Search Publications
Missions
Journals
Publication Years
Properties of the Interstellar Medium along Sight Lines to Nearby Planet-hosting Stars
Redfield, Seth; Wood, Brian E.; Linsky, Jeffrey L. +2 more
We analyze the high-resolution ultraviolet spectra of three nearby exoplanet host stars (HD 192310, HD 9826, and HD 206860) to study interstellar properties along their lines of sight and to search for the presence of astrospheric absorption. Using the Hubble Space Telescope/Space Telescope Imaging Spectrograph spectra of the Lyα, Mg II, and Fe II…
Herschel-ATLAS : the spatial clustering of low- and high-redshift submillimetre galaxies
Andreani, P.; van Kampen, E.; Wang, L. +12 more
We present measurements of the angular correlation function of sub-millimetre (sub-mm) galaxies (SMGs) identified in four out of the five fields of the Herschel Astrophysical Terahertz Large Area Survey (H-ATLAS) - GAMA-9h, GAMA-12h, GAMA-15h, and NGP - with flux densities S_{250 µ m} > 30 mJy at 250 µm. We show that galaxies select…
Radio Occultation Observations of the Solar Corona Over 1.60-1.86 R⊙: Faraday Rotation and Frequency Shift Analysis
Lionello, Roberto; Hollweg, Joseph V.; Jensen, Elizabeth A. +5 more
The study of coronal energy transport, central to the solar wind acceleration problem, relies upon accurate representation of magnetic fields and plasma electron densities. This information is difficult to obtain in middle-to-lower coronal regions that may contain complex magnetic structures. Faraday rotation (FR) solar radio occultation observati…
Two new R CMa-type eclipsing binaries containing a possible low-mass Helium white dwarf precursor: KIC 7368103 and KIC 8823397
Zhang, Xiaobin; Luo, Yangping; Wang, Kun +1 more
We report the discovery of two new R CMa-type eclipsing binaries, each consisting of a possible low-mass Helium white dwarf precursor. Based on the Kepler long-cadence photometry and the radial-velocity measurements given by Matson et al., we determined comprehensive photometric solutions and physical parameters of two binaries KIC 7368103 and KIC…
Spectral analysis of the hybrid PG 1159-type central stars of the planetary nebulae Abell 43 and NGC 7094
Rauch, T.; Werner, K.; Kruk, J. W. +5 more
Stellar post asymptotic giant branch (post-AGB) evolution can be completely altered by a final thermal pulse (FTP) which may occur when the star is still leaving the AGB (AFTP), at the departure from the AGB at still constant luminosity (late TP, LTP) or after the entry to the white-dwarf cooling sequence (very late TP, VLTP). Then convection mixe…
RCW 120: a possible case of hit and run, elucidated by multitemperature dust mapping
Marsh, K. A.; Whitworth, A. P.
We present resolution-enhanced images of warm dust at multiple temperatures and opacity index values in the star-forming bubble/H II region, RCW 120. The image set, representing a four-dimensional hypercube of differential column density, was obtained using our Bayesian procedure, PPMAP. The cool peripheral material (∼16-22 K) exhibits ragged clum…
The Fe Line Flux Ratio as a Diagnostic of the Maximum Temperature and the White Dwarf Mass of Cataclysmic Variables
Xu, Xiao-jie; Yu, Zhuo-li; Li, Xiang-dong
The flux ratio of Fe XXVI-Lyα to Fe XXV-Heα lines (I 7.0/I 6.7) is a sensitive indicator of the maximum temperature (T max), and therefore the mass of white dwarf stars (M WD) in cataclysmic variables (CVs). To examine and calibrate the theoretical I 7.0/I 6.7-T max-M
A Versatile and Accurate Method for Halo Mass Determination from Phase-space Distribution of Satellite Galaxies
Wang, Wenting; Han, Jiaxin; Li, Zhao-Zhou +2 more
We propose a versatile and accurate method to estimate the halo mass and concentration from the kinematics of satellite galaxies. We construct the 6D phase-space distribution function of satellites from a cosmological simulation based on the similarity of internal dynamics for different halos. Within the Bayesian statistical framework, not only ca…
Improved Fourier modeling of gravity fields caused by polyhedral bodies: with applications to asteroid Bennu and comet 67P/Churyumov-Gerasimenko
Wu, Leyuan; Chen, Longwei; Wu, Bin +2 more
This paper presents an improved algorithm for the 2D and 3D Fourier forward modeling of gravity fields caused by polyhedral bodies with constant and exponential density distributions. Three modifications have been made to the Fourier forward algorithm introduced in a previous paper. First, vertex-based Fourier-domain expressions are used instead o…
MUSE unravels the ionisation and origin of metal-enriched absorbers in the gas halo of a z = 2.92 radio galaxy
Humphrey, A.; Villar-Martín, M.; De Breuck, C. +9 more
We have used the Multi-Unit Spectroscopic Explorer (MUSE) to study the circumgalactic medium (CGM) of a z = 2.92 radio galaxy, MRC 0943-242 by parametrising its emitting and absorbing gas. In both Lyα λ1216 and He II λ1640 lines, we observe emission with velocity shifts of Δv ≃ -1000 km s-1 from the systemic redshift of the galaxy. Thes…