Results 91 to 100 of about 256 (175)

Precise Mass, Orbital Motion, and Stellar Properties of the M-dwarf Binary LP 349−25AB

The Astrophysical Journal
LP 349−25 is a well-studied close stellar binary system comprised of two late M dwarf stars, where both stars are close to the limit between star and brown dwarf. This system was previously identified as a source of gigahertz radio emission.
Salvador Curiel, Gisela N. Ortiz-León, Amy J. Mioduszewski, Anthony B. Arenas-Martinez   +3 more
doaj   +1 more source

86th Annual Meeting of the Meteoritical Society (2024)

Meteoritics &Planetary Science, Volume 59, Issue S1, Page A1-A468, August 2024.
wiley   +1 more source

Astrometry with the 5-km Radio Telescope [PDF]

Monthly Notices of the Royal Astronomical Society, 1973
M. Ryle, B. Elsmore
openaire   +1 more source

VLBI astrometry of radio stars to link radio and optical celestial reference frames – II. 11 radio stars

Monthly Notices of the Royal Astronomical Society
ABSTRACT The alignment between the radio-based International Celestial Reference Frame (ICRF) and the optical Gaia Celestial Reference Frame (Gaia–CRF) is critical for multi-waveband astronomy, yet systematic offsets at the optical bright end ($G \lesssim 13$) limit their consistency.
Jingdong Zhang, Bo Zhang, Shuangjing Xu, Xiaofeng Mai, Mark J Reid, Pengfei Jiang, Wen Chen, Fengchun Shu, Jinling Li, Lang Cui, Xingwu Zheng, Yan Sun, Zhaoxiang Qi   +12 more
openaire   +2 more sources

Exploring nine simultaneously occurring transients on April 12th 1950. [PDF]

Sci Rep, 2021
Villarroel B, Marcy GW, Geier S, Streblyanska A, Solano E, Andruk VN, Shultz ME, Gupta AC, Mattsson L.   +8 more
europepmc   +1 more source

Main-oval Auroral Emission from a T6 Brown Dwarf: Observations, Modeling, and Astrometry

The Astrophysical Journal
From a series of 5 GHz Very Long Baseline Array (VLBA) radio observations taken over a 1 yr span, we present the detection of compact, highly polarized radio emission from the T6 brown dwarf WISE J112254.72+255022.2, compatible with electron cyclotron ...
J. C. Guirado, J. B. Climent, J. D. Bergasa, M. A. Pérez-Torres, J. M. Marcaide, L. Peña-Moñino   +5 more
doaj   +1 more source

The high optical brightness of the BlueWalker 3 satellite. [PDF]

Nature, 2023
Nandakumar S, Eggl S, Tregloan-Reed J, Adam C, Anderson-Baldwin J, Bannister MT, Battle A, Benkhaldoun Z, Campbell T, Colque JP, Damke G, Plauchu Frayn I, Ghachoui M, Guillen PF, Kaeouach AE, Krantz HR, Langbroek M, Rattenbury N, Reddy V, Ridden-Harper R, Young B, Unda-Sanzana E, Watson AM, Walker CE, Barentine JC, Benvenuti P, Di Vruno F, Peel MW, Rawls ML, Bassa C, Flores-Quintana C, García P, Kim S, Longa-Peña P, Ortiz E, Otarola Á, Romero-Colmenares M, Sanhueza P, Siringo G, Soto M.   +39 more
europepmc   +1 more source

The Celestial Reference Frame at K Band: The CRF-K-2025 Catalog

The Astronomical Journal
We present an updated K -band (24 GHz) celestial reference frame (CRF) constructed from ∼3.5 million very long baseline interferometry (VLBI) observations collected during 211 observing epochs between 2002 May and 2025 December using the Very Long ...
David Gordon, Aletha de Witt, Christopher S. Jacobs, Hana Krásná, Alessandra Bertarini, Jamie McCallum, Jonathan Quick, Cristina García-Miró, Taehyun Jung, Jeffrey A. Hodgson, Whee Yeon Cheong, Sang-Sung Lee, Do-Young Byun   +12 more
doaj   +1 more source

The Celestial Frame and the Weighting of the Celestial Pole Offsets in the Computation of VLBI-Based Corrections for the Main Lunisolar Nutation Terms. [PDF]

Sensors (Basel), 2021
Puente V, Folgueira M.
europepmc   +1 more source

Probing a southern hemisphere VLBI Intensive baseline configuration for UT1 determination. [PDF]

Earth Planets Space, 2022
Böhm S, Böhm J, Gruber J, Kern L, McCallum J, McCallum L, McCarthy T, Quick J, Schartner M.   +8 more
europepmc   +1 more source