Results 31 to 40 of about 240,676 (167)

Atmospheric Optical Turbulence Characteristics over the Ocean Relevant to Astronomy and Atmospheric Physics

Applied Sciences, 2021
Due to the space and time constraints of turbulence measurement equipment and the experiment scene, it is difficult to obtain the atmosphere refractive index structure constant over the ocean.
Manman Xu, Shiyong Shao, Ningquan Weng, Liangping Zhou, Qing Liu, Yuefeng Zhao   +5 more
doaj   +1 more source

A planetary companion around the K giant eps Corona Borealis

, 2012
Aims. Our aim is to search for and study the origin of the low-amplitude and long-periodic radial velocity (RV) variations in K giants. Methods. We present high-resolution RV measurements of K2 giant epsilon CrB from February 2005 to January 2012 using ...
B.-C. Lee, Bertelli, D. E. Mkrtichian, da Silva, de Medeiros, Donati, Döllinger, Döllinger, Fischer, Frink, Gettel, Ghezzi, Girardi, Glazunova, Han, Han, Hatzes, Hatzes, Hatzes, Hekker, I. Han, Ida, Johnson, Johnson, Johnson, Johnson, Jørgensen, K.-M. Kim, Kim, Kürster, Lee, Lomb, Lovis, M.-G. Park, Massarotti, Mitchell, Moutou, Niedzielski, Pasquini, Pasquini, Piskunov, Quirrenbach, Reffert, Reiners, Richichi, Saar, Santos, Sato, Sato, Sato, Scargle, Setiawan, Setiawan, Shaya, Sozzetti, Takeda, Tody, Wittenmyer   +57 more
core   +1 more source

The stability of the optical flux variation gradient for 3C120

, 2015
New $B$- and $V$-band monitoring in 2014 $-$ 2015 reveals that the Seyfert 1 Galaxy, 3C120, has brightened by a magnitude of $1.4$, compared to our campaign that took place in 2009 $-$ 2010.
Chini, Rolf, Haas, Martin, Nuñez, Francisco Pozo, Ramolla, Michael, Westhues, Christian   +4 more
core   +1 more source

The Host Galaxy Fluxes of Active Galaxy Nuclei Are Generally Overestimated by the Flux Variation Gradient Method

Universe
In terms of the variable nature of normal active galaxy nuclei (AGN) and luminous quasars, a so-called flux variation gradient (FVG) method has been widely utilized to estimate the underlying non-variable host galaxy fluxes.
Minxuan Cai, Zhen Wan, Zhenyi Cai, Lulu Fan, Junxian Wang   +4 more
doaj   +1 more source

The ISO Galactic Metallicity Gradient Revisited [PDF]

, 2002
Two independent groups (Giveon et al. 2002; Martin-Hernandez et al. 2002) have recently investigated the Galactic metallicity gradient as probed by ISO observations of mid-infrared emission lines from HII regions.
Giveon, Uriel, Morisset, Christophe, Sternberg, Amiel   +2 more
core   +2 more sources

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

Remote 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, Javier Cubas, David Nespral, Santiago Pindado   +3 more
doaj   +1 more source

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

Science 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, Huang, Yang, Liu, Jifeng, Gu, Hongrui, Wu, Hong, Lu, Youjun, Sun, Yongkang, Han, Henggeng, Wang, Song, Beers, Timothy C., Xiao, Kai, Li, Zhirui, Zhang, Boweng, Mao, Yongna, Li, Zhengyang, Ji, Hangxin   +15 more
openaire   +2 more sources

No magnetic field variation with pulsation phase in the roAp star gamma Equulei

, 2004
We present an analysis of 210 high-resolution time-resolved spectropolarimetric observations of the roAp star gamma Equ obtained over three nights in August and September 2003.
Kochukhov, O., Piskunov, N., Ryabchikova, T.   +2 more
core   +1 more source

Discovery of periodic class II methanol masers associated with G339.986-0.425 region [PDF]

, 2015
Ten new class II methanol masers from the 6.7-GHz Methanol Multibeam survey catalogues III and IV were selected for a monitoring programme at both 6.7 and 12.2 GHz with the 26m Hartebeesthoek Radio Astronomy Observatory (HartRAO) radio telescope for two ...
Gaylard, M. J., Goedhart, S., Maswanganye, J. P., van der Walt, D. J.   +3 more
core   +3 more sources

Surveying the state of writing education in physics and astronomy

Physical 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