Search Publications
Missions
Journals
Publication Years
Estimating Teff, radius, and luminosity of M-dwarfs using high-resolution optical and NIR spectral features
Baug, Tapas; Mondal, Soumen; Das, Ramkrishna +1 more
We estimate effective temperature (Teff), stellar radius, and luminosity for a sample of 271 M-dwarf stars (M0V-M7V) observed as a part of CARMENES (Calar Alto high-Resolution search for M dwarfs with Exo-earths with Near-infrared and optical Echelle Spectrographs) radial-velocity planet survey. For the first time, using the simultaneou…
High-fidelity comet 67P ephemeris and predictions based on Rosetta data
Weryk, Robert; Farnocchia, Davide; Micheli, Marco +2 more
Because of observational biases and outgassing, comets are notoriously challenging in terms of trajectory estimation and ephemeris predictions. We used tracking data collected by ESA's Rosetta mission at 67P/Churyumov-Gerasimenko to derive 10-m level constraints on the distance between the Earth and 67P in 2014 and 2016, which, together with high-…
CO2 retrievals in the Mars daylight thermosphere from its 4.3 µm limb emission measured by OMEGA/MEx
Bibring, Jean-Pierre; Gondet, Brigitte; Funke, Bernd +6 more
We present a non-local thermodynamic equilibrium retrieval scheme for atmospheric composition and its application to Mars CO2 infrared limb emissions as measured by the OMEGA instrument on board Mars Express (MEx). These emissions are caused by CO2 fluorescence of solar radiation, and thus the retrieval scheme accounts for no…
Chemical evolution of the Galactic bulge as traced by microlensed dwarf and subgiant stars. VIII. Carbon and oxygen
Udalski, A.; Johnson, J. A.; Gould, A. +6 more
Context. Next to H and He, carbon is, together with oxygen, the most abundant element in the Universe and widely used when modelling the formation and evolution of galaxies and their stellar populations. For the Milky Way bulge, there are currently essentially no measurements of carbon in un-evolved stars, hampering our abilities to properly compa…
A MUSE view of the asymmetric jet from HD 163296
Snellen, I. A. G.; Girard, J.; Brinchmann, J. +5 more
Context. Jets and outflows are thought to play important roles in regulating star formation and disk evolution. An important question is how the jets are launched. HD 163296 is a well-studied Herbig Ae star that hosts proto-planet candidates, a protoplanetary disk, a protostellar jet, and a molecular outflow, which makes it an excellent laboratory…
The Quasi-biennial-oscillation-type Signals in the Subsurface Flow Fields during Solar Cycles 23 and 24
Howe, Rachel; Inceoglu, Fadil; Loto'aniu, Paul T. M.
We studied the presence and spatiotemporal evolution of quasi-biennial oscillations (QBOs) in the rotation-rate residuals at target depths of 0.90R⊙, 0.95R⊙, and 0.99R⊙ and at low- (0°-30°), mid- (30°-50°), and high-latitudinal (50°-70°) bands. To achieve these objectives we used data from the Michelson Doppler Ima…
New Herbig-Haro objects and outflows in the Mon R1 association
Movsessian, T. A.; Magakian, T. Yu; Dodonov, S. N.
We present the results of a narrow-band Hα and [S II] imaging survey of the Mon R1 association performed with the 1-m Schmidt telescope at Byurakan Observatory. Our observations covered a 1° field near the centre of the association. As a result of this study, 20 new Herbig-Haro knots were discovered, some of which form collimated outflows. Among t…
ALMA-IRDC - II. First high-angular resolution measurements of the 14N/15N ratio in a large sample of infrared-dark cloud cores
Caselli, P.; Pineda, J. E.; Jiménez-Serra, I. +6 more
The 14N/15N ratio in molecules exhibits a large variation in star-forming regions, especially when measured from N2H+ isotopologues. However, there are only a few studies performed at high-angular resolution. We present the first interferometric survey of the 14N/15N ratio in N…
Dynamical Evolution of an Active-region Filament Driven by Magnetic Reconnection
Hou, Yijun; Li, Ting; Zhang, Jun +1 more
Studying solar filament dynamical evolutions is an important approach to reveal the driving mechanism of solar eruptions, which seriously impact on the Sun-Earth system and could cause disastrous space weather. To better understand the evolution process of solar filaments, here we investigate an active-region filament by employing observations fro…
SN 2013ai: A Link between Hydrogen-rich and Hydrogen-poor Core-collapse Supernovae
Lyman, J. D.; Kirshner, R. P.; Suntzeff, N. B. +33 more
We present a study of the optical and near-infrared (NIR) spectra of SN 2013ai along with its light curves. These data range from discovery until 380 days after explosion. SN 2013ai is a fast declining Type II supernova (SN II) with an unusually long rise time, 18.9 ± 2.7 days in the V-band, and a bright V-band peak absolute magnitude of -18.7 ± 0…