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Discovery of Molecular Hydrogen in SN 1987A
Fransson, Claes; Leibundgut, Bruno; Spyromilio, Jason +3 more
Both CO and SiO have been observed at early and late phases in SN 1987A. H2 was predicted to form at roughly the same time as these molecules, but was not detected at early epochs. Here, we report the detection of NIR lines from H2 at 2.12 and 2.40 µ {{m}} in VLT/SINFONI spectra obtained between days 6489 and 10,120. Th…
The variable spin-down rate of the transient magnetar XTE J1810-197
Pintore, Fabio; Mereghetti, Sandro; Esposito, Paolo +7 more
We have analysed XMM-Newton and Chandra observations of the transient magnetar XTE J1810-197 spanning more than 11 yr, from the initial phases of the 2003 outburst to the current quiescent level. We investigated the evolution of the pulsar spin period and we found evidence for two distinct regimes: during the outburst decay, dot{ν } was highly var…
The CDF Archive: Herschel PACS and SPIRE Spectroscopic Data Pipeline and Products for Protostars and Young Stellar Objects
Larson, Rebecca L.; Lee, Jeong-Eun; Bouwman, Jeroen +6 more
We present the COPS-DIGIT-FOOSH (CDF) Herschel spectroscopy data product archive, and related ancillary data products, along with data fidelity assessments, and a user-created archive in collaboration with the Herschel-PACS and SPIRE ICC groups. Our products include datacubes, contour maps, automated line fitting results, and best 1D spectra produ…
Solo dwarfs I: survey introduction and first results for the Sagittarius dwarf irregular galaxy
Côté, P.; Battaglia, G.; Lewis, G. F. +6 more
We introduce the Solitary Local dwarfs survey (Solo), a wide-field photometric study targeting every isolated dwarf galaxy within 3 Mpc of the Milky Way. Solo is based on (u)gi multiband imaging from Canada-France-Hawaii Telescope/MegaCam for northern targets, and Magellan/Megacam for southern targets. All galaxies fainter than MV ≃ -18…
Allsky NICER and NICEST extinction maps based on the 2MASS near-infrared survey
Juvela, M.; Montillaud, J.
Context. Extinction remains one of the most reliable methods of measuring column density of nearby Galactic interstellar clouds. The current and ongoing near-infrared surveys enable the mapping of extinction over large sky areas.
Aims: We produce allsky extinction maps using the 2MASS near-infrared survey.
Methods: We use the NICER and N…
Measurement of the Integrated Sachs-Wolfe Effect Using the AllWISE Data Release
Wright, Edward L.; Shajib, Anowar J.
One of the physical features of a dark-energy-dominated universe is the integrated Sachs-Wolfe (ISW) effect on the cosmic microwave background (CMB) radiation, which gives us a direct observational window to detect and study dark energy. The AllWISE data release of the Wide-field Infrared Survey Explorer (WISE) has a large number of point sources …
Reconnection events in Saturn's magnetotail: Dependence of plasmoid occurrence on planetary period oscillation phase
Jackman, C. M.; Cowley, S. W. H.; Provan, G.
During its exploration of Saturn's magnetotail the Cassini magnetometer has detected many in situ examples of magnetic reconnection, in the form of plasmoids, traveling compression regions (TCRs), and dipolarizations. Meanwhile, many magnetospheric phenomena have been shown to be organized with particular regularity by planetary period oscillation…
The column density distribution of hard X-ray radio galaxies
Venturi, T.; Dallacasa, D.; Ubertini, P. +6 more
In order to investigate the role of absorption in active galactic nuclei (AGN) with jets, we have studied the column density distribution of a hard X-ray selected sample of radio galaxies, derived from the INTEGRAL/Imager on Board the Integral Satellite (IBIS) and Swift/The Burst Alert Telescope (BAT) AGN catalogues (∼7-10 per cent of the total AG…
Properties and Modeling of Unresolved Fine Structure Loops Observed in the Solar Transition Region by IRIS
Warren, Harry P.; Brooks, David H.; Reep, Jeffrey W.
Recent observations from the Interface Region Imaging Spectrograph (IRIS) have discovered a new class of numerous low-lying dynamic loop structures, and it has been argued that they are the long-postulated unresolved fine structures (UFSs) that dominate the emission of the solar transition region. In this letter, we combine IRIS measurements of th…
Observational signatures of past mass-exchange episodes in massive binaries: The case of HD 149 404
Martins, F.; Gosset, E.; Nazé, Y. +4 more
Context. Mass and momentum exchanges in close massive binaries play an important role in their evolution, and produce several observational signatures such as asynchronous rotation and altered chemical compositions, that remain after the stars detach again.
Aims: We investigated these effects for the detached massive O-star binary HD 149 404 …