Results 41 to 50 of about 6,767,247 (161)

Painting a portrait of the Galactic disc with its stellar clusters [PDF]

open access: yesAstronomy & Astrophysics, 2020
Context.The large astrometric and photometric survey performed by theGaiamission allows for a panoptic view of the Galactic disc and its stellar cluster population.
T. Cantat-Gaudin   +12 more
semanticscholar   +1 more source

Astronomy & Astrophysics (CAUCASUS)-VOLUME 3

open access: yes, 2020
The III volume of Journal “Astronomy & Astrophysics (Caucasus)” was dedicated to the 110th Anniversary of Academician Eugene Kharadze. Academician Evgene Kharadze Vice - President of International Union of Astronomy (1976-82) I would like to give you
(Caucasus)”, Astronomy & Astrophysics
core   +1 more source

Period Change of the Contact Binary AH Tauri [PDF]

open access: yesJournal of Astronomy and Space Sciences, 2004
New BVRI photometric observations of the contact binary AH Tau were performed with the 61 cm reflector and a 2K CCD camera at the Sobaeksan Optical Astronomy Observatory during seven nights from September to December, 2001. A total of 144 times of minima
Dongjoo Lee   +5 more
doaj   +1 more source

“Frog-eyes” in astronomy: Monitoring binary radial velocity variations through a pair of narrow-band filters

open access: yesScience China Physics, Mechanics & Astronomy
Spectroscopic observations are a crucial step in driving major discoveries in the era of time-domain surveys. However, the pace of current spectroscopic surveys is increasingly unable to meet the demands of rapidly advancing large-scale time-domain surveys.
Zheng, Chuanjie   +15 more
openaire   +2 more sources

The Illusory Precision of Transit Timing Variation Masses: Hidden Solutions Behind Kepler-9’s Tight Mass Ratio

open access: yesThe Astrophysical Journal
Transit timing variations (TTVs) are considered a tool for constraining the masses of transiting planets in the absence of radial velocity data. Although theoretical studies have long revealed that TTV mass determinations intrinsically suffer from ...
Sheng Jin   +3 more
doaj   +1 more source

New Astronomical Observatory Design for the Detection and Tracking of Satellite Objects: The Satellite Robotic Observatory (SRO)

open access: yesRemote Sensing
Robotic Astronomical Observatories (RAOs) have provided very good results in different research projects in astrophysics/astronomy. Their applications in the detection, tracking, and identification of near-Earth objects have contributed to the ...
Francisco Espartero   +3 more
doaj   +1 more source

PERIODIC AND SPORADIC VARIATIONS IN THE SPECTRAL FLUX DENSITY OF THE CAS A SUPERNOVA REMNANT [PDF]

open access: yesRadio Physics and Radio Astronomy, 2020
Purpose: Based on the long-term study data in all radio spectrum ranges, the nature of deviations of spectral flux density of the Cas A supernova remnant from the tendency of its secular decrease is considered.
A. A. Gorbunov   +3 more
doaj   +1 more source

Surveying the state of writing education in physics and astronomy

open access: yesPhysical Review Physics Education Research
Writing is a critical skill for modern science, enabling collaboration, scientific discourse, public outreach, and more. Accordingly, it is important to consider how physicists and astronomers are trained to write.
Briley L. Lewis
doaj   +1 more source

Spatial Variation of the Chemical Properties of Massive Star-forming Clumps [PDF]

open access: yesAstrophysical Journal Supplement Series, 2019
We selected 90 massive star-forming clumps with strong N2H+(1−0), HCO+(1−0), HCN(1−0), and HNC(1−0) emission from the Millimetre Astronomy Legacy Team 90 GHz survey. We obtained Herschel data for all 90 sources and NRAO VLA Sky Survey data for 51 of them.
Ming-Yu Li   +6 more
semanticscholar   +1 more source

Astronomy & Astrophysics (CAUCASUS)-VOLUME 4

open access: yes, 2018
The IV volume of Journal “Astronomy & Astrophysics (Caucasus)” was dedicated to the 110th Anniversary of Academician Victor Hambardzumyan. AcademicianVictor Hambardzumyan President of International Union of Astronomy (in 1961 – 1964 and 1966 – 72 ...
(CAUCASUS), Astronomy & Astrophysics
core   +1 more source

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