Search Publications
Cassini Composite Infrared Spectrometer (CIRS) Observations of Titan 2004-2017
Bézard, Bruno; Vinatier, Sandrine; Lellouch, Emmanuel +16 more
From 2004 to 2017, the Cassini spacecraft orbited Saturn, completing 127 close flybys of its largest moon, Titan. Cassini’s Composite Infrared Spectrometer (CIRS), one of 12 instruments carried on board, profiled Titan in the thermal infrared (7-1000 µm) throughout the entire 13 yr mission. CIRS observed on both targeted encounters (flybys) …
XMM-Newton observations of PSR J0726-2612, a radio-loud XDINS
Pintore, Fabio; Mereghetti, Sandro; Turolla, Roberto +4 more
We present the results of an XMM-Newton observation of the slowly rotating (P = 3.4 s), highly magnetized (B ≈ 3 × 1013 G) radio pulsar PSR J0726-2612. A previous X-ray observation with the Chandra satellite showed that some of the properties of PSR J0726-2612 are similar to those of the X-ray-dim isolated neutron stars (XDINSs), a smal…
Properties of the Umbral Filament Observed in Active Region NOAA 12529
Murabito, Mariarita; Guglielmino, Salvo L.; Romano, Paolo +2 more
Recent observations of the solar photosphere revealed the presence of elongated filamentary bright structures inside sunspot umbrae, called umbral filaments (UFs). These features differ in morphology, magnetic configuration, and evolution from light bridges (LBs) that are usually observed to intrude in sunspots. To characterize a UF observed in th…
Fluorine Abundances in the Galactic Disk
Cunha, Katia; Smith, Verne V.; Hayes, Christian R. +5 more
The chemical evolution of fluorine is investigated in a sample of Milky Way red giant stars that span a significant range in metallicity from [Fe/H] ∼ -1.3 to 0.0 dex. Fluorine abundances are derived from vibration-rotation lines of HF in high-resolution infrared spectra near 2.335 µm. The red giants are members of the thin and thick disk/ha…
CPCS 2.0 — new automatic tool for time-domain astronomy
Rybicki, K.; Wyrzykowski, Ł.; Zieliński, P. +3 more
The Cambridge Photometric Calibration Server (CPCS) has been designed to respond to the need of automated rapid photometric data calibration and dissemination for transient events, primarily from Gaia space mission. The Calibration Server has been in operation since 2013 and has been used to calibrate around 50 000 observations of hundreds of tran…
Warm and cool starspots with opposite polarities. A high-resolution Zeeman-Doppler-Imaging study of II Pegasi with PEPSI
Strassmeier, K. G.; Carroll, T. A.; Ilyin, I. V.
Aims: We present a temperature and a magnetic-field surface map of the K2 subgiant of the active binary II Peg. Employed are high resolution Stokes IV spectra obtained with the new Potsdam Echelle Polarimetric and Spectroscopic Instrument (PEPSI) at the Large Binocular Telescope (LBT).
Methods: Fourteen average line profiles are inverted…
The First Direct Observational Confirmation of Kinematic Collisionless Relaxation in Very Low Mach Number Shocks Near the Earth
Balikhin, M. A.; Gedalin, M.; Pope, S. A.
Collisionless shocks are ubiquitous throughout the known universe. They mainly convert the energy of the directed ion flow into heating. Upon crossing the shock front, the ion distribution becomes nongyrotropic. Relaxation to gyrotropy then occurs mainly via kinematic collisionless gyrophase mixing and interaction with waves. The theory of collisi…
Light element variations within the different age-metallicity populations in the nucleus of the Sagittarius dwarf
Cadelano, Mario; Dalessandro, Emanuele; Sills, Alison +2 more
The cluster M54 lies at the centre of the Sagittarius dwarf spheroidal galaxy, and therefore may be the closest example of a nuclear star cluster. Either in situ star formation, inspiralling globular clusters, or a combination have been invoked to explain the wide variety of stellar sub-populations in nuclear star clusters. Globular clusters are k…
The 2018 Martian Global Dust Storm Over the South Polar Region Studied With MEx/VMC
Hueso, R.; Sánchez-Lavega, A.; Titov, D. +6 more
We study the 2018 Martian global dust storm (GDS 2018) over the Southern Polar Region using images obtained by the Visual Monitoring Camera (VMC) on board Mars Express (MEx) during June and July 2018. Dust penetrated into the polar cap region but never covered the cap completely, and its spatial distribution was nonhomogeneous and rapidly changing…
A comparison between solar plage and network properties
Solanki, S. K.; Lagg, A.; van Noort, M. +1 more
Aims: We compare the properties of kG magnetic structures in the solar network and in active region plage at high spatial resolution.
Methods: Our analysis used six SP scans of the solar disc centre aboard Hinode SOT and inverted the obtained spectra of the photospheric 6302 Å line pair using the 2D SPINOR code.
Results: Photospheri…