Search Publications
Missions
Journals
Publication Years
Akari Observations of Dusty Tori of Active Galactic Nuclei
Oyabu, Shinki; Kaneda, Hidehiro; Matsuoka, Yoshiki +4 more
Excess Galactic Molecular Absorption Toward the Radio Galaxy 3C 111
Behar, E.; Reynolds, C. S.; Tombesi, F. +1 more
We show the combined spectral analysis of Chandra high-energy transmission grating and XMM-Newton reflection-grating spectrometer observations of the broad-line radio galaxy 3C 111. This source is known to show excess neutral absorption with respect to the one estimated from 21 cm radio surveys of atomic H I in the Galaxy. However, previous works …
Ultraviolet spectroscopy of symbiotic nova V1016 Cyg with IUE and HST
Sanad, M. R.
We present International Ultraviolet Explorer (IUE) & Hubble Space Telescope Space Telescope Imaging Spectrograph (HST STIS) observations of the symbiotic nova V1016 Cyg through the period 1978 - 2000. Four spectra at different times revealing the changes in line fluxes are presented. The outflow velocity of the emitting region was calculated …
X-ray and optical orbital modulation of EXO 0748-676 : A co-variability study using XMM-Newton
Paul, Biswajit; Raman, Gayathri
We present a multi-wavelength timing study of the eclipsing low mass X-ray binary EXO 0748-676 (UY Vol) using XMM-Newton when the source was in a hard spectral state. The orbital optical and X-ray light curves show a fairly large amount of intensity modulation in the 7 observations taken during September-November, 2003, covering 36 complete binary…
New suprathermal proton population around the Moon: Observation by SARA on Chandrayaan-1
Barabash, Stas; Holmström, Mats; Futaana, Yoshifumi +4 more
We report a new population of suprathermal H+ (∼1.5-3 times the solar wind energy) around the Moon observed by Solar Wind Monitor (SWIM)/Sub-keV Atom Reflecting Analyzer (SARA) on Chandrayaan-1. These ions have large initial velocity (>100 km s-1) and are observed on the dayside, near the terminator, and in the near-wake r…
HIP 21539 is not a past very close neighbour of the Sun
Panuzzo, P.; Sartoretti, P.; Soubiran, C. +3 more
Aims: A previous study claimed that the star HIP 21539 passed close to the Sun, at a distance of 1.9 pc, around 0.14 Myr ago. We show that this is not the case.
Methods: We redetermined the trajectory of the star relative to the Sun using a new accurate radial velocity from the HARPS spectrograph combined with the recent Gaia-TGAS astrom…
Social media and popularising space: Philae Lander (@Philae2014) and the journey to comet 67P/Churyumov-Gerasimenko
Ryan, Lorna
The popularisation of space activities is concerned with the public support of, interest in, and understanding of, the benefits to citizens of space science and space exploration. The media, traditional and new, play a significant role in popularising science. While scholars have acknowledged the potential of social media to support public engagem…
Local two-sample testing: a new tool for analysing high-dimensional astronomical data
Freeman, P. E.; Kim, I.; Lee, A. B.
Modern surveys have provided the astronomical community with a flood of high-dimensional data, but analyses of these data often occur after their projection to lower dimensional spaces. In this work, we introduce a local two-sample hypothesis test framework that an analyst may directly apply to data in their native space. In this framework, the an…
Far Infrared and Submillimetre Surveys: from IRAS to Akari, Herschel and Planck
Wang, Lingyu; Rowan-Robinson, Michael
On the signatures of flare-induced global waves in the Sun: GOLF and VIRGO observations
García, Rafael A.; Kumar, Brajesh; Mathur, Savita +1 more
Recently, several efforts have been made to identify the seismic signatures of flares and magnetic activity in the Sun and Sun-like stars. In this work, we have analysed the disc-integrated velocity and intensity observations of the Sun obtained from the Global Oscillations at Low Frequencies (GOLF) and Variability of solar IRradiance and Gravity …