Search Publications
A Novel Technique to Improve Photometry in Confused Images Using Graphs and Bayesian Priors
Ferguson, Henry C.; Somerville, Rachel S.; Inami, Hanae +2 more
We present a new technique for overcoming confusion noise in deep far-infrared Herschel space telescope images making use of prior information from shorter λ < 2 µm wavelengths. For the deepest images obtained by Herschel, the flux limit due to source confusion is about a factor of three brighter than the flux limit due to instrumental no…
Characteristics of He II Proximity Profiles
Anderson, Scott F.; Schneider, Donald P.; York, Donald G. +4 more
The proximity profile in the spectra of z≈ 3 quasars, where fluxes extend blueward of the He ii Lyα wavelength 304 (1+z) Å, is one of the most important spectral features in the study of the intergalactic medium (IGM). Based on the Hubble Space Telescope spectra of 24 He ii quasars, we find that the majority of them display a proximity profile, co…
HerMES: Current Cosmic Infrared Background Estimates Can Be Explained by Known Galaxies and Their Faint Companions at z < 4
Pérez-Fournon, I.; Valtchanov, I.; Ivison, R. J. +28 more
We report contributions to cosmic infrared background (CIB) intensities originating from known galaxies and their faint companions at submillimeter wavelengths. Using the publicly available UltraVISTA catalog and maps at 250, 350, and 500 µm from the Herschel Multi-tiered Extragalactic Survey, we perform a novel measurement that exploits the…
Photometric Calibration of the Lunar-based Ultraviolet Telescope for Its First Six Months of Operation on the Lunar Surface
Wang, Shen; Wang, Jing; Meng, Xian-Min +10 more
We describe the photometric calibration of the Lunar-based Ultraviolet Telescope (LUT), the first robotic astronomical telescope working on the lunar surface, for its first six months of operation on the lunar surface. Two spectral datasets (set A and B) from near-ultraviolet (NUV) to the optical band were constructed with 44 International Ultravi…
Kinematic and Energetic Properties of the 2012 March 12 Polar Coronal Mass Ejection
Gopalswamy, N.; Yashiro, S.; Akiyama, S.
We report on the energetics of the 2012 March 12 polar coronal mass ejection (CME) originating from a southern latitude of ∼60°. The polar CME is similar to low-latitude (LL) CMEs in almost all respects: three-part morphology; post-eruption arcade (PEA), CME, and filament kinematics; CME mass and kinetic energy; and the relative thermal energy con…
Constraints on the basic parameters of dark matter using the Planck data
Yang, Yupeng
Dark matter (DM) annihilation or decay can affect the anisotropy of the cosmic microwave background (CMB). Therefore, the CMB data can be used to constrain the properties of a dark matter particle. In this work, we use the new CMB data obtained by the Planck satellite to investigate the limits on the basic parameters of a dark matter particle. The…
A 3 Ga old polythermal ice sheet in Isidis Planitia, Mars: Dynamics and thermal regime inferred from numerical modeling
Bourgeois, Olivier; Pochat, Stéphane; Souček, Ondřej +1 more
Isidis Planitia is a 1350 km wide impact crater located close to the martian equator. To test the hypothesis that the 2.8 to 3.4 Ga old Thumbprint Terrain preserved on the floor of this basin is a glacial landform assemblage, we perform a numerical simulation of glaciation with a thermo-mechanically coupled model of ice sheet dynamics. As model in…
The Star Formation Rate and Metallicity of the Host Galaxy of the Dark GRB 080325 at z=1.78
Hashimoto, Tetsuya; Tanaka, Ichi; Ohta, Kouji +5 more
We present near-infrared spectroscopy of the host galaxy of the dark gamma-ray burst (GRB) 080325 using Subaru/Multi-Object Infrared Camera and Spectrograph. The obtained spectrum provides a clear detection of Hα emission and marginal [Nii]λ6584. The host is a massive (M* ∼ 1011 M⊙), dusty ({A}V∼ 1.2) st…
Kinematics of ICMEs/Shocks: Blast Wave Reconstruction Using Type-II Emissions
Aguilar-Rodriguez, E.; Corona-Romero, P.; Gonzalez-Esparza, J. A. +2 more
We present a physical methodology for reconstructing the trajectory of interplanetary shocks using Type-II radio emission data. This technique calculates the shock trajectory assuming that the disturbance propagates as a blast wave in the interplanetary medium. We applied this blast-wave reconstruction (BWR) technique to analyze eight fast Earth-d…
A non-minimally coupled potential for inflation and dark energy after Planck 2015: a comprehensive study
Eshaghi, Mehdi; Zarei, Moslem; Riazi, Nematollah +1 more
In this work we introduce a new plateau-like inflationary model including a quadratic scalar potential coupled non-minimally to gravity. This potential has a dominant constant energy density at early times which can realize successful inflation. It also includes an infinitesimal non-zero term V0 responsible for explaining dark energy wh…