Search Publications
The Jet and Arc Molecular Clouds toward Westerlund 2, RCW 49, and HESS J1023-575 12CO and 13CO (J = 2-1 and J = 1-0) observations with NANTEN2 and Mopra Telescope
Aharonian, F.; Fukui, Y.; Onishi, T. +20 more
We have made new CO observations of two molecular clouds, which we call "jet" and "arc" clouds, toward the stellar cluster Westerlund 2 and the TeV γ-ray source HESS J1023-575. The jet cloud shows a linear structure from the position of Westerlund 2 on the east. In addition, we have found a new counter jet cloud on the west. The arc cloud shows a …
Landscape formation at the Deuteronilus contact in southern Isidis Planitia, Mars: Implications for an Isidis Sea?
Hiesinger, H.; Hauber, E.; Bernhardt, H. +3 more
Two of the most widely studied landforms that are associated with a putative ocean that filled the northern hemisphere of Mars are (1) the Vastitas Borealis Formation (VBF), plain units that cover a larger portion of the northern lowlands of Mars, and (2) a candidate paleoshoreline, e.g., the Deuteronilus contact, which represents the outer margin…
Dust correction factors over 0 < z < 3 in massive star-forming galaxies derived from a stacking analysis of Herschel data
Oteo, I.
We use a stacking analysis in Herschel/PACS to study the accuracy of several dust-correction factors that are typically employed to estimate the total star-formation rate (SFR) of high-redshift, massive, star-forming (SF) galaxies. We also analyze what stacking suggests about the relation between SFR and stellar mass and the redshift evolution of …
Energy and helicity budgets of solar quiet regions
Georgoulis, M. K.; Tziotziou, K.; Tsiropoula, G. +1 more
Aims: We investigate the free magnetic energy and relative magnetic helicity budgets of solar quiet regions.
Methods: Using a novel nonlinear force-free method that requires single solar vector magnetograms we calculated the instantaneous free magnetic energy and relative magnetic helicity budgets in 55 quiet-Sun vector magnetograms.
Clustering GCG: a viable option for unified dark matter-dark energy?
Kumar, Sumit; Sen, Anjan A.
We study the clustering Generalized Chaplygin Gas (GCG) as a possible candidate for dark matter-dark energy unification. The vanishing speed of sound 0cs2 = ) for the GCG fluid can be obtained by incorporating higher derivative operator in the original K-essence Lagrangian. The evolution of the density fluctuations in the GCG…
On the origin of falling-tone chorus elements in Earth's inner magnetosphere
Krasnoselskikh, V.; Le Contel, O.; Angelopoulos, V. +6 more
Generation of extremely/very low frequency (ELF/VLF) chorus waves in Earth's inner magnetosphere has received increased attention recently because of their significance for radiation belt dynamics. Though past theoretical and numerical models have demonstrated how rising-tone chorus elements are produced, falling-tone chorus element generation has…
May 2005 Halo CMEs and Galactic Cosmic Ray Flux Changes at Earth's Orbit
Wawrzynczak, A.; Alania, M. V.; Ahluwalia, H. S. +2 more
The pressure corrected hourly data from the global network of cosmic ray detectors, measurements of the interplanetary magnetic field (IMF) intensity (B) at Earth's orbit and its components Bx, By, Bz (in the geocentric solar ecliptic coordinates) are used to conduct a comprehensive study of the galactic cosmic ray…
Thermal alteration: A possible reason for the inconsistency between OMEGA/CRISM and TES detections of phyllosilicates on Mars?
Glotch, Timothy D.; Che, Congcong
Previous laboratory analyses have shown that high temperatures can modify the crystal structures of some phyllosilicates in such a way that their spectroscopic signatures appear different from various wavelength perspectives. This may be the case in the Nili Fossae region of Mars, where our analyses indicate that thermally altered (~400°C) Fe-rich…
Observed Relationship between CO 2-1 and Dust Emission during the Post-asymptotic-giant-branch Phase
Szczerba, R.; He, J. H.; Schmidt, M. R. +1 more
A CO 2-1 line survey is performed toward a sample of 58 high Galactic latitude post-asymptotic-giant-branch (pAGB) stars. To complement the observations, a compilation of literature CO 2-1 line data of known pAGB stars is done. After combining the data sets, CO 2-1 line data are available for 133 pAGB stars (about 34% of known pAGB stars) among wh…
Variations and correlations in cyclotron resonant scattering features of Vela X-1 studied by INTEGRAL
Wang, Wei
Long-term hard X-ray monitoring observations of high-mass X-ray binary Vela X-1 from 2003-2011 have been carried out by the INTErnational Gamma-Ray Astrophysics Laboratory (INTEGRAL). I systematically analysed the average hard X-ray spectra of Vela X-1 from 3-200 keV, with the main aims of detecting cyclotron resonant scattering features and study…