Results 121 to 130 of about 2,928 (225)

Cooler than Gaia: Parallaxes of Ultracool Objects with WISE

, 2018
This project uses the multi-epoch astrometry from the Wide-field Infrared Survey Explorer (WISE) to demonstrate a method to measure proper motions and trigonometric parallaxes with precisions of ~4 mas yr-1 and ~7 mas, respectively, for low-mass stars ...
Christopher Theissen, Christopher Theissen (5542247)   +1 more
core   +1 more source

Zero-point and external errors of HIPPARCOS parallaxes

, 1995
International audienceA good knowledge of both accuracy and precision of the Hipparcos parallaxes is one of the keys for their future scientific use. For this purpose, the Hipparcos preliminary parallaxes, as obtained after the processing of the first 30
Gomez, A. E., Froeschle, M., Wielen, R., Arenou, Frédéric, Perryman, M. A. C., Lindegren, L., Turon, C.   +6 more
core  

A SURVEY FOR NEW STARS AND BROWN DWARFS IN THE OPHIUCHUS STAR-FORMING COMPLEX. [PDF]

Astron J, 2020
Esplin TL, Luhman KL.
europepmc   +1 more source

Revising the Milky Way Cepheid Calibration: Quantifying and Correcting for Previously Undetected Distance Modulus Errors in the Gaia-based Multiwavelength Period–Luminosity Relations

The Astrophysical Journal
We examine the multiwavelength period–luminosity–color (PLC) relations for Cepheid variables in the Large and Small Magellanic Clouds and the Milky Way.
Barry F. Madore, Wendy L. Freedman
doaj   +1 more source

REFINING THE CENSUS OF THE UPPER SCORPIUS ASSOCIATION WITH <i>GAIA</i>. [PDF]

Astron J, 2020
Luhman KL, Esplin TL.
europepmc   +1 more source

A time-resolved picture of our Milky Way's early formation history. [PDF]

Nature, 2022
Xiang M, Rix HW.
europepmc   +1 more source

The solar neighborhood. XVI. parallaxes from ctiopi: final results from the 1.5 m telescope program [PDF]

, 2006
Trigonometric parallaxes, proper motions and VJ (RI )KC photometry are given for 25 stars (of which one is a zeroparallax control field) targeted by the Cerro Tololo Inter-American Observatory Parallax Investigation (CTIOPI), a widely scoped program ...
Costa Hechenleitner, Edgardo, Méndez Bussard, René Alejandro, Subasavage, John P., Jao, J. C., Ianna, Philip A., Costa, Edgardo, Henry, Todd J.   +6 more
core  

Spitzer + Hubble Space Telescope Parallaxes of 13 Late T and Y Dwarfs

The Astronomical Journal
We present astrometric measurements for 13 cold brown dwarfs in the solar neighborhood ( d  
Federico Marocco, J. Davy Kirkpatrick, Richard L. Smart, Adam C. Schneider, Dan Caselden, Edgardo Costa, Michael C. Cushing, Maximiliano Dirk, Peter R. M. Eisenhardt, Jacqueline K. Faherty, Christopher R. Gelino, Marc J. Kuchner, Aaron M. Meisner, Rene A. Mendez, Robert A. Stiller, Edward L. Wright   +15 more
doaj   +1 more source

Parallaxes for Brown Dwarfs in Clusters

, 2007
Introduction There is a tendency in the wider astronomical community to view astrometrists in general, and those who measure parallaxes in particular, as musty old fuddy-duddies doing valuable and worthy, if dull, work.
By Nney
core  

Observational Properties of β Cephei Stars: 88 New Samples Discovered Based on TESS and Gaia Data

The Astrophysical Journal Supplement Series
We present a systematic investigation of β Cephei (BCEP) stars by integrating photometric data from the Transiting Exoplanet Survey Satellite (TESS) with astrometric parameters from Gaia Data Release 3.
Xiang-dong Shi, Sheng-bang Qian, Li-ying Zhu, Lin-jia Li, Er-gang Zhao, David Mkrtichian, Farkhodjon Khamrakulov, Wen-xu Lin   +7 more
doaj   +1 more source