Search Publications
Observations of high-plasma density region in the inner coma of 67P/Churyumov-Gerasimenko during early activity
Edberg, N. J. T.; Simon Wedlund, C.; Eriksson, A. I. +5 more
In 2014 September, as Rosetta transitioned to close bound orbits at 30 km from comet 67P/Churyumov-Gerasimenko, the Rosetta Plasma Consortium Langmuir probe (RPC-LAP) data showed large systematic fluctuations in both the spacecraft potential and the collected currents. We analyse the potential bias sweeps from RPC-LAP, from which we extract three …
AGN-driven perturbations in the intracluster medium of the cool-core cluster ZwCl 2701
Naik, Sachindra; Vagshette, Nilkanth D.; Sonkamble, Satish S. +1 more
We present the results obtained from a total of 123 ks X-ray (Chandra) and 8 h of 1.4 GHz radio (Giant Metrewave Radio Telescope - GMRT) observations of the cool-core cluster ZwCl 2701 (z = 0.214). These observations of ZwCl 2701 showed the presence of an extensive pair of ellipsoidal cavities along the east and west directions within the central …
The apparent synchronization of V1500 Cygni
Harrison, Thomas E.; Campbell, Ryan K.
We have used XMM-Newton and ground-based optical/near-infrared photometry to explore the old classical nova, and asynchronous polar V1500 Cyg. The X-ray light curve shows a single bright phase once per orbit, associated with the main accretion region. Analysis of the X-ray light curve indicates that the white dwarf spin period is now similar to th…
Detailed study of the microwave emission of the supernova remnant 3C 396
de Bernardis, P.; Masi, S.; Piacentini, F. +8 more
We have observed the supernova remnant 3C 396 in the microwave region using the Parkes 64-m telescope. Observations have been made at 8.4, 13.5, and 18.6 GHz and in polarization at 21.5 GHz. We have used data from several other observatories, including previously unpublished observations performed by the Green Bank Telescope at 31.2 GHz, to invest…
Gravity field and solar component of the precession rate and nutation coefficients of Comet 67P/Churyumov-Gerasimenko
Souchay, J.; Lhotka, C.; Reimond, S. +1 more
The aim of this study is first to determine the gravity field of the comet 67P/Churyumov-Gerasimenko and second to derive the solar component of the precession rate and nutation coefficients of the spin-axis of the comet nucleus, I.e. without the direct, usually larger, effect of outgassing. The gravity field and related moments of inertia are obt…
The nuclear dust lane of Circinus: collimation without a torus
Tristram, K. R. W.; Prieto, M. A.; Fernández-Ontiveros, J. A. +1 more
In some AGN, nuclear dust lanes connected to kpc-scale dust structures provide all the extinction required to obscure the nucleus, challenging the role of the dusty torus proposed by the Unified Model. In this letter, we show the pc-scale dust and ionized gas maps of Circinus constructed using sub-arcsec-accuracy registration of infrared VLT AO im…
Properties of the dust in the coma of 67P/Churyumov-Gerasimenko observed with VIRTIS- M
Erard, S.; Piccioni, G.; Bieler, A. +16 more
An investigation is presented of the dust scattering in the coma of 67P/Churyumov-Gerasimenko for the dates of 2015 February 28, March 15 and April 27. A comparison of the morphology of dust continuum maps at 1.1 µm and gas emission shows that for the above dates the spatial distribution of the dust is strongly correlated with H2O…
On the detectability of CO molecules in the interstellar medium via X-ray spectroscopy
García, Javier A.; Kallman, Timothy R.; Gatuzz, Efraín +1 more
We present a study of the detectability of CO molecules in the Galactic interstellar medium using high-resolution X-ray spectra obtained with the XMM-Newton Reflection Grating Spectrometer. We analysed 10 bright low mass X-ray binaries (LMXBs) to study the CO contribution in their line of sights. A total of 25 observations were fitted with the <…
The mass-loss rates of red supergiants at low metallicity: detection of rotational CO emission from two red supergiants in the Large Magellanic Cloud
Matsuura, Mikako; Barlow, M. J.; Meixner, Margaret +9 more
Using the PACS and SPIRE spectrometers on-board the Herschel Space Observatory, we obtained spectra of two red supergiants (RSGs) in the Large Magellanic Cloud (LMC). Multiple rotational CO emission lines (J = 6-5 to 15-14) and 15 H2O lines were detected from IRAS 05280-6910, and one CO line was detected from WOH G64. This is the first …
Masses of the components of SB2s observed with Gaia - II. Masses derived from PIONIER interferometric observations for Gaia validation
Mazeh, T.; Grellmann, R.; Tal-Or, L. +15 more
In anticipation of the Gaia astrometric mission, a sample of spectroscopic binaries is being observed since 2010 with the Spectrograph pour l'Observation des PHénomènes des Intérieurs stellaires et des Exoplanètes (SOPHIE) spectrograph at the Haute-Provence Observatory. Our aim is to derive the orbital elements of double-lined spectroscopic binari…