Search Publications
Ultraviolet spectroscopic study of EU UMa and ST LMi from HST and IUE observations
Sanad, M. R.; Bobrowsky, M.
We present the first orbit-resolved ultraviolet spectroscopic observations of the two polar systems EU UMa and ST LMi obtained with the Hubble Space Telescope Faint Object Spectrograph (HST FOS) and International Ultraviolet Explorer (IUE) during their intermediate- and low-luminosity states in the period between 1982 and 2003. Different line prof…
Development of a new Phobos atlas based on Mars Express image data
Oberst, J.; Zubarev, A.; Nadezhdina, I. +6 more
A new Phobos Atlas has been prepared, which includes a variety of thematic maps at various projections and scales, emphasizing dynamic topography, surface multispectral properties, geomorphology, as well as grooves- and crater statistics. The atlas benefits from innovative mapping techniques and recent results from Mars Express image processing: n…
Right-handed circularly polarized dispersive Alfvén wave: Localization and turbulence in solar wind
Sharma, R. P.; Gaur, Nidhi; Sharma, Swati
The elucidation of the turbulent spectrum in the solar wind region in the dispersive range of scales is not yet completely established. The observational analysis of many spacecraft report that the fluctuations on the order of (or smaller scales) proton inertial length λi = c/ω p i show disparity with respect to the large-sca…
Search for ammonia in comet C/2012 S1 (ISON)
Codella, C.; Crovisier, J.; Comoretto, G. +9 more
Comets are uniquely pristine bodies providing unique insights about the formation of our Solar System. In this work, we focus on a dynamically new comet as it enters the inner Solar System for the first time after residing for billion of years in the Oort Cloud. Such comets are particularly important because they are thought to be not differentiat…
Relationship of dayside main layer ionosphere height to local solar time on Mars and implications for solar wind interaction influence
Huang, Qian; Zhang, Jie; Orosei, Roberto +1 more
To understand the influence of solar wind on the daytime main layer ionosphere of Mars, we investigated the local solar time (LST) variations of three characteristic heights of the ionosphere, namely, the heights of the 1 MHz and 1.5 MHz reflection points (i.e., 1.24 × 1010 m-3 and 2.79 × 1010 m-3 isoden…
Rosetta Mission's "7 Hours of Terror" and Philae's Descent
Blanco, Philip
In November 2014 the Rosetta mission to Comet 67P/Churyumov-Gerasimenko made the headlines when its Philae lander completed a successful unpowered descent onto the surface of the comet nucleus after "7 hours of terror" for the mission scientists. 67P's irregular shape and rotation made this task even more challenging. Philae fell almost radially t…
Ionospheric inversion of the Venus Express radio occultation data observed by Shanghai 25 m and New Norcia 35 m antennas
Zhang, Su-Jun; Jian, Nian-Chuan; Li, Jin-Ling +3 more
Electron density profiles of Venus' ionosphere are inverted from the Venus Express (VEX) one-way open-loop radio occultation experiments carried out by the Shanghai 25 m antenna from November 2011 to January 2012 at solar maximum conditions and by the New Norcia 35 m antenna from August 2006 to June 2008 at solar intermediate conditions. The elect…
The PAC2MAN mission: a new tool to understand and predict solar energetic events
Musset, Sophie; Amaya, Jorge; Diercke, Andrea +12 more
An accurate forecast of flare and coronal mass ejection (CME) initiation requires precise measurements of the magnetic energy buildup and release in the active regions of the solar atmosphere. We designed a new space weather mission that performs such measurements using new optical instruments based on the Hanle and Zeeman effects. The mission con…
Water in star-forming regions with Herschel (WISH) (Corrigendum). V. The physical conditions in low-mass protostellar outflows revealed by multi-transition water observations
Liseau, R.; van Dishoeck, E. F.; Bergin, E. A. +17 more
Herschel is an ESA space observatory with science instruments provided by European-led Principal Investigator consortia and with important participation from NASA.
X-ray outbursts from a new transient in NGC 55
Jithesh, V.; Wang, Zhongxiang
We report the outbursts from a newly discovered X-ray transient in the Magellanic-type, SB(s)m galaxy NGC 55. The transient source, XMMU J001446.81-391123.48, was undetectable in the 2001 XMM-Newton and 2004 Chandra observations, but detected in a 2010 XMM-Newton observation at a significance level of 9σ in the 0.3-8 keV energy band. The XMM-Newto…