Search Publications
The GALEX Ultraviolet Virgo Cluster Survey (GUViCS). VIII. Diffuse dust in the Virgo intra-cluster space
Andreani, P.; Bianchi, S.; Boselli, A. +5 more
Aims: We present the first detection of diffuse dust in the intra-cluster medium of the Virgo cluster out to ∼0.4 virial radii, and study the radial variation of its properties on a radial scale of the virial radius.
Methods: Analysing near-UV - i colours for a sample of ∼12 000 background galaxies with redshifts 0.02 < z < 0.8, we…
Methodology and performance of the two-year galactic plane scanning survey of Insight-HXMT
Zhang, Shu; Zhang, Shuang-Nan; Liu, Yuan +7 more
The Galactic plane scanning survey is one of the main scientific objectives of the Hard X-ray Modulation Telescope (known as Insight-HXMT). During the two-year operation of Insight-HXMT, more than 1000 scanning observations have been performed and the whole Galactic plane (0∘ < l <360∘, -10∘ < b <10
The Gaia-ESO Survey: Spectroscopic-asteroseismic analysis of K2 stars in Gaia-ESO. The K2 Galactic Caps Project
Gilmore, G.; Bayo, A.; Lardo, C. +33 more
Context. The extensive stellar spectroscopic datasets that are available for studies in Galactic Archeaology thanks to, for example, the Gaia-ESO Survey, now benefit from having a significant number of targets that overlap with asteroseismology projects such as Kepler, K2, and CoRoT. Combining the measurements from spectroscopy and asteroseismolog…
Cosmological Evolution of Flat-spectrum Radio Quasars Based on the Swift/BAT 105 Month Catalog and Their Contribution to the Cosmic MeV Gamma-Ray Background Radiation
Fukazawa, Yasushi; Inoue, Yoshiyuki; Toda, Koyo
We present a new X-ray luminosity function of flat-spectrum radio quasars (FSRQs) utilizing the latest Swift/BAT 105 month X-ray source catalog. Contrary to previous studies of FSRQs in the X-ray band, using the luminosity-dependent density evolution model we find that FSRQs show evolutionary peaks at z ∼ 1-2 depending on luminosities. Our result …
Late Amazonian Ice Survival in Kasei Valles, Mars
Hepburn, A. J.; Hubbard, B.; Ng, F. S. L. +1 more
High-obliquity excursions on Mars are hypothesized to have redistributed water from the poles to nourish mid-latitude glaciers. Evidence of this process is provided by different types of viscous flow features (ice-rich deposits buried beneath sediment mantle) located there today, including lobate debris aprons (LDAs). During high-obliquity extreme…
A high coverage view of the thermodynamics and metal abundance in the outskirts of the nearby galaxy cluster Abell 2199
Walker, S. A.; Mirakhor, M. S.
We present a joint Suzaku and XMM-Newton analysis of the outskirts of the nearby galaxy cluster Abell 2199, the only nearby galaxy cluster to be observed with near complete azimuthal coverage with Suzaku. Using the XMM-Newton observations to correct for the effects of gas clumping, we find that the azimuthally averaged entropy profile in the outsk…
Identifying Multiple Populations in M71 Using CN
Vesperini, Enrico; Gerber, Jeffrey M.; Friel, Eileen D.
We have observed the CN features at ∼3800 and 4120 Å as well as the CH band at ∼4300 Å for 145 evolved stars in the Galactic globular cluster M71 using the multi-object spectrograph, Hydra, on the Wisconsin-Indiana-Yale-NOAO-3.5 m telescope. We use these measurements to create two δCN indices finding that both distributions are best fit by two pop…
Analogues of interplanetary dust particles to interpret the zodiacal light polarization
Lasue, J.; Levasseur-Regourd, A. C.; Hadamcik, E. +1 more
A Bayesian Approach to the Vertical Structure of the Disk of the Milky Way
Warren, Stephen J.; Dobbie, Phillip S.
This work investigates the vertical profile of the stars in the disk of the Milky Way. The models investigated are of the form $sech^{2/n}(nz/(2H))$ where, setting $\alpha = 2/n$, the three functions of the sequence $\alpha = 0,1,2$ correspond to exponential, $sech$, $sech^2$ functions. We consider symmetric models and asymmetric models, above and…
Structures, Stellar Population Properties, AGN Fractions, and Environments of Massive Compact Galaxies at 1 < z < 2 in 3D-HST/CANDELS
Fang, Guanwen; Gu, Yizhou; Yuan, Qirong +1 more
We present a study on structures and physical properties of massive (M* > 1010M⊙) compact galaxies at 1.0 < z < 2.0 in five 3D-HST/CANDELS fields. Compared with the extended star-forming galaxies (eSFGs), compact star-forming galaxies (cSFGs) are found to have the lower level of star formation, and mainly …