Search Publications
ACS experiment for atmospheric studies on "ExoMars-2016" Orbiter
Montmessin, F.; Fedorova, A. A.; Shakun, A. V. +6 more
ACS is a set of spectrometers for atmospheric studies (Atmospheric Chemistry Suite). It is one of the Russian instruments for the Trace Gas Orbiter (TGO) of the Russian-European "ExoMars" program. The purpose of the experiment is to study the Martian atmosphere by means of two observations regimes: sensitive trace gases measurements in solar occul…
Spatially resolved kinematic observations of the planetary nebulae Hen 3-1333 and Hen 2-113.
Parker, Q. A.; Danehkar, A.
We have performed integral field spectroscopy of the planetary nebulae Hen 3-1333 (PNG332.9-09.9) and Hen 2-113 (PNG321.0+03.9), which are unusual in exhibiting dual-dust chemistry and multipolar lobes but also ionized by late-type [WC 10] central stars. The spatially resolved velocity distributions of the Hα emission line were used to determine t…
Theoretical Clues to the Ultraviolet Diversity of Type Ia Supernovae
Baron, E.; Wang, Lifan; Milne, Peter +2 more
The effect of metallicity on the observed light of Type Ia supernovae (SNe Ia) could lead to systematic errors as the absolute magnitudes of local and distant SNe Ia are compared to measure luminosity distances and determine cosmological parameters. The UV light may be especially sensitive to metallicity, though different modeling methods disagree…
What powers Lyα blobs?
Menten, K. M.; Omont, A.; Lagache, G. +14 more
Lyα blobs (LABs) are spatially extended Lyα nebulae seen at high redshift. The origin of Lyα emission in the LABs is still unclear and under debate. To study their heating mechanism(s), we present Australia Telescope Compact Array (ATCA) observations of the 20 cm radio emission and Herschel PACS and SPIRE measurements of the far-infrared (FIR) emi…
Discovery of true, likely and possible symbiotic stars in the dwarf spheroidal NGC 205
Gonçalves, Denise R.; Akras, Stavros; Magrini, Laura +1 more
In this paper we discuss the photometric and spectroscopic observations of newly discovered (symbiotic) systems in the dwarf spheroidal galaxy NGC 205. The Gemini Multi-Object Spectrograph on-off band [O III] 5007 Å emission imaging highlighted several [O III] line emitters, for which optical spectra were then obtained. The detailed study of the s…
A Chandra Search for a Pulsar Wind Nebula around PSR B1055-52
Pavlov, G. G.; Posselt, B.; Spence, G.
The nearby, middle-aged PSR B1055-52 has many properties in common with the Geminga pulsar. Motivated by the Geminga's enigmatic and prominent pulsar wind nebula (PWN), we searched for extended emission around PSR B1055-52 with Chandra ACIS. For an energy range 0.3-1 keV, we found a 4σ flux enhancement in a 4\buildrel{\prime\prime}\over{.} 9-20
Dynamical masses of a nova-like variable on the edge of the period gap
Gänsicke, B. T.; Dhillon, V. S.; Marsh, T. R. +12 more
We present the first dynamical determination of the binary parameters of an eclipsing SW Sextantis star in the 3-4 h orbital period range during a low state. We obtained time-resolved optical spectroscopy and photometry of HS 0220+0603 during its 2004-2005 low-brightness state, as revealed in the combined Small & Moderate Aperture Research Tel…
Detection of satellite remnants in the Galactic halo with Gaia- III. Detection limits for ultrafaint dwarf galaxies
Figueras, F.; Brown, A. G. A.; Antoja, T. +8 more
We present a method to identify ultrafaint dwarf galaxies (UFDGs) candidates in the halo of the Milky Way using the future Gaia catalogue and we explore its detection limits and completeness. The method is based on the Wavelet Transform and searches for overdensities in the combined space of sky coordinates and proper motions, using kinematics in …
The Grism Lens-Amplified Survey from Space (GLASS). V. Extent and Spatial Distribution of Star Formation in z ~ 0.5 Cluster Galaxies
Fontana, Adriano; Pentericci, Laura; Schmidt, Kasper B. +14 more
We present the first study of the spatial distribution of star formation in z ∼ 0.5 cluster galaxies. The analysis is based on data taken with the Wide Field Camera 3 as part of the Grism Lens-Amplified Survey from Space (GLASS). We illustrate the methodology by focusing on two clusters (MACS 0717.5+3745 and MACS 1423.8+2404) with different morpho…
Groove formation on Phobos: Testing the Stickney ejecta emplacement model for a subset of the groove population
Head, James W.; Wilson, Lionel
Numerous theories have been proposed for the formation of grooves on Phobos, and no single explanation is likely to account fully for the wide variety of observed groove morphologies and orientations. One set of grooves is geographically associated with the impact crater Stickney. We test the hypothesis that these grooves were formed by clasts tha…