Results 181 to 190 of about 11,697 (215)

Galaxy Tomography with the Gravitational Wave Background from Supermassive Black Hole Binaries

Chen Y.
europepmc   +1 more source

Explaining recurring maser flares in the ISM through large-scale entangled quantum mechanical states. [PDF]

Sci Adv, 2017
Rajabi F, Houde M.
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Scientific objectives and payload configuration of the Chang'E-7 mission. [PDF]

Natl Sci Rev
Wang C, Jia Y, Xue C, Lin Y, Liu J, Fu X, Xu L, Huang Y, Zhao Y, Xu Y, Gao R, Wei Y, Tang Y, Yu D, Zou Y.   +14 more
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Astrometry of Southern radio sources

Astrophysics and Space Science, 1991
An overview is presented of a number of astrometry and astrophysics programs based on radio sources from the Parkes 2.7 GHz catalogues. The programs cover the optical identification and spectroscopy of flat-spectrum Parkes sources and the determination of their milliarc-second radio structures and positions.
G L, White, D L, Jauncey, B R, Harvey, A, Savage, S, Gulkis, R A, Preston, B A, Peterson, J E, Reynolds, G D, Nicolson, D F, Malin   +9 more
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Astrometry with Radio Interferometers

2000
This chapter summarizes the principles and tools of radio astronomy that ultimately lead to the establishment of a fundamental catalogue via application of the technique of radio interferometry to the measurement of positions of sources at cosmological distances.
Hans G. Walter, Ojars J. Sovers
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Review of radio astrometry I. Radio measurements

International Astronomical Union Colloquium, 1978
At the astrometry symposium held at Perth in 1973, the radio astronomers devoted much of their allocated time towards explaining the techniques used in radio astrometry. As further details are available in, for example, the review by Counselman, it now seems appropriate to consider the achievements that have been made since the last symposium.
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The Application of Radio Interferometers in Astrometry

International Astronomical Union Colloquium, 1975
AbstractAn account is given of the recent precision measurements of position of radio sources by VLBI and especially phase-stable interferometer systems of the 5 km radio telescope in Cambridge.A brief description of the 5 km. telescope is given as well as some of the remarkably accurate determinations of declination and right ascension of radio ...
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Review of radio astrometry II. Optical measurements

International Astronomical Union Colloquium, 1978
The establishment of an astronomical reference frame which is based on positions of extragalactic objects is an old problem of fundamental astronomy. Radio astrometry has now achieved a level of accuracy, which rivals the best optical work, thus openingexcitingprospects to reach this aim within a relatively short time scale.To take full advantage of ...
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SπRALS : Southern hemisphere parallax interferometric radio astrometry legacy survey

2021
The exact structure of the spiral arms of our home Galaxy, the Milky Way, is an unknown that can be resolved by a higher sampling of parallaxes to high mass star-forming regions from both the Northern and Southern Hemispheres. The Northern Hemisphere has been very well sampled by surveys like BeSSeL and the VERA key project, yet they are unable to ...
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Present status of radio astrometry with baselines ≤ 35 km

International Astronomical Union Colloquium, 1978
A summary of results for radio astrometry with baselines ≤ 35 km and priorities for future work are given.
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