Results 1 to 10 of about 42,685 (271)

Faint objects in motion: the new frontier of high precision astrometry [PDF]

Experimental astronomy (Print), 2021
Sky survey telescopes and powerful targeted telescopes play complementary roles in astronomy. In order to investigate the nature and characteristics of the motions of very faint objects, a flexibly-pointed instrument capable of high astrometric accuracy ...
F. Malbet, Céline Bœhm, A. Krone-Martins, A. Amorim, G. Anglada‐Escudé, A. Brandeker, F. Courbin, T. A. Enßlin, António J. Falcão, Katherine Freese, Berry Holl, Lucas Labadie, Alain Léger, G. A. Mamon, B. McArthur, Alcione Mora, Mike Shao, A. Sozzetti, Douglas Spolyar, E. Villaver, U. Abbas, C. Albertus, J. Alves, Rory Barnes, A. S. Bonomo, H. Bouy, Warren R. Brown, Vítor Cardoso, M. Castellani, L. Chemin, Hamish A. Clark, A. C. M. Correia, M. Crosta, Antoine Crouzier, M. Damasso, Jeremy Darling, M. B. Davies, Antonaldo Diaferio, M. Fortin, M. Fridlund, M. Gai, P. García, Oleg Y. Gnedin, A. Goobar, Paulo Gordo, Renaud Goullioud, David L. Hall, N. C. Hambly, D. L. Harrison, D. Hobbs, Andrew D. Holland, E. Høg, C. Jordi, S. A. Klioner, A. Lançon, J. Laskar, M. G. Lattanzi, C. Le Poncin-Lafitte, X. Luri, Daniel Michalik, A. Moitinho, A. Mourão, Leonidas A. Moustakas, Neil J. Murray, Matthew W. Muterspaugh, Micaela Oertel, L. Ostorero, J. Portell, Jean-Pierre Prost, A. Quirrenbach, Jean Schneider, Pat Scott, A. Siebert, A. Da Silva, Manuel Silva, P. Thébault, John Tomsick, Wesley A. Traub, Miguel de Val-Borro, Monica Valluri, N. A. Walton, Laura L. Watkins, G. J. White, Ł. Wyrzykowski, Rosemary F. Ġ. Wyse, Y. Yamada   +85 more
openalex   +3 more sources

Micro-Arcsecond Radio Astrometry [PDF]

Annual Review of Astronomy and Astrophysics, 2013
Astrometry provides the foundation for astrophysics. Accurate positions are required for the association of sources detected at different times or wavelengths, and distances are essential to estimate the size, luminosity, mass, and ages of most objects ...
Honma, M., Reid, M. J.
core   +2 more sources

Stingray Sensor System for Persistent Survey of the GEO Belt [PDF]

Sensors
The Stingray sensor system is a 15-camera optical array dedicated to the nightly astrometric and photometric survey of the geosynchronous Earth orbit (GEO) belt visible above Tucson, Arizona.
Tanner Campbell, Adam Battle, Dan Gray, Om Chabra, Scott Tucker, Vishnu Reddy, Roberto Furfaro   +6 more
doaj   +2 more sources

Halometry from astrometry [PDF]

Journal of Cosmology and Astroparticle Physics, 2018
Halometry---mapping out the spectrum, location, and kinematics of nonluminous structures inside the Galactic halo---can be realized via variable weak gravitational lensing of the apparent motions of stars and other luminous background sources. Modern astrometric surveys provide unprecedented positional precision along with a leap in the number of ...
Van Tilburg, Ken, Taki, Anna-Maria, Weiner, Neal   +2 more
openaire   +4 more sources

LISA Galactic Binaries with Astrometry from Gaia DR3 [PDF]

Astrophysical Journal, 2023
Galactic compact binaries with orbital periods shorter than a few hours emit detectable gravitational waves (GWs) at low frequencies. Their GW signals can be detected with the future Laser Interferometer Space Antenna (LISA).
T. Kupfer, V. Korol, T. Littenberg, Sweta Shah, E. Savalle, P. Groot, T. Marsh, M. Le Jeune, G. Nelemans, A. Pala, A. Petiteau, G. Ramsay, D. Steeghs, S. Babak   +13 more
semanticscholar   +1 more source

Polarimetry and astrometry of NIR flares as event horizon scale, dynamical probes for the mass of Sgr A* [PDF]

