Search Publications
Missions
Journals
Publication Years
The Gaia-ESO Survey: asymmetric expansion of the Lagoon Nebula cluster NGC 6530 from GES and Gaia DR2
Gilmore, G.; Bayo, A.; Koposov, S. E. +25 more
The combination of precise radial velocities from multi-object spectroscopy and highly accurate proper motions from Gaia DR2 opens up the possibility for detailed 3D kinematic studies of young star-forming regions and clusters. Here, we perform such an analysis by combining Gaia-ESO Survey spectroscopy with Gaia astrometry for ∼900 members of the …
Aliphatic and aromatic hydrocarbons in comet 67P/Churyumov-Gerasimenko seen by ROSINA
Altwegg, K.; Balsiger, H.; Fuselier, S. A. +10 more
Context. Unlike all previous cometary space missions, the Rosetta spacecraft accompanied its target, comet 67P/Churyumov-Gerasimenko, for more than two years on its way around the Sun. Thereby, an unexpected diversity and complexity of the chemical composition was revealed.
Aims: Our first step of decrypting the exact chemical composition of …
J-PLUS: Identification of low-metallicity stars with artificial neural networks using SPHINX
Caballero, J. A.; Mendes de Oliveira, C.; Beers, T. C. +24 more
Context. We present a new methodology for the estimation of stellar atmospheric parameters from narrow- and intermediate-band photometry of the Javalambre Photometric Local Universe Survey (J-PLUS), and propose a method for target pre-selection of low-metallicity stars for follow-up spectroscopic studies. Photometric metallicity estimates for star…
A dust and gas cavity in the disc around CQ Tau revealed by ALMA
Henning, Thomas; Kwon, Woojin; Testi, Leonardo +23 more
The combination of high-resolution and sensitivity offered by ALMA is revolutionizing our understanding of protoplanetary discs, as their bulk gas and dust distributions can be studied independently. In this paper we present resolved ALMA observations of the continuum emission (λ = 1.3 mm) and CO isotopologues (12CO, 13CO, C<…
Discovery of a Very Hot Phase of the Milky Way Circumgalactic Medium with Non-solar Abundance Ratios
Nicastro, Fabrizio; Mathur, Smita; Das, Sanskriti +1 more
We present the discovery of a very hot gas phase of the Milky Way circumgalactic medium (CGM) at T ≈ 107 K, using deep XMM-Newton Reflection Grating Spectrometer observations of the blazar 1ES 1553+113. The hot gas, coexisting with a warm-hot phase at T ≈ 106 K is α-enhanced, with [{{O}}/{Fe}]={0.9}-0.3+0.7
Giant Planet Occurrence within 0.2 au of Low-luminosity Red Giant Branch Stars with K2
Huber, Daniel; Gaidos, Eric; Stello, Dennis +3 more
Every Sun-like star will eventually evolve into a red giant, a transition which can profoundly affect the evolution of a surrounding planetary system. The timescale of dynamical planet evolution and orbital decay has important implications for planetary habitability, as well as post-main-sequence star and planet interaction, evolution, and interna…
ALMA and HST Kiloparsec-scale Imaging of a Quasar-galaxy Merger at Z ≈ 6.2
Carilli, Chris; Strauss, Michael A.; Fan, Xiaohui +12 more
We present kiloparsec-scale Atacama Large Millimeter/submillimeter Array (ALMA) and Hubble Space Telescope imaging of the quasar PJ308-21 at z = 6.2342, tracing dust, gas (via the [C II] 158 µm line), and young stars. At a resolution of ∼0.″3 (≈1.7 kpc), the system is resolved over >4″ (>20 kpc). In particular, it features a main compo…
SIGNALS: I. Survey description
Barmby, P.; Morisset, C.; Lyman, J. D. +61 more
SIGNALS, the Star formation, Ionized Gas, and Nebular Abundances Legacy Survey, is a large observing programme designed to investigate massive star formation and H II regions in a sample of local extended galaxies. The programme will use the imaging Fourier transform spectrograph SITELLE at the Canada-France-Hawaii Telescope. Over 355 h (54.7 nigh…
Turning Gravitationally Lensed Supernovae into Cosmological Probes
Rodney, S.; Pierel, J. D. R.
Recently, there have been two landmark discoveries of gravitationally lensed supernovae: the first multiply imaged SN, “Refsdal”, and the first Type Ia SN resolved into multiple images, SN iPTF16geu. Fitting the multiple light curves of such objects can deliver measurements of the lensing time delays, which are the difference in arrival times for …
The changing temperature of the nucleus of comet 67P induced by morphological and seasonal effects
Bellucci, G.; Kührt, E.; Mottola, S. +31 more
Knowledge of the surface temperature distribution on a comet's nucleus and its temporal evolution at different timescales is key to constraining its thermophysical properties and understanding the physical processes that take place at and below the surface. Here we report on time-resolved maps of comet 67P/Churyumov-Gerasimenko retrieved on the ba…