Search Publications
Improved prediction of accessible surface area results in efficient energy function application
Iqbal, Sumaiya; Mishra, Avdesh; Hoque, Md Tamjidul
An accurate prediction of real value accessible surface area (ASA) from protein sequence alone has wide application in the field of bioinformatics and computational biology. ASA has been helpful in understanding the 3-dimensional structure and function of a protein, acting as high impact feature in secondary structure prediction, disorder predicti…
The infrared and molecular environment surrounding the Wolf-Rayet star WR 130
Noriega-Crespo, A.; Cichowolski, S.; Pineault, S. +3 more
We present a study of the molecular CO gas and mid/far-infrared radiation arising from the environment surrounding the Wolf-Rayet (WR) star 130. We use the multiwavelength data to analyse the properties of the dense gas and dust, and its possible spatial correlation with that of young stellar objects (YSOs). We use 12CO J=1-0 data from …
Improved outer boundary conditions for outer radiation belt data assimilation using THEMIS-SST data and the Salammbo-EnKF code
Daglis, I. A.; Maget, V.; Sicard-Piet, A. +4 more
Over the last decade, efforts have been made in the radiation belt community to develop data assimilation tools in order to improve the accuracy of radiation belts models. In this paper we present a new method to correctly take into account the outer boundary conditions at L* = 8 in such an enhanced model of the radiation belts. To do that we base…
X-ray Emission from Stellar Jets by Collision against High-density Molecular Clouds: an Application to HH 248
Miceli, M.; Orlando, S.; Bonito, R. +6 more
We investigate the plausibility of detecting X-ray emission from a stellar jet that impacts a dense molecular cloud, a scenario that may be typical for classical T Tauri stars with jets in dense star-forming complexes. We first model the impact of a jet against a dense cloud using two-dimensional axisymmetric hydrodynamic simulations, exploring di…
Discovery of blue companions to two southern Cepheids: WW Car and FN Vel
Kovtyukh, V.; Szabados, L.; Chekhonadskikh, F. +2 more
A large number of high-dispersion spectra of classical Cepheids were obtained in the region of the Ca II H+K spectral lines. The analysis of these spectra allowed us to detect the presence of a strong Balmer line, Hɛ, for several Cepheids, interpreted as the signature of a blue companion: the presence of a sufficiently bright blue companion to the…
The Hyperfine Structure of the Rotational Spectrum of HDO and its Extension to the THz Region: Accurate Rest Frequencies and Spectroscopic Parameters Forastrophysical Observations
Puzzarini, Cristina; Lattanzi, Valerio; Cazzoli, Gabriele +2 more
The rotational spectrum of the mono-deuterated isotopologue of water, HD16O, has been investigated in the millimeter- and submillimeter-wave frequency regions, up to 1.6 THz. The Lamb-dip technique has been exploited to obtain sub-Doppler resolution and to resolve the hyperfine (hf) structure due to the deuterium and hydrogen nuclei, th…
Extended, Dusty Star Formation Fueled by a Residual Cooling Flow in the Cluster of Galaxies Sérsic 159-03
Veilleux, S.; McDonald, M.; Werner, N. +1 more
While the cooling of the hot intracluster medium (ICM) in the cores of galaxy clusters is mostly counteracted by heating from the central active galactic nucleus (AGN), the balance is not perfect. This can lead to residual cooling flows and low-level star formation, the physics of which is not well understood. Here we present a detailed study of t…
The Venus-solar wind interaction: Is it purely ionospheric?
Luhmann, J. G.; Wei, H. Y.; Zhang, T. L. +2 more
The Venus solar wind interaction is often regarded as the prototypical example of an induced magnetosphere. Pioneer Venus Orbiter (PVO) observations during a period of moderate to strong solar EUV fluxes led to a fairly detailed picture in which the currents in the conducting ionosphere produce a nearly impenetrable obstacle to the incident magnet…
Absorption of crystalline water ice in the far infrared at different temperatures
Krivov, A. V.; Löhne, T.; Mutschke, H. +2 more
The optical properties of ice in the far infrared are important for models of protoplanetary and debris disks. In this report, we derive a new set of data for the absorption (represented by the imaginary part of the refractive index κ) of crystalline water ice in this spectral range. The study includes a detailed inspection of the temperature depe…
Atmospheric Response of an Active Region to New Small Flux Emergence
Harra, L.; Green, L.; Shelton, D.
We investigate the atmospheric response to a small emerging flux region (EFR) that occurred in the positive polarity of Active Region 11236 on 23 - 24 June 2011. Data from the Solar Dynamics Observatory's Atmospheric Imaging Assembly (AIA), the Helioseismic and Magnetic Imager (HMI), and Hinode's EUV imaging spectrometer (EIS) are used to determin…