Search Publications
Distribution of ionized, atomic, and PDR gas around S 1 in ρ Ophiuchus
Güsten, R.; Riquelme, D.; Mookerjea, B. +5 more
The early B star S 1 in the ρ Ophiuchus cloud excites an H II region and illuminates a large egg-shaped photon-dominated (PDR) cavity. The PDR is restricted to the west and southwest by the dense molecular ρ Oph A ridge, expanding more freely into the diffuse low-density cloud to the northeast. We analyzed new SOFIA GREAT, GMRT, and APEX data toge…
An unbiased NOEMA 2.6 to 4 mm survey of the GG Tau ring: First detection of CCS in a protoplanetary disk
Chapillon, E.; Coutens, A.; Beck, T. L. +13 more
Context. Molecular line surveys are among the main tools to probe the structure and physical conditions in protoplanetary disks (PPDs), the birthplace of planets. The large radial and vertical temperature as well as density gradients in these PPDs lead to a complex chemical composition, making chemistry an important step to understand the variety …
The SOPHIE search for northern extrasolar planets. XVIII. Six new cold Jupiters, including one of the most eccentric exoplanet orbits
Bouchy, F.; Deleuil, M.; Moutou, C. +28 more
Context. Due to their low transit probability, the long-period planets are, as a population, only partially probed by transit surveys. Radial velocity surveys thus have a key role to play, in particular for giant planets. Cold Jupiters induce a typical radial velocity semi-amplitude of 10 m s−1, which is well within the reach of multipl…
Resolving the inner accretion flow towards the central supermassive black hole in SDSS J1339+1310
Goicoechea, L. J.; Sergeyev, A. V.; Shalyapin, V. N. +2 more
We studied the accretion disc structure in the doubly imaged lensed quasar SDSS J1339+1310 using r-band light curves and UV-visible to near-IR spectra from the first 11 observational seasons after its discovery. The 2009-2019 light curves displayed pronounced microlensing variations on different timescales, and this microlensing signal permitted u…
Core-collapse supernova subtypes in luminous infrared galaxies
Gromadzki, M.; Galbany, L.; Inserra, C. +34 more
The fraction of core-collapse supernovae (CCSNe) occurring in the central regions of galaxies is not well constrained at present. This is partly because large-scale transient surveys operate at optical wavelengths, making it challenging to detect transient sources that occur in regions susceptible to high extinction factors. Here we present the di…
YY Hya and its interstellar environment
Thorstensen, John R.; Fesen, Robert A.; Przybilla, Norbert +7 more
Context. During a search for previously unknown Galactic emission nebulae, we discovered a faint 36' diameter Hα emission nebula centered around the periodic variable YY Hya. Although this star has been classified as an RR-Lyr variable, such a classification is inconsistent with a Gaia distance of ≃450 pc. The GALEX image data also show YY Hya as …
The hot interstellar medium towards 4U 1820-30: a Bayesian analysis
Waters, L. B. F. M.; Costantini, E.; Mehdipour, M. +3 more
Context. High-ionisation lines in the soft X-ray band are generally associated to either interstellar hot gas along the line of sight or to photoionised gas intrinsic to the source. In the low-mass X-ray binary 4U 1820-30, the nature of these lines is not well understood.
Aims: We aim to characterise the ionised gas present along the line of …
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…
NGTS-13b: a hot 4.8 Jupiter-mass planet transiting a subgiant star
Jordán, Andrés; Wheatley, Peter J.; Bayliss, Daniel +31 more
We report the discovery of the massive hot Jupiter NGTS-13b by the Next Generation Transit Survey (NGTS). The V = 12.7 host star is likely in the subgiant evolutionary phase with logg* = 4.04 ± 0.05, Teff = 5819 ± 73 K, M* = 1.30−0.18+0.11 M⊙, and R* = 1.79 ± 0.06 R⊙…