Search Publications
Phase angle dependence of the dust cross section in a cometary coma. A simple numerical model
Agarwal, J.; Markkanen, J.; Keiser, F.
Context. Rosetta/OSIRIS took optical measurements of the intensity of scattered light from the coma of 67P/Churyumov-Gerasimenko over a wide range of phase angles. These data have been used to measure the phase angle dependent radiance profile of the dust coma.
Aims: We want to provide information about the column area densities of the dust c…
NGTS discovery of a highly inflated Saturn-mass planet and a highly irradiated hot Jupiter. NGTS-26 b and NGTS-27 b
Bouchy, F.; Erikson, A.; Alves, D. R. +31 more
We report the discovery of two new transiting giant exoplanets NGTS-26 b and NGTS-27 b by the Next Generation Transit Survey (NGTS). NGTS-26 b orbits around a G6-type main sequence star every 4.52 days. It has a mass of 0.29-0.06+0.07 MJup and a radius of 1.33-0.05+0.06 RJup making …
High-resolution spectroscopy of the intermediate polar EX Hydrae. II. The inner disk radius
Beuermann, K.; Reinsch, K.
An isotropic full-sky sample of optically selected blazars
Kudenko, Maria; Troitsky, Sergey
Context. Various high-energy phenomena in the Universe are associated with blazars, which are powerful active galaxies with jets pointing at the observer. Novel results relating blazars to high-energy neutrinos, cosmic rays, and even possible manifestations of new particle physics, often emerge from statistical analyses of blazar samples, and unif…
OGLE-BLAP-001 and ZGP-BLAP-08: Two possible magnetic blue large-amplitude pulsators
Pigulski, Andrzej; Kołaczek-Szymański, Piotr A.; Święch, Marta +2 more
Blue large-amplitude pulsators (BLAPs) are a newly discovered group of compact pulsating stars whose origins are yet to be explained. Of the existing evolutionary scenarios that could lead to the formation of BLAPs, there are two positing that BLAPs are the products of the merger of two stars: either a main-sequence star and a helium white dwarf o…
TOI-3568 b: A super-Neptune in the sub-Jovian desert
Moutou, C.; Carmona, A.; Donati, J. -F. +42 more
The sub-Jovian desert is a region in the mass-period and radius-period parameter space that typically encompasses short-period ranges between super-Earths and hot Jupiters, and exhibits an intrinsic dearth of planets. This scarcity is likely shaped by photoevaporation caused by the stellar irradiation received by giant planets that have migrated i…
Spectroscopic evidence of a possible young stellar cluster at the Galactic Center
Najarro, F.; Nogueras-Lara, F.; Schödel, R. +3 more
Context. The nuclear stellar disk has been the most prolific star-forming region in the Milky Way over the past ∼30 million years. Notably, the cumulative mass of the three clusters currently found in the nuclear stellar disk, the Quintuplet, the Arches, and the Nuclear clusters, amounts to just 10% of the total anticipated mass of young stars tha…
Charge sign dependence of recurrent Forbush decreases in 2016–2017
Heber, B.; Romaneehsen, L.; Marquardt, J.
Context. This study investigates the periodicities of galactic cosmic ray flux attributed to corotating interaction regions (CIRs) using Alpha Magnetic Spectrometer (AMS-02) data from late 2016 to early 2017. Aims. We determine the rigidity dependence of recurrent Forbush decrease (RFD) amplitudes induced by CIRs for different particles with a foc…
Unraveling the birthplaces of NGC 2070's massive stars, tracked with MUSE and revealed with JWST
Castro, N.
The formation of massive O-type stars cannot be simply explained as a scaled-up version of the accretion mechanisms observed in lower-mass stars. Understanding these processes necessitates systematic studies of their early stages, which are challenging to identify. Forming massive stars remain embedded in their dense nursery clouds, and IR instrum…
Hubble Asteroid Hunter. III. Physical properties of newly found asteroids
Popescu, Marcel; Carry, Benoit; Evans, Robin W. +5 more
Context. Determining the size distribution of asteroids is key to understanding the collisional history and evolution of the inner Solar System.
Aims: We aim to improve our knowledge of the size distribution of small asteroids in the main belt by determining the parallaxes of newly detected asteroids in the Hubble Space Telescope (HST) archiv…