Search Publications
SPIRE imaging of M 82: Cool dust in the wind and tidal streams
Elbaz, D.; Bock, J. J.; Clements, D. L. +57 more
M 82 is a unique representative of a whole class of galaxies, starbursts with superwinds, in the Very Nearby Galaxy Survey with Herschel. In addition, its interaction with the M 81 group has stripped a significant portion of its interstellar medium from its disk. SPIRE maps now afford better characterization of the far-infrared emission from cool …
Cusp as a source for oxygen in the plasma sheet during geomagnetic storms
Dandouras, I.; Klecker, B.; Kistler, L. M. +1 more
We have used the ion composition data from the CIS/CODIF instrument on Cluster to determine how the O+ population in the plasma sheet and the adjacent lobes changes during geomagnetic storms. The Cluster trajectory, which moves over the polar cap, into the lobe, and then into the plasma sheet on each orbit, allows us to track the change…
Sensitive limits on the abundance of cold water vapor in the DM Tauri protoplanetary disk
de Graauw, Th.; Liseau, R.; Braine, J. +61 more
We performed a sensitive search for the ground-state emission lines of ortho- and para-water vapor in the DM Tau protoplanetary disk using the Herschel/HIFI instrument. No strong lines are detected down to 3σ levels in 0.5 km s-1 channels of 4.2 mK for the 110-101 line and 12.6 mK for the 111-000
Infrared Spectra and Optical Constants of Nitrile Ices Relevant to Titan's Atmosphere
Moore, Marla H.; Ferrante, Robert F.; Moore, W. James +1 more
Spectra and optical constants of nitrile ices known or suspected to be in Titan's atmosphere are presented from 2.0 to 333.3 µm (~5000-30 cm-1). These results are relevant to the ongoing modeling of Cassini CIRS observations of Titan's winter pole. Ices studied are: HCN, hydrogen cyanide; C2N2, cyanogen; CH
FIR colours and SEDs of nearby galaxies observed with Herschel
Elbaz, D.; Ciesla, L.; Okumura, K. +78 more
We present infrared colours (in the 25-500 µm spectral range) and UV to radio continuum spectral energy distributions of a sample of 51 nearby galaxies observed with SPIRE on Herschel. The observed sample includes all morphological classes, from quiescent ellipticals to active starbursts. Active galaxies have warmer colour temperatures than …
Hip 63510C, Hip 73786B, and nine new isolated high proper motion T dwarf candidates from UKIDSS DR6 and SDSS DR7
Scholz, R. -D.
Aims: Completing the poorly known substellar census of the solar neighbourhood, especially with respect to the coolest brown dwarfs, will lead to a better understanding of failed star formation processes and binary statistics with different environmental conditions.
Methods: Using UKIDSS data and their cross-correlation with the SDSS, we…
First Complete Determination of Plasma Physical Parameters Across a Coronal Mass Ejection-driven Shock
Bemporad, A.; Mancuso, S.
We report on the study of a fast coronal mass ejection (CME)-driven shock associated with the solar eruption of 2002 March 22. This event was observed in the intermediate corona both in white light and the extreme ultraviolet (EUV) by the LASCO and UVCS instruments on board the Solar and Heliospheric Observatory, as well as in metric and decametri…
Photometric Determination of the Mass Accretion Rates of Pre-main-sequence Stars. I. Method and Application to the SN 1987A Field
Panagia, Nino; De Marchi, Guido; Romaniello, Martino
We have developed and successfully tested a new self-consistent method to reliably identify pre-main-sequence (PMS) objects actively undergoing mass accretion in a resolved stellar population, regardless of their age. The method does not require spectroscopy and combines broadband V and I photometry with narrowband Hα imaging to (1) identify all s…
Dark Matter Search Using Chandra Observations of Willman 1 and a Spectral Feature Consistent with a Decay Line of a 5 keV Sterile Neutrino
Loewenstein, Michael; Kusenko, Alexander
We report the results of a search for an emission line from radiatively decaying dark matter in the Chandra X-ray Observatory spectrum of the ultra-faint dwarf spheroidal galaxy Willman 1. 99% confidence line flux upper limits over the 0.4-7 keV Chandra bandpass are derived and mapped to an allowed region in the sterile neutrino mass-mixing angle …
Kernel Phase in Fizeau Interferometry
Martinache, Frantz
The detection of high contrast companions at small angular separation appears feasible in conventional direct images using the self-calibration properties of interferometric observable quantities. The friendly notion of closure phase, which is key to the recent observational successes of non-redundant aperture masking interferometry used with adap…