Search Publications
Transit least-squares survey. II. Discovery and validation of 17 new sub- to super-Earth-sized planets in multi-planet systems from K2
Heller, René; Hippke, Michael; Rodenbeck, Kai
The extended Kepler mission (K2) has revealed more than 500 transiting planets in roughly 500 000 stellar light curves. All of these were found either with the box least-squares algorithm or by visual inspection. Here we use our new transit least-squares (TLS) algorithm to search for additional planets around all K2 stars that are currently known …
Systematic investigation of chemical abundances derived using IR spectra obtained with GIANO
Ryde, N.; Ludwig, H. -G.; Bonifacio, P. +11 more
Context. Detailed chemical abundances of Galactic stars are needed in order to improve our knowledge of the formation and evolution of our galaxy, the Milky Way.
Aims: We took advantage of the GIANO archive spectra to select a sample of Galactic disc stars in order to derive their chemical inventory and to compare the abundances we derived fr…
New type II Cepheids from VVV data towards the Galactic center
Minniti, D.; Zoccali, M.; Contreras Ramos, R. +5 more
Context. The Galactic center (GC) is the densest region of the Milky Way. Variability surveys towards the GC potentially provide the largest number of variable stars per square degree within the Galaxy. However, high stellar density is also a drawback due to blending. Moreover, the GC is affected by extreme reddening, therefore near infrared obser…
Another relic bulge globular cluster: ESO 456-SC38 (Djorgovski 2)
Momany, Y.; Held, E. V.; Saviane, I. +7 more
Context. The object ESO 456-SC38 (Djorgovski 2) is one of the globular clusters that is closest to the Galactic center. It is on the blue horizontal branch and has a moderate metallicity of [Fe/H] ∼ -1.0. It is thus similar to the very old inner bulge globular clusters NGC 6522, NGC 6558, and HP 1, and therefore appears to be part of the primeval …
Dust properties in the cold and hot gas phases of the ATLAS3D early-type galaxies as revealed by AKARI
Kaneda, H.; Murata, K.; Yamagishi, M. +6 more
Context. The properties of the dust in the cold and hot gas phases of early-type galaxies (ETGs) are key to understanding ETG evolution.
Aims: We aim to conduct a systematic study of the dust in a large sample of local ETGs, focusing on relations between the dust and the molecular, atomic, and X-ray gas of the galaxies, as well as their envir…
J-PLUS: A wide-field multi-band study of the M 15 globular cluster. Evidence of multiple stellar populations in the RGB
Cortesi, Arianna; Chies-Santos, Ana L.; Mendes de Oliveira, Claudia +21 more
Context. As a consequence of internal and external dynamical processes, Galactic globular clusters (GCs) have properties that vary radially. Wide-field observations covering the entire projected area of GCs out to their tidal radii (rtidal) can therefore give crucial information on these important relics of the Milky Way formation era. …
Exploring the innermost dust formation region of the oxygen-rich AGB star IK Tauri with VLT/SPHERE-ZIMPOL and VLTI/AMBER
Ohnaka, K.; Adam, C.
Context. Low- and intermediate-mass stars on the asymptotic giant branch (AGB) are known to be prevalent dust providers to galaxies, replenishing the surrounding medium with molecules and dust grains. However, the mechanisms responsible for the formation and acceleration of dust in the cool extended atmospheres of AGB stars are still open to debat…
Detection and Doppler monitoring of K2-285 (EPIC 246471491), a system of four transiting planets smaller than Neptune
Kuzuhara, M.; Alonso, R.; Deeg, H. +43 more
Context. The Kepler extended mission, also known as K2, has provided the community with a wealth of planetary candidates that orbit stars typically much brighter than the targets of the original mission. These planet candidates are suitable for further spectroscopic follow-up and precise mass determinations, leading ultimately to the construction …
Fragmentation and filaments at the onset of star and cluster formation. SABOCA 350 µm view of ATLASGAL-selected massive clumps
Menten, K. M.; Weiss, A.; Csengeri, T. +4 more
Context. The structure formation of the dense interstellar material and the fragmentation of clumps into cores is a fundamental step for understanding how stars and stellar clusters form.
Aims: We aim to establish a statistical view of clump fragmentation at subparsec scales based on a large sample of massive clumps selected from the ATLASGAL…
The OTELO survey. I. Description, data reduction, and multi-wavelength catalogue
Bland-Hawthorn, Joss; Cabrera-Lavers, Antonio; Gallego, Jesús +21 more
Context. The evolution of galaxies through cosmic time is studied observationally by means of extragalactic surveys. The usefulness of these surveys is greatly improved by increasing the cosmological volume, in either depth or area, and by observing the same targets in different wavelength ranges. A multi-wavelength approach using different observ…