Results 81 to 90 of about 10,210 (220)

Optical interferometry and astrometry of exoplanets

, 2022
Urbain Le Verrier, 175 years ago, was able to predict the existence and position of Neptune from the trajectory of Uranus. Could we make similar detections with exoplanets?
Lacour, Sylvestre
core   +1 more source

Revised orbital parameters of the γ2 Velorum system★

Astronomy & Astrophysics
Context.γ2 Velorum is the closest and visually brightest Wolf-Rayet (WR) binary system. Its eccentric orbit modulates the X-rays observed from the wind-wind interaction, and its large separation enables spatial resolution of both components. Aims. We aim
Schmutz Werner, Hummel Christian A., Koenigsberger Gloria, Millour Florentin, Sanchez-Bermudez Joel   +4 more
doaj   +1 more source

Astrometry of Circumstellar Masers [PDF]

, 2003
8 pages, 2 figures, to appear in "Mass-losing Stars and their Circumstellar Matter", eds Y. Nakada & M.
van Langevelde, H. J., Vlemmings, W. H. T.   +1 more
openaire   +2 more sources

High-precision astrometry with VVV [PDF]

Aims. We use near-infrared, ground-based data from the VISTA Variables in the Via Lactea (VVV) survey to indirectly extend the astrometry provided by the Gaia catalog to objects in heavily extinct regions toward the Galactic bulge and plane that are ...
M. Griggio, Anderson, J., D. Minniti, Bellini, A., Minniti, D., Griggio M., M. Libralato, L. R. Bedin, Griggio, M., Libralato M., Anderson J., Smith, L. C., J. Anderson, Smith L.C., Libralato, M., Bellini A., Bedin L.R., Bedin, L. R., A. Bellini, L. C. Smith, Minniti D.   +20 more
core   +1 more source

Modern astrometry in different ranges of electromagnetic waves [PDF]

, 2005
A contribution of various astrometry school beginning from the German school after F. Bessel is described. Besides, the modern astrometry problems and prospects connected with the further increasing of the accuracy and with developing of a single ...
Kharin, A.S.
core   +2 more sources

Nanoradian Ground-Based Astrometry, Optical Navigation, and Artificial Reference Stars

, 2016
Spacecraft carrying optical communication lasers can be treated as artificial stars, whose relative astrometry to Gaia reference stars provides spacecraft positions in the plane-of-sky for optical navigation.
Biswas, Abhijit, Ely, Todd, Martin-Mur, Tomas, Jacobs, Christopher, Rud, Mike, Turyshev, Slava, Shao, Michael, Werne, Thomas, Sandhu, Jagmit, Zhai, Chengxing, Owen, William, Saini, Navtej, Lazio, Joseph   +12 more
core   +2 more sources

A review of 70 years with astrometry [PDF]

In 1953 I heard of an experiment in 1925 by Bengt Str\"omgren where he observed transit times with the meridian circle at the Copenhagen University Observatory measuring the current in a photocell behind slits when a star was crossing.
Høg, Erik
core   +1 more source

Exomoon search with VLTI/GRAVITY around the substellar companion HD 206893 B

Astronomy & Astrophysics
Context. This study presents the first application of high-precision astrometry to search for exomoons around substellar companions, as this field remains largely unexplored. Aims.
Kral Q., Wang J., Kammerer J., Lacour S., Malin M., Winterhalder T., Charnay B., Perrot C., Huet P., Abuter R., Amorim A., Balmer W. O., Benisty M., Berger J.-P., Beust H., Blunt S., Boccaletti A., Bonnefoy M., Bonnet H., Bordoni M. S., Bourdarot G., Brandner W., Cantalloube F., Caselli P., Chauvin G., Chavez A., Chomez A., Choquet E., Christiaens V., Clénet Y., Coudé du Foresto V., Cridland A., Davies R., Dembet R., Dexter J., Drescher A., Duvert G., Eckart A., Eisenhauer F., Förster Schreiber N. M., Garcia P., Garcia Lopez R., Gardner T., Gendron E., Genzel R., Gillessen S., Girard J. H., Grant S., Haubois X., Henning Th., Hinkley S., Hippler S., Houllé M., Hubert Z., Jocou L., Keppler M., Kervella P., Kreidberg L., Kurtovic N. T., Lagrange A.-M., Lapeyrère V., Le Bouquin J.-B., Lutz D., Maire A.-L., Mang F., Marleau G.-D., Mérand A., Mollière P., Monnier J. D., Mordasini C., Mouillet D., Nasedkin E., Nowak M., Ott T., Otten G. P. P. L., Paladini C., Paumard T., Perraut K., Perrin G., Pfuhl O., Pourré N., Pueyo L., Ribeiro D. C., Rickman E., Rustamkulov Z., Shangguan J., Shimizu T., Sing D., Stadler J., Stolker T., Straub O., Straubmeier C., Sturm E., Tacconi L. J., Vigan A., Vincent F., von Fellenberg S. D., Widmann F., Woillez J., Yazici S., Abd El Dayem K., Aimar N., Berdeu A., Correia C., Defrère D., Fabricius M., Feuchtgruber H., Foschi A., Hönig S. F., Joharle S., Laugier R., Lai O., Leftley J., Lopez B., Millour F., Montargès M., Morujão N., Nowacki H., Osorno J., Petrov R., Petrucci P. O., Rabien S., Robbe-Dubois S., Sadun Bordoni M., Sánchez Bermúdez J., Santos D., Sauter J., Scigliuto J., Soulez F., Subroweit M., Sykes C.   +130 more
doaj   +1 more source

ELSA and the Frontiers of Astrometry [PDF]

EAS Publications Series, 2010
ELSA stands for the ambitious goal of `European Leadership in Space Astrometry'. In this closing contribution I will examine how the ELSA network has advanced this goal. I also look ahead to the time when the Gaia data will be published and consider what needs to be done to maintain European leadership.
openaire   +2 more sources

Using Astrometry to Break Degeneracies in Stellar Surface Mapping

The Astrophysical Journal
Astrometric jitter noise arises when starspots on a rotating stellar surface move in and out of view, shifting the photocenter. This noise may limit our ability to detect and weigh small, sub-Neptune-sized planets around active stars.
Jamila S. Taaki, Lia Corrales, Alfred O. Hero III   +2 more
doaj   +1 more source