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The Dust and Gas Content of the Crab Nebula
Barlow, M. J.; Owen, P. J.
We have constructed mocassin photoionization plus dust radiative transfer models for the Crab Nebula core-collapse supernova (CCSN) remnant, using either smooth or clumped mass distributions, in order to determine the chemical composition and masses of the nebular gas and dust. We computed models for several different geometries suggested for the …
Delensing the CMB with the cosmic infrared background
Sherwin, Blake D.; Schmittfull, Marcel
As confusion with lensing B modes begins to limit experiments that search for primordial B-mode polarization, robust methods for delensing the cosmic microwave background (CMB) polarization sky are becoming increasingly important. We investigate in detail the possibility of delensing the CMB with the cosmic infrared background (CIB), emission from…
Photometric properties of comet 67P/Churyumov-Gerasimenko from VIRTIS-M onboard Rosetta
Bellucci, G.; Mottola, S.; Fornasier, S. +17 more
Aims: We investigate the nucleus photometric properties of the comet 67P/Churyumov-Gerasimenko as observed by the Visible and Infrared Thermal Imaging Spectrometer (VIRTIS) onboard the Rosetta spacecraft. Both full-disk and disk-resolved images of the comet have been analyzed, deriving light and phase curves as well as a photometric reduction…
The Stacked Thermal Sunyaev-Zel'dovich Signal of Locally Brightest Galaxies in Planck Full Mission Data: Evidence for Galaxy Feedback?
Battaglia, Nicholas; Spergel, David N.; Hill, J. Colin +1 more
We use the Planck full mission temperature maps to examine the stacked thermal Sunyaev-Zel’dovich (tSZ) signal of 188,042 “locally brightest galaxies” (LBGs) selected from the Sloan Digital Sky Survey Data Release 7. Our LBG sample closely matches that of Planck Collaboration XI (PCXI), but our analysis differs in several ways. We work directly in…
Dependency of Dynamical Ejections of O Stars on the Masses of Very Young Star Clusters
Kroupa, Pavel; Pflamm-Altenburg, Jan; Oh, Seungkyung
Massive stars can be efficiently ejected from their birth star clusters through encounters with other massive stars. We study how the dynamical ejection fraction of O star systems varies with the masses of very young star clusters, {{M}ecl}, by means of direct N-body calculations. We include diverse initial conditions by varying the hal…
CSI 2264: Characterizing Young Stars in NGC 2264 With Short-Duration Periodic Flux Dips in Their Light Curves
Song, Inseok; Gillen, Edward; Cody, Ann Marie +27 more
We identify nine young stellar objects (YSOs) in the NGC 2264 star-forming region with optical CoRoT light curves exhibiting short-duration, shallow periodic flux dips. All of these stars have infrared excesses that are consistent with their having inner disk walls near the Keplerian co-rotation radius. The repeating photometric dips have FWHMs ge…
HerMES: ALMA Imaging of Herschel-selected Dusty Star-forming Galaxies
Pérez-Fournon, I.; Ivison, R. J.; Wang, L. +25 more
The Herschel Multi-tiered Extragalactic Survey (HerMES) has identified large numbers of dusty star-forming galaxies (DSFGs) over a wide range in redshift. A detailed understanding of these DSFGs is hampered by the limited spatial resolution of Herschel. We present 870 µm 0.″45 resolution imaging obtained with the Atacama Large Millimeter/sub…
The powerful jet of an off-nuclear intermediate-mass black hole in the spiral galaxy NGC 2276
Roberts, T. P.; Mezcua, M.; Sutton, A. D. +1 more
Jet ejection by accreting black holes is a mass invariant mechanism unifying stellar and supermassive black holes (SMBHs) that should also apply for intermediate-mass black holes (IMBHs), which are thought to be the seeds from which SMBHs form. We present the detection of an off-nuclear IMBH of ∼5 × 104 M⊙ located in an unusu…
Planck 2013 results. XXXII. The updated Planck catalogue of Sunyaev-Zeldovich sources
Böhringer, H.; Kneissl, R.; Dahle, H. +275 more
We update the all-sky Planck catalogue of 1227 clusters and cluster candidates (PSZ1) published in March 2013, derived from detections of the Sunyaev-Zeldovich (SZ) effect using the first 15.5 months of Planck satellite observations. As an addendum, we deliver an updated version of the PSZ1 catalogue, reporting the further confirmation of 86 Planc…
The Formation and Magnetic Structures of Active-region Filaments Observed by NVST, SDO, and Hinode
Yan, X. L.; Xue, Z. K.; Wang, J. C. +4 more
To better understand the properties of solar active-region filaments, we present a detailed study on the formation and magnetic structures of two active-region filaments in active region NOAA 11884 during a period of four days. It is found that the shearing motion of the opposite magnetic polarities and the rotation of the small sunspots with nega…