Search Publications
Physical conditions in the gas phases of the giant H II region LMC-N 11. II. Origin of [C II] and fraction of CO-dark gas
Lebouteiller, V.; Madden, S. C.; Galliano, F. +11 more
Context. The ambiguous origin of the [C II] 158µm line in the interstellar medium complicates its use for diagnostics concerning the star-formation rate and physical conditions in photodissociation regions.
Aims: We investigate the origin of [C II] in order to measure the total molecular gas content, the fraction of CO-dark H2
Properties of the singing comet waves in the 67P/Churyumov-Gerasimenko plasma environment as observed by the Rosetta mission
Eriksson, A.; Karlsson, T.; Volwerk, M. +9 more
Using in situ measurements from different instruments on board the Rosetta spacecraft, we investigate the properties of the newly discovered low-frequency oscillations, known as singing comet waves, that sometimes dominate the close plasma environment of comet 67P/Churyumov-Gerasimenko. These waves are thought to be generated by a modified ion-Wei…
Complex molecular gas kinematics in the inner 5 kpc of 4C12.50 as seen by ALMA
Combes, F.; Salomé, P.; Dasyra, K. M. +2 more
The nearby system 4C12.50, also known as IRAS 13451+1217 and PKS 1345+12, is a merger of gas-rich galaxies with infrared and radio activity. It has a perturbed interstellar medium (ISM) and a dense configuration of gas and dust around the nucleus. The radio emission at small (∼100 pc) and large (∼100 kpc) scales, as well as the large X-ray cavity …
A new study towards PSR J1826-1334 and PSR J1826-1256 in the region of HESS J1825-137 and HESS J1826-130
Giacani, E.; Duvidovich, L.; Castelletti, G. +2 more
Aims: The goal of this paper is to detect synchrotron emission from the relic electrons of the crushed pulsar wind nebula (PWN) HESS J1825-137 and to investigate the origin of the γ-ray emission from HESS J1826-130.
Methods: The study of HESS J1825-137 was carried out on the basis of new radio observations centred at the position of PSR …
Secondary eclipse of the hot Jupiter WASP-121b at 2 µm
Kovács, Géza; Kovács, Tamás
Ground-based observations of the secondary eclipse in the 2MASS K band are presented for the hot Jupiter WASP-121b. These are the first occultation observations of an extrasolar planet that were carried out with an instrument attached to a 1 m class telescope (the SMARTS 1.3 m). We find a highly significant eclipse depth of (0.228 ± 0.023)%. Toget…
MASCARA-3b. A hot Jupiter transiting a bright F7 star in an aligned orbit
Snellen, I. A. G.; Grundahl, F.; Hjorth, M. +12 more
We report the discovery of MASCARA-3b, a hot Jupiter orbiting its bright (V = 8.33) late F-type host every 5.55149 ± 0.00001 days in an almost circular orbit (e = 0.050-0.017+0.020). This is the fourth exoplanet discovered with the Multi-site All-Sky CAmeRA (MASCARA), and the first of these that orbits a late-type star. Follo…
Be and O in the ultra metal-poor dwarf 2MASS J18082002-5104378: the Be-O correlation
Bonifacio, P.; Caffau, E.; Spite, M. +3 more
Context. Measurable amounts of Be could have been synthesised primordially if the Universe were non-homogeneous or in the presence of late decaying relic particles.
Aims: We investigate the Be abundance in the extremely metal-poor star 2MASS J1808-5104 ([Fe/H] = -3.84) with the aim of constraining inhomogeneities or the presence of late decay…
Nuclear angular momentum of early-type galaxies hosting nuclear star clusters
Lyubenova, Mariya; Tsatsi, Athanassia
Context. Nucleation is a common phenomenon in all types of galaxies and at least 70% of them host nuclear star clusters (NSCs) in their centres. Many of the NSCs co-habit with supermassive black holes and follow similar scaling relations with host galaxy properties. Unlike black holes, NSCs, preserve the signature of their evolutionary path imprin…
Properties of LBGs with [OIII] detection at z ∼ 3.5. The importance of including nebular emission data in SED fitting
Burgarella, Denis; Boquien, Médéric; Yuan, Fang-Ting +3 more
Context. Nebular emission lines are critical to measure physical properties in the ionized gas (e.g., metallicity, the star formation rate, or dust attenuation). They also account for a significant fraction of broadband fluxes, in particular at the highest redshifts, and therefore can strongly affect the determination of other physical properties,…
Exploring the damping of Alfvén waves along a long off-limb coronal loop, up to 1.4 R⊙
Mason, H. E.; Del Zanna, G.; Gupta, G. R.
The Alfvén wave energy flux in the corona can be explored using the electron density and velocity amplitude of the waves. The velocity amplitude of Alfvén waves can be obtained from the non-thermal velocity of spectral line profiles. Previous calculations of the Alfvén wave energy flux with height in active regions and polar coronal holes have pro…