Astronomy & Astrophysics, 2023
We present new astrometric and polarimetric observations of flares from Sgr A* obtained with GRAVITY, the near-infrared interferometer at ESO’s Very Large Telescope Interferometer (VLTI), bringing the total sample of well-covered astrometric flares to ...
R. Abuter, N. Aimar, P. A. Seoane, A. Amorim, M. Bauböck, J. Berger, H. Bonnet, G. Bourdarot, W. Brandner, V. Cardoso, Y. Clénet, R. Davies, P. Zeeuw, J. Dexter, A. Drescher, A. Eckart, F. Eisenhauer, H. Feuchtgruber, G. Finger, N. F. Schreiber, A. Foschi, P. Garcia, 16 F.Gao, Z. Gelles, E. Gendron, R. Genzel, S. Gillessen, M. Hartl, X. Haubois, F. Haussmann, G. Heißel, T. Henning, S. Hippler, M. Horrobin, L. Jochum, L. Jocou, A. Kaufer, P. Kervella, S. Lacour, V. Lapeyrère, J. L. Bouquin, P. Lena, D. Lutz, F. Mang, N. More, T. Ott, T. Paumard, K. Perraut, G. Perrin, O. Pfuhl, S. Rabien, D. Ribeiro, M. Bordoni, S. Scheithauer, J. Shangguan, T. Shimizu, 15 J.Stadler, O. Straub, C. Straubmeier, E. Sturm, L. Tacconi, F. Vincent, S. Fellenberg, F. Widmann, M. Wielgus, E. Wieprecht, E. Wiezorrek, J. Woillez, Colorado Ave   +68 more
semanticscholar   +1 more source

Mass distribution in the Galactic Center based on interferometric astrometry of multiple stellar orbits [PDF]

Astronomy & Astrophysics, 2021
The stars orbiting the compact radio source Sgr A* in the Galactic Centre are precision probes of the gravitational field around the closest massive black hole.
G. C. R. Abuter, N. Aimar, A. Amorim, J. Ball, M. Baubock, J. Berger, H. Bonnet, G. Bourdarot, W. Brandner, V. Cardoso, Y. Cl'enet, Y. Dallilar, R. Davies, P. Zeeuw, J. Dexter, A. Drescher, F. Eisenhauer, N. F. Schreiber, A. Foschi, P. Garcia, F. Gao, E. Gendron, R. Genzel, S. Gillessen, M. Habibi, X. Haubois, G. Heißel, T. Henning, S. Hippler, M. Horrobin, L. Jochum, L. Jocou, A. Kaufer, P. Kervella, S. Lacour, V. Lapeyrère, J. L. Bouquin, P. L'ena, D. Lutz, T. Ott, T. Paumard, K. Perraut, G. Perrin, O. Pfuhl, S. Rabien, J. Shangguan, T. Shimizu, S. Scheithauer, J. Stadler, A. Stephens, O. Straub, C. Straubmeier, E. Sturm, L. Tacconi, K. Tristram, F. Vincent, S. Fellenberg, F. Widmann, E. Wieprecht, E. Wiezorrek, J. Woillez, Ş. Yazici, A. Young, G. Zins   +63 more
semanticscholar   +1 more source

High-precision Astrometry and Photometry with the JWST/MIRI Imager [PDF]

Publications of the Astronomical Society of the Pacific, 2023
Astrometry is one of the main pillars of astronomy, and one of its oldest branches. Over the years, an increasing number of astrometric works by means of Hubble Space Telescope (HST) data have revolutionized our understanding of various phenomena.
M. Libralato, I. Argyriou, D. Dicken, Macarena García Marín, P. Guillard, D. Hines, P. Kavanagh, S. Kendrew, David R. Law, A. Noriega-Crespo, J. Álvarez-Márquez   +10 more
semanticscholar   +1 more source

Dissecting the stochastic gravitational wave background with astrometry [PDF]

Journal of Cosmology and Astroparticle Physics, 2023
Astrometry, the precise measurement of star motions, offers an alternative avenue to investigate low-frequency gravitational waves through the spatial deflection of photons, complementing pulsar timing arrays reliant on timing residuals.
Mesut Çalışkan, Yifan Chen, Liang Dai, Neha Anil Kumar, Isak Stomberg, Xiao Xue   +5 more
semanticscholar   +1 more source

Astrometry and Photometry for ≈1000 L, T, and Y Dwarfs from the UKIRT Hemisphere Survey [PDF]

Astronomical Journal, 2023
We present the positions, proper motions, and near-infrared photometry for 966 known objects with spectral types later than M that were observed as part of the the UKIRT Hemisphere Survey (UHS).
A. Schneider, J. Munn, F. Vrba, J. Bruursema, S. Dahm, S. Williams, Michael C. Liu, B. Dorland   +7 more
semanticscholar   +1 more source