide, J. M., Marti-Vidal, I., Perez-Torres, M. A., Ros, E.   +4 more
core  

Optical-uv spectrum and proper motion of the middle-aged pulsar b1055-52

, 2010
PSRB1055-52 is a middle-aged (~535 kyr) radio, X-ray, and gamma-ray pulsar showing X-ray thermal emission from the neutron star (NS) surface. A candidate optical counterpart to PSRB1055-52 was proposed by Mignani and coworkers based on Hubble Space ...
Abdo, Apellánez, Becker, Bignami, Brinkmann, Brisken, Caraveo, Caraveo, Cordes, De Luca, de Zeeuw, G. G. Pavlov, Greiveldinger, Guillemot, Høg, Kaplan, Kargaltsev, Kargaltsev, Lasker, Lattanzi, Manchester, Manchester, Mignani, Mignani, Monet, Newton, Nota, O. Kargaltsev, Pavlov, Pavlov, Pavlov, Pavlov, Perryman, Predehl, R. P. Mignani, Roeser, Seaton, Shibanov, Skrutskie, Thompson, Vande Putte, Vaughan, Wang, Zacharias, Zacharias, Zavlin   +45 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

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

87th Annual Meeting of the Meteoritical Society 2025: Abstracts

Meteoritics &Planetary Science, Volume 60, Issue S1, Page 30-350, August 2025.
wiley   +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