Search Publications
Swift Ultraviolet Observations of Supernova 2014J in M82: Large Extinction from Interstellar Dust
Wang, Lifan; Krisciunas, Kevin; Siegel, Michael +8 more
We present optical and ultraviolet (UV) photometry and spectra of the very nearby and highly reddened supernova (SN) 2014J in M82 obtained with the Swift Ultra-Violet/Optical Telescope (UVOT). Comparison of the UVOT grism spectra of SN 2014J with Hubble Space Telescope observations of SN2011fe or UVOT grism spectra of SN 2012fr are consistent with…
The 2MIG isolated AGNs - I. General and multiwavelength properties of AGNs and host galaxies in the northern sky
Babyk, Iu.; Sawangwit, U.; Klimanov, S. +2 more
The host isolated galaxies with active galactic nuclei (AGNs) are unique for recognizing their internal multiwavelength properties and physical parameters of accretion on the supermassive black holes outside of the environment. For detaching these effects, we studied the galaxy sample obtained by cross-matching the 2MIG (2MASS isolated galaxy) cat…
Collisional modelling of the AU Microscopii debris disc
Krivov, A. V.; Löhne, T.; Marshall, J. P. +6 more
AU Microscopii's debris disc is one of the most famous and best-studied debris discs and one of only two resolved debris discs around M stars. We perform in-depth collisional modelling of the AU Mic disc including stellar radiative and corpuscular forces (stellar winds), aiming at a comprehensive understanding of the dust production and the dust a…
Simultaneous observation of a hot explosion by NST and IRIS
Yurchyshyn, Vasyl; Lim, Eun-Kyung; Yang, Heesu +9 more
We present the first simultaneous observations of so-called “hot explosions” in the cool atmosphere of the Sun made by the New Solar Telescope (NST) of Big Bear Solar Observatory and the Interface Region Imaging Spectrograph (IRIS) in space. The data were obtained during the joint IRIS-NST observations on 2014 July 30. The explosion of interest st…
Microwave background correlations from dipole anisotropy modulation
Aiola, Simone; Kosowsky, Arthur; Wang, Bingjie +2 more
Full-sky maps of the cosmic microwave background temperature reveal a 7% asymmetry of fluctuation power between two halves of the sky. A common phenomenological model for this asymmetry is an overall dipole modulation of statistically isotropic fluctuations, which produces particular off-diagonal correlations between multipole coefficients. We com…
Polarized galactic synchrotron and dust emission and their correlation
Choi, Steve K.; Page, Lyman A.
We present an analysis of the level of polarized dust and synchrotron emission using the WMAP9 and Planck data. The primary goal of this study is to inform the assessment of foreground contamination in the cosmic microwave background (CMB) measurements below ℓ ~ 200 from 23 to 353 GHz. We compute angular power spectra as a function of sky cut base…
Refining the Associations of the Fermi Large Area Telescope Source Catalogs
Smith, Howard A.; Masetti, N.; Jiménez-Bailón, E. +10 more
The Fermi-Large Area Telescope (LAT) First Source Catalog (1FGL) was released in 2010 February and the Fermi-LAT 2-Year Source Catalog (2FGL) appeared in 2012 April, based on data from 24 months of operation. Since they were released, many follow up observations of unidentified γ-ray sources have been performed and new procedures for associating γ…
The Rosetta Ion and Electron Sensor (IES) measurement of the development of pickup ions from comet 67P/Churyumov-Gerasimenko
Goldstein, R.; Mokashi, P.; Clark, G. +9 more
The Rosetta Ion and Electron Sensor (IES) has been measuring solar wind ions intermittently since exiting from hibernation in May 2014. On 19 August, when Rosetta was ~80 km from the comet 67P/Churyumov-Gerasimenko, which was ~3.5 AU from the Sun, IES began to see ions at its lowest energy range, ~4-10 eV. We identify these as ions created from ne…
Stellar models of multiple populations in globular clusters - I. The main sequence of NGC 6752
Conroy, Charlie; Dotter, Aaron; Milone, A. P. +3 more
We present stellar atmosphere and evolution models of main-sequence stars in two stellar populations of the Galactic globular cluster NGC 6752. These populations represent the two extremes of light-element abundance variations in the cluster. NGC 6752 is a benchmark cluster in the study of multiple stellar populations because of the rich array of …
IRIS and SDO Observations of Recurrent Explosive Events
Gupta, G. R.; Tripathi, Durgesh
Observations of recurrent explosive events (EEs) with timescales of 3-5 minutes are reported. These EEs have been observed with the Interface Region Imaging Spectrograph (IRIS) and have a spatial dimension of ∼ 1\buildrel{\prime\prime}\over{.} 5 along the slit. The spectral line profiles of C ii 1335/1336 Å and Si iv 1394/1403 Å become highly broa…