Search Publications
The survey of planetary nebulae in Andromeda (M 31). I. Imaging the disc and halo with MegaCam at the CFHT
Caldwell, Nelson; Gerhard, Ortwin; Arnaboldi, Magda +4 more
Context. The Andromeda (M 31) galaxy subtends nearly 100 square degrees on the sky. Any study of its halo must therefore account for the severe contamination from the Milky Way halo stars whose surface density displays a steep gradient across the entire M 31 field of view.
Aims: Our goal is to identify a population of stars firmly associated …
HARPS-N radial velocities confirm the low densities of the Kepler-9 planets
Poretti, E.; Sozzetti, A.; Piotto, G. +20 more
We investigated the discrepancy between planetary mass determinations using the transit timing variations (TTVs) and radial velocities (RVs), by analysing the multiplanet system Kepler-9. Despite being the first system characterized with TTVs, there are several discrepant solutions in the literature, with those reporting lower planetary densities …
When the tale comes true: multiple populations and wide binaries in the Orion Nebula Cluster
Manara, Carlo F.; Petr-Gotzens, Monika G.; Boffin, Henri M. J. +5 more
Context. Recently published high-quality OmegaCAM photometry of the 3 × 3 deg around the Orion Nebula Cluster (ONC) in r, and i filters revealed three well-separated pre-main sequences in the color-magnitude diagram (CMD). The objects belonging to the individual sequences are concentrated toward the center of the ONC. The authors concluded that th…
Distributed glycine in comet 67P/Churyumov-Gerasimenko
Lasue, J.; Altwegg, K.; Biver, N. +10 more
Most of the gaseous molecules that are detected in cometary atmospheres are produced through sublimation of nucleus ices. Distributed sources may also occur, that is, production within the coma, from the solid component of dust particles that are ejected from the nucleus. Glycine, the simplest amino acid, was observed episodically in the atmospher…
Star Formation and ISM Properties in the Host Galaxies of Three Far-infrared Luminous Quasars at z ∼ 6
Strauss, Michael A.; Fan, Xiaohui; Jiang, Linhua +11 more
We present Karl G. Jansky Very Large Array observations of the CO (2-1) line emission toward three far-infrared luminous quasars at z ∼ 6: SDSS J231038.88+185519.7 and SDSS J012958.51-003539.7 with ∼0.″6 resolution and SDSS J205406.42-000514.8 with ∼2.″1 resolution. All three sources are detected in the CO (2-1) line emission—one source is margina…
Substructure and halo population of Double Cluster h and χ Persei
Chen, Li; Zhong, Jing; Li, Lu +3 more
Context. Gaia DR2 provides an ideal dataset to study the stellar populations of open clusters at larger spatial scales because the cluster member stars can be well identified by their location in the multidimensional observational parameter space with high precision parameter measurements.
Aims: In order to study the stellar population and po…
Imaging the Thermal and Kinematic Sunyaev-Zel'dovich Effect Signals in a Sample of 10 Massive Galaxy Clusters: Constraints on Internal Velocity Structures and Bulk Velocities
Mroczkowski, Tony; Cibirka, Nathália; Zitrin, Adi +10 more
We have imaged the Sunyaev-Zel'dovich (SZ) effect signals at 140 and 270 GHz toward 10 galaxy clusters with Bolocam and AzTEC/ASTE. We also used Planck data to constrain the signal at large angular scales, Herschel-SPIRE images to subtract the brightest galaxies that comprise the cosmic infrared background (CIB), Chandra imaging to map the electro…
Stellar Rotation and the Extended Main-sequence Turnoff in the Open Cluster NGC 5822
Albrow, Michael D.; Deng, Licai; de Grijs, Richard +1 more
The origin of extended main-sequence turnoffs (eMSTOs) in intermediate-age (1-3 Gyr) clusters is one of the most intriguing questions in current star cluster research. Unlike the split main sequences found in some globular clusters, which are caused by bimodal populations in age and/or chemical abundances, eMSTOs are believed to be due to stellar …
HATS-60b-HATS-69b: 10 Transiting Planets from HATSouth
Arriagada, P.; Butler, R. P.; Henning, Th. +27 more
We report the discovery of 10 transiting extrasolar planets by the HATSouth survey. The planets range in mass from the super-Neptune HATS-62b, with {M}p< 0.179 {M}{{J}}, to the super-Jupiter HATS-66b, with {M}p=5.33 {M}{{J}}, and in size from the Saturn HATS-69b, with {R}p=0.94 {R}{{J<…
Identifying Sagittarius Stream Stars by Their APOGEE Chemical Abundance Signatures
Bizyaev, Dmitry; Pan, Kaike; Cunha, Katia +17 more
The SDSS-IV Apache Point Observatory Galactic Evolution Experiment (APOGEE) survey provides precise chemical abundances of 18 chemical elements for ∼176,000 red giant stars distributed over much of the Milky Way Galaxy (MW), and includes observations of the core of the Sagittarius dwarf spheroidal galaxy (Sgr). The APOGEE chemical abundance patter…