Search Publications
Shape reconstruction of irregular bodies with multiple complementary data sources
Kaasalainen, M.; Viikinkoski, M.
We discuss inversion methods for shape reconstruction with complementary data sources. The current main sources are photometry, adaptive optics or other images, occultation timings, and interferometry, and the procedure can readily be extended to include range-Doppler radar and thermal infrared data as well. We introduce the octantoid, a generally…
Detailed Sunyaev-Zel'dovich study with AMI of 19 LoCuSS galaxy clusters: masses and temperatures out to the virial radius
AMI Consortium; Olamaie, Malak; Rodríguez-Gonzálvez, Carmen +15 more
We present detailed 16-GHz interferometric observations using the Arcminute Microkelvin Imager (AMI) of 19 clusters with LX > 7 × 1037 W (h50 = 1) selected from the Local Cluster Substructure Survey (LoCuSS; 0.142 ≤ z ≤ 0.295) and of Abell 1758b, which is in the field of view of Abell 1758a. We detect and resolv…
Active Region Moss: Doppler Shifts from Hinode/Extreme-ultraviolet Imaging Spectrometer Observations
Tripathi, Durgesh; Mason, Helen E.; Klimchuk, James A.
Studying the Doppler shifts and the temperature dependence of Doppler shifts in moss regions can help us understand the heating processes in the core of the active regions. In this paper, we have used an active region observation recorded by the Extreme-ultraviolet Imaging Spectrometer (EIS) on board Hinode on 2007 December 12 to measure the Doppl…
Geochemical and mineralogical analysis of Gruithuisen region on Moon using M3 and DIVINER images
Murty, S. V. S.; Kusuma, K. N.; Sebastian, N.
Spectral information from the Moon Mineralogy Mapper (M3) onboard Chandrayaan-1 and DIVINER Lunar Radiometer onboard LRO have been used for geochemical and mineralogical characterisation of the Gruithuisen region on Moon along with morphometrical information from LOLA Digital elevation model. The apparent reflectance of M3 on global mode is used f…
An analysis of thermospheric density response to solar flares during 2001-2006
Le, Huijun; Liu, Libo; Wan, Weixing
Previous studies show there are significant thermospheric responses to the two great solar flares on October 28, 2003 (X17.2) and November 4, 2003 (X28). In the present study, we further explored the thermospheric response to all X-class solar flares during 2001-2006. The observed results show that X5 and stronger solar flares can induce an averag…
Search for ongoing volcanic activity on Venus: Case study of Maat Mons, Sapas Mons and Ozza Mons volcanoes
Roatsch, Th.; Basilevsky, A. T.; Markiewicz, W. J. +3 more
We report on attempts to find the ongoing volcanic activity from near-infrared night-time observations with the Venus Monitoring Camera (VMC) onboard of Venus Express. Here we consider VMC images of the areas of Maat Mons volcano and its vicinities, which, as it follows from analysis of the Magellan data, show evidence of geologically very recent …
First Science Results from SOFIA/FORCAST: The Mid-infrared View of the Compact H II Region W3A
Schoenwald, J.; Zinnecker, H.; Tielens, A. G. G. M. +10 more
The massive star-forming region W3 was observed with the faint object infrared camera for the SOFIA telescope as part of the Short Science program. The 6.4, 6.6, 7.7, 19.7, 24.2, 31.5, and 37.1 µm bandpasses were used to observe the emission of polycyclic aromatic hydrocarbon (PAH) molecules, very small grains, and big grains. Optical depth …
Study of the first productive active region in solar cycle 24
Zhang, J.; Li, L. P.; Li, T. +2 more
Context. The Sun is very quiet with less sunspots and activity since the beginning of solar cycle 24. However, the active region (AR) 11 045 emerged on February 5, 2010, is associated with 43 (8 M- and 35 C-class) flares, 53 coronal mass ejections (CMEs), 29 filament eruptions, 19 extreme ultraviolet (EUV) waves and abundant jets, indicating that …
LEMUR: Large European module for solar Ultraviolet Research. European contribution to JAXA's Solar-C mission
Fineschi, Silvano; Andretta, Vincenzo; Spadaro, Daniele +39 more
The solar outer atmosphere is an extremely dynamic environment characterized by the continuous interplay between the plasma and the magnetic field that generates and permeates it. Such interactions play a fundamental role in hugely diverse astrophysical systems, but occur at scales that cannot be studied outside the solar system. Understanding thi…
Are Large, Cometary-shaped Proplyds Really (Free-floating) Evaporating Gas Globules?
Sahai, R.; Morris, M. R.; Güsten, R.
We report the detection of strong and compact molecular line emission (in the CO J = 3-2, 4-3, 6-5, 7-6, 13CO J = 3-2, HCN, and HCO+ J = 4-3 transitions) from a cometary-shaped object (Carina-frEGG1) in the Carina star-forming region (SFR) previously classified as a photoevaporating protoplanetary disk (proplyd). We derive a …