Search Publications
CO line observations of OH/IR stars in the inner Galactic Bulge: Characteristics of stars at the tip of the AGB
Blommaert, J. A. D. L.; Ryde, N.; Olofsson, H. +10 more
Context. OH/IR stars are examples of late stellar evolution on the asymptotic giant branch (AGB), and they are, as such, important objects to study. They are also excellent probes of stellar populations, in particular in regions of high interstellar extinction such as the central regions of our Galaxy.
Aims: Our goal is to characterise the st…
Distributions of gas and small and large grains in the LkHα 330 disk trace a young planetary system
Zhu, Z.; Ginski, C.; Rosotti, G. +13 more
Planets that are forming around young stars are expected to leave clear imprints in the distribution of the gas and dust of their parental protoplanetary disks. In this paper, we present new scattered light and millimeter observations of the protoplanetary disk around LkHα 330, using SPHERE/VLT and ALMA, respectively. The scattered-light SPHERE ob…
A CHEOPS-enhanced view of the HD 3167 system
Alonso, R.; Deleuil, M.; Erikson, A. +92 more
Much remains to be understood about the nature of exoplanets smaller than Neptune, most of which have been discovered in compact multi-planet systems. With its inner ultra-short period planet b aligned with the star and two larger outer planets d-c on polar orbits, the multi-planet system HD 3167 features a peculiar architecture and offers the pos…
Living on the edge of the Milky Way's central molecular zone. G1.3 is the more likely candidate for gas accretion into the CMZ
Menten, Karl M.; Kauffmann, Jens; Güsten, Rolf +3 more
Context. The 1°.3 (G1.3) and 1°.6 (G1.6) cloud complexes in the central molecular zone (CMZ) of our Galaxy have been proposed to possibly reside at the intersection region of the X1 and X2 orbits for several reasons. This includes the detection of co-spatial low- and high-velocity clouds, high velocity dispersion, high fractional molecular abundan…
NOEMA observations support a recoiling black hole in 3C 186
Capetti, A.; Castignani, G.; Combes, F. +7 more
3C 186 is a powerful radio-loud quasar (a quasi-stellar object) at the center of a cool-core cluster at z = 1.06. Previous studies have reported evidence for a projected spatial offset of ∼1″ between the isophotal center of the galaxy and the point-source quasi-stellar object (QSO) as well as a spectral shift of ∼2000 km s−1 between the…
An extended scattered light disk around AT Pyx. Possible planet formation in a cometary globule
Schmidt, T. O. B.; Henning, T.; Ginski, C. +35 more
Aims: To understand how the multitude of planetary systems that have been discovered come to be, we need to study systems at different evolutionary stages, with different central stars but also in different environments. The most challenging environment for planet formation may be the harsh UV radiation field of nearby massive stars which qui…
GJ 3090 b: one of the most favourable mini-Neptune for atmospheric characterisation
Bouchy, F.; Helled, R.; Mao, S. +37 more
We report the detection of GJ 3090 b (TOI-177.01), a mini-Neptune on a 2.9-day orbit transiting a bright (K = 7.3 mag) M2 dwarf located at 22 pc. The planet was identified by the Transiting Exoplanet Survey Satellite and was confirmed with the High Accuracy Radial velocity Planet Searcher radial velocities. Seeing-limited photometry and speckle im…
Global dynamics and architecture of the Kepler-444 system
Delisle, J. -B.; Udry, S.; Bourrier, V. +3 more
Context. S-type planets, which orbit one component of multiple-star systems, place strong constraints on planet formation and evolution models. A notable case study is Kepler-444, a triple-star system whose primary is orbited by five planets smaller than Venus in a compact configuration, and for which the stellar binary companion revolves around t…
Characterization of the HD 108236 system with CHEOPS and TESS Confirmation of a fifth transiting planet
Alonso, R.; Deleuil, M.; Erikson, A. +87 more
Context. The HD 108236 system was first announced with the detection of four small planets based on TESS data. Shortly after, the transit of an additional planet with a period of 29.54 d was serendipitously detected by CHEOPS. In this way, HD 108236 (V = 9.2) became one of the brightest stars known to host five small transiting planets (Rp
XMM-Newton and SRG/eROSITA observations of the isolated neutron star candidate 4XMM J022141.5−735632
Haberl, F.; Moustakas, J.; Salvato, M. +11 more
We report the results of follow-up investigations of a possible new thermally emitting isolated neutron star (INS),