Search Publications
Water production rate of comet C/1997 H2 (SOHO) near perihelion
Mancuso, Salvatore
Comet C/1997 H2 is a non-Kreutz comet that was observed near perihelion at 0.137 AU on 1997 May 2 with the Ultraviolet Coronagraph Spectrometer (UVCS) aboard the Solar and Heliospheric Observatory (SOHO) satellite. The observed H i Lyman α radiance profile at 1215.67 Å, which was obtained during the crossing of the cometary coma through the UVCS s…
The Three-dimensional Orbit and Physical Parameters of 47 Oph
Wang, Xiaoli; Ren, Shulin; Fu, Yanning +1 more
Although 47 Oph has been shown to be a binary with a period of ∼27 days using both spectroscopic and interferometric techniques, only a preliminary orbit has been obtained in the previous work due to the shortage of high precision measurements. Since 1997, new spectroscopic and interferometric measurements have been obtained with much higher preci…
Unbiased Correction Relations for Galaxy Cluster Properties Derived from Chandra and XMM-Newton
Zhao, Hai-Hui; Jia, Shu-Mei; Chen, Yong +2 more
We use a sample of 62 clusters of galaxies to investigate the discrepancies between the gas temperature and total mass within r 500 from XMM-Newton and Chandra data. Comparisons of the properties show that (1) both the de-projected and projected temperatures determined by Chandra are higher than those of XMM-Newton and there is a good l…
Hydraulic modeling of the tributary and the outlet of a Martian paleolake located in the Memnonia quadrangle
Pajola, M.; Baratti, E.; Rossato, S. +4 more
We present a steady state hydraulic model of the tributary and the outlet of a Martian paleolake located in the Memnonia quadrangle between 167°0'0''W and 167°30'0''W longitude and between 9°25'0''S and 9°45'0''S latitude. The Mars Express High-resolution stereo camera (HRSC) digital elevation model, H31850000DA4, with a spatial resolution of 75 m…
Principal component analysis of the reionization history from Planck 2015 data
Cai, Rong-Gen; Guo, Zong-Kuan; Dai, Wei-Ming
The simple assumption of an instantaneous reionization of the Universe may bias estimates of cosmological parameters. In this paper a model-independent principal component method for the reionization history is applied to give constraints on the cosmological parameters from recent Planck 2015 data. We find that the Universe is not completely reion…
Searching for Overionized Plasma in the Gamma-ray-emitting Supernova Remnant G349.7+0.2
Ercan, E. N.; Majumdar, P.; Saha, L. +3 more
G349.7+0.2 is a supernova remnant (SNR) expanding in a dense medium of molecular clouds and interacting with clumps of molecular material emitting gamma-rays. We analyzed the gamma-ray data of the Large Area Telescope on board the Fermi Gamma-Ray Space Telescope and detected G349.7+0.2 in the energy range of 0.2-300 GeV with a significance of ∼13σ…
Updated reduced CMB data and constraints on cosmological parameters
Cai, Rong-Gen; Guo, Zong-Kuan; Tang, Bo
We obtain the reduced CMB data {lA, R, z∗} from WMAP9, WMAP9+BKP, Planck+WP and Planck+WP+BKP for the ΛCDM and wCDM models with or without spatial curvature. We then use these reduced CMB data in combination with low-redshift observations to put constraints on cosmological parameters. We find that including BKP results in a h…
Identification of coronal sources of the solar wind from solar images in the EUV spectral range
Slemzin, V. A.; Shugai, Yu. S.
Methods of localizing coronal sources of the solar wind (SW), such as coronal holes, quasi-stationary fluxes from active regions, and transient sources associated with small-scale active phenomena are considered based on vacuum-ultraviolet (EUV) images of the corona at low solar activity during the initial period of the 24th solar cycle (2010). It…
Exploiting cross correlations and joint analyses
Doré, O.; Honscheid, K.; Linder, E. +13 more
The nature of the dark energy thought to be causing the accelerating expansion of the Universe is one of the most compelling questions in all of science. Any of the explanations for the accelerated expansion, whether a new field, a negative pressure fluid, or a modification to General Relativity will signal new physics and have a profound effect o…
A hot bubble at the centre of M 81
Ricci, T. V.; Steiner, J. E.; Giansante, L.
Context. Messier 81 has the nearest active nucleus with broad Hα emission. A detailed study of this galaxy's centre is important for understanding the innermost structure of the AGN phenomenon.
Aims: Our goal is to seek previously undetected structures using additional techniques to reanalyse a data cube obtained with the GMOS-IFU installed o…