Search Publications
Upper Limits for Emissions in the Coma of Comet 67P/Churyumov-Gerasimenko near Perihelion as Measured by Rosetta’s Alice Far-UV Spectrograph
Parker, Joel Wm.; Bertaux, Jean-Loup; Stern, S. Alan +13 more
The Alice far-UV imaging spectrograph (700-2050 Å) acquired over 70,000 spectral images during Rosetta’s 2 yr escort mission, including over 20,000 in the months surrounding perihelion when the comet activity level was highest. We have developed automated software to fit and remove ubiquitous H, O, C, S, and CO emissions from Alice spectra, along …
Oscillatory Flows in the Magnetotail Plasma Sheet: Cluster Observations of the Distribution Function
Gunell, H.; Nilsson, H.; Hamrin, M. +7 more
Plasma dynamics in Earth's magnetotail is often studied using moments of the distribution function, which results in losing information on the kinetic properties of the plasma. To better understand oscillatory flows observed in the midtail plasma sheet, we investigate two events, one in each hemisphere, in the transition region between the central…
CoRoT-18 b: Analysis of High-Precision Transit Light Curves with Starspot Features
Heras, A. M.; Gondoin, P.; Schmidt, T. O. B. +4 more
When a planet occults a spotty area on a stellar surface, the flux increases and a characteristic feature in a light curve - a bump - is observed. Among the planets detected by the CoRoT-mission CoRoT-18 is especially interesting as it exhibited spot crossings that we have analyzed in detail. We used four ground-based observations obtained at a 1.…
Gould Belt members in X-ray RAVE: cross-matching RAVE stars with 3XMM point sources
Özkan, M. T.; Plevne, O.; Coşkunoğlu, B.
In this paper the results of matching the RAdial Velocity Experiment (RAVE), a spectroscopic Southern hemisphere survey (
3C 294 revisited: Deep Large Binocular Telescope AO NIR images and optical spectroscopy
Quirrenbach, A.; Gredel, R.; Thompson, D. +11 more
Context. High redshift radio galaxies are among the most massive galaxies at their redshift, are often found at the center of protoclusters of galaxies, and are expected to evolve into the present day massive central cluster galaxies. Thus they are a useful tool to explore structure formation in the young Universe.
Aims:
The puzzling high velocity G5 supergiant star HD 179821: new insight from Gaia DR2 data
Jasniewicz, G.; Parthasarathy, M.; Thěvenin, F.
HD 179821 is classified as G5 Ia star. From the IRAS colors and spectral energy distributions it was classified as a post-AGB star. But some studies classify it as a massive (30 to
Millimeter and Far-IR Study of the IRDC SDC 341.232-0.268
Rubio, M.; Firpo, V.; Cappa, C. E. +3 more
We analyze the molecular gas and dust associated with the infrared dark cloud SDC 341.232-0.268 in order to investigate the characteristics and parameters of the gas, determine the evolutionary status of four embedded EGO candidates, and establish possible infall or outflow gas motions. We base our study on 12CO(2-1), 13CO(2-…
On the weak Lyα emission line of BL Lacertae objects
Bu, Jia; Ma, Ren-Yi; Fang, Tao-Tao +2 more
Recent studies reveal that weak Lyα emission line may be a ubiquitous feature of nearby BL Laceratae objects (BL Lacs). We present a survey of the Lyα emission lines in BL Lacs, with a focus on data obtained by the Cosmic Origins Spectrograph onboard the Hubble Space Telescope. Among the 11 selected targets, seven show a clear detection of the int…
The dynamics of the outer edge of Saturn's A ring perturbed by the satellites Janus and Epimetheus
Cooper, N. J.; Murray, C. D.; El Moutamid, M. +4 more
We present an analytical model to study the dynamics of the outer edge of Saturn's A ring. The latter is influenced by 7:6 mean motion resonances with Janus and Epimetheus. Because of the horseshoe motion of the two co-orbital moons, the ring edge particles are alternately trapped in a corotation eccentricity resonance (CER) or a Lindblad eccentri…
A multi-molecular line study of the star-forming globule CB88-230
Codella, C.; Giannetti, A.; Massi, F. +2 more
Context. This paper relates to low-mass star formation in globules, and the interaction of newly-formed stars with their environment. We follow up on the results of our earlier observations of this globule.
Aims: Our aim is to study the gas- and dust environment of the young stellar object (YSO) in globule CB88 230, the large-scale molecular …