Search Publications
Precision Time-series Photometry in the Thermal Infrared with a “Wall-eyed” Pointing Mode at the Large Binocular Telescope
Skemer, Andrew; Spalding, Eckhart; Hinz, Phil +3 more
Time-series photometry taken from ground-based facilities is improved with the use of comparison stars due to the short timescales of atmospheric-induced variability. However, the sky is bright in the thermal infrared (3-5 µm), and the correspondingly small fields of view of available detectors make it highly unusual to have a calibration st…
A Long-Term Dissipation of the EUV He II (30.4 nm) Segmentation in Full-Disk Solar Images
Didkovsky, Leonid
Some quiet-Sun days observed by the Atmospheric Imaging Assembly (AIA) on-board the Solar Dynamics Observatory (SDO) during the time interval in 2010 - 2017 were used to continue our previous analyses reported by Didkovsky and Gurman (Solar Phys.289, 153, 2014a) and Didkovsky, Wieman, and Korogodina (Solar Phys.292, 32, 2017). The analysis consist…
Revised coordinates of variables in the field of M16-M17
Nesci, R.
The identifications of the variable stars published on IBVS 985 have been checked on the basis of the original finding charts and digitized Asiago plates. Cross check with the 2MASS catalog allowed to get more accurate coordinates. For 19 stars (out of 207) a significant coordinates difference is found and new identifications are given. The interp…
Competition of Short-Range and Long-Range Mechanisms of Spectral Line Broadening in Emission of Atomic and Molecular Gases
Smirnov, B. M.
An analogy is shown for broadening the spectral line of atoms in the case of competition between the short-range Doppler broadening mechanism and the long-range impact mechanism in atomic gases, as well as for the absorption band of a molecular gas in the infrared (IR) region of the spectrum, where the longrange part of the spectrum is also determ…
X-ray-bright optically faint active galactic nuclei in the Subaru Hyper Suprime-Cam wide survey
Greene, Jenny E.; Ueda, Yoshihiro; Terashima, Yuichi +8 more
We construct a sample of X-ray-bright optically faint active galactic nuclei by combining Subaru Hyper Suprime-Cam, XMM-Newton, and infrared source catalogs. Fifty-three X-ray sources satisfying i-band magnitude fainter than 23.5 mag and X-ray counts with the EPIC-PN detector larger than 70 are selected from 9.1 deg2, and their spectral…
The Origin of the Solar Wind
Lee, Kyoung-Sun; Brooks, David H.; Imada, Shinsuke
Vertical temperature profiles in the Venus mesosphere obtained by two retrieval methods from the VIRTIS-VEX observations
Banaszkiewicz, Marek; Piccioni, Giuseppe; Wolkenberg, Paulina
We present vertical temperature profiles derived by two different retrieval methods from nighttime radiation measurements performed by VIRTIS(M)-VEx (Visible and Infrared Thermal Imaging Spectrometer, M channel-Venus Express). The Bayesian approach to the optimal estimation method and the relaxation method are applied in this study. This is a firs…
A search for OB stars in the field of the galactic OB association Bochum 7. II. Proper motion and IR photometry
Orellana, R. B.; Corti, M. A.; Bosch, G. L.
Aims: We plan to identify the members of the Bochum 7 association by performing simultaneous astrometric and spectrophotometric analyses, and estimate its distance and evolutionary stage.
Methods: We used our own visual spectroscopic and UBV photometric data of a 30' × 30' region centered at = 8h44m47.2s,…
V1719 Aql: A solar-type twin binary
Bakış, Volkan; Yücel, Gökhan; Bakış, Hicran
Stellar parameters of the solar type twin binary V1719 Aql have been derived with relatively high accuracy. The erroneous known orbital period was corrected. The true period of the system (P = 4.35 days) is twice the value known in the literature. The system is located at 77 ± 3 pc from the Sun, which matches, within the uncertainty box, the dista…
New Insights into Sunspots Through Hinode Observations
Kubo, Masahito