Search Publications
Calibration of Herschel SPIRE FTS observations at different spectral resolutions
Valtchanov, I.; Hopwood, R.; Spencer, L. +11 more
The SPIRE Fourier Transform Spectrometer on-board the Herschel Space Observatory had two standard spectral resolution modes for science observations: high resolution (HR) and low resolution (LR), which could also be performed in sequence (H+LR). A comparison of the HR and LR resolution spectra taken in this sequential mode revealed a systematic di…
Asymmetric Dark Matter in the shear-dominated universe
Iminniyaz, Hoernisa
We explore the relic abundance of asymmetric Dark Matter in shear-dominated universe in which it is assumed the universe is expanded anisotropically. The modified expansion rate leaves its imprint on the relic density of asymmetric Dark Matter particles if the asymmetric Dark Matter particles are decoupled in shear dominated era. We found the reli…
Identification of candidate millisecond pulsars from Fermi LAT observations II
Wang, Zhong-Xiang; Xing, Yi; Vadakkumthani, Jithesh +1 more
On the basis of the properties of known γ-ray millisecond pulsars (MSPs), we have selected 77 un-associated sources from the Fermi Large Area Telescope (LAT) third source catalog for the purpose of finding likely candidate MSPs. Previously, detailed LAT data analysis for 39 of them was reported, and here we report the analysis for the remaining 38…
A Photometric Study of the Near-Contact Binary XZ Persei
Michaels, E. J.
Presented are two sets of multi-band CCD photometry of the Algol-type binary XZ Persei. Photometric solutions were derived using the Wilson-Devinney program for each dataset. The solution results indicate XZ Per is a semi-detached, near-contact binary whose less-massive secondary star fills its Roche lobe. Asymmetries in the light curves were mode…
Medium-resolution échelle spectroscopy of the Red Square Nebula, MWC 922
Kaper, L.; Bally, J.; Tielens, A. G. G. M. +4 more
Context. Medium-resolution échelle spectra of the Red Square Nebula surrounding the star MWC 922 are presented. The spectra have been obtained in 2010 and 2012 using the X-shooter spectrograph mounted on the Very Large Telescope (VLT) in Paranal, Chile. The spectrum covers a wavelength range between 300 nm-2.5 µm and shows that the nebula is…
Magnetopause Plasma Parameters and Asymmetries in Solar Wind Magnetosphere Coupling
Walsh, B. M.
Constraining the ionized gas evolution with CMB-spectroscopic survey cross-correlation
Ma, Yin-Zhe
We forecast the prospective constraints on the ionized gas model fgas (z) at different evolutionary epochs via the tomographic cross-correlation between kinetic Sunyaev-Zeldovich (kSZ) effect and the reconstructed momentum field at different redshifts. The experiments we consider are the Planck and CMB Stage-4 survey for CMB and the SDS…
Nowcasting and forecasting of the magnetopause and bow shock—A status update
Petrinec, S. M.; Rastaetter, L.; Redmon, R. J.
There has long been interest in knowing the shape and location of the Earth's magnetopause and of the standing fast-mode bow shock upstream of the Earth's magnetosphere. This quest for knowledge spans both the research and operations arenas. Pertinent to the latter, nowcasting and near-term forecasting are important for determining the extent to w…
Study of the early phase of a Coronal Mass Ejection driven shock in EUV images
Susino, Roberto; Frassati, Federica; Mancuso, Salvatore +1 more
The November 1st, 2014 prominence eruption (associated with a C2.7 class flare) resulted in a fast, partial-halo Coronal Mass Ejection (CME). During its early propagation, the CME produced a type II radio burst (seen by the Bruny Island Radio Spectrometer) starting around 04:57 UT when the front entered into the LASCO/C2 field of view (FOV) and th…
TYC 8241 2652 1 and the case of the disappearing disk: No smoking gun yet
Kraus, Stefan; Weigelt, Gerd; Sitko, Michael +12 more
Context. TYC8241 2652 1 is a young star that showed a strong mid-infrared (mid-IR, 8-25 µm) excess in all observations before 2008, which is consistent with a dusty disk. Between 2008 and 2010 the mid-IR luminosity of this system dropped dramatically by at least a factor of 30 suggesting a loss of dust mass of an order of magnitude or more. …