Search Publications
Compact molecular gas emission in local LIRGs among low- and high-z galaxies
Rigopoulou, D.; Colina, L.; Valentino, F. +12 more
We present new CO(2-1) observations of a representative sample of 24 local (z < 0.02) luminous infrared galaxies (LIRGs) at high spatial resolution (< 100 pc) from the Atacama Large Millimeter/submillimeter Array (ALMA). Our LIRGs lie above the main sequence (MS), with typical stellar masses in the range 1010-1011 M
The Milky Way's middle-aged inner ring
Clarke, Jonathan P.; Wylie, Shola M.; Gerhard, Ortwin E.
Aims: We investigate the metallicity, age, and orbital anatomy of the inner Milky Way, specifically focussing on the outer bar region.
Methods: We integrated a sample of APOGEE DR16 inner Galaxy stars in a state of the art bar-bulge potential with a slow pattern speed and investigated the link between the resulting orbits and their [Fe/H…
The Solar ALMA Science Archive (SALSA). First release, SALAT, and FITS header standard
Mohan, Atul; Wedemeyer, Sven; Jafarzadeh, Shahin +5 more
In December 2016, the Atacama Large Millimeter/submillimeter Array (ALMA) carried out the first regular observations of the Sun. These early observations and the reduction of the respective data posed a challenge due to the novelty and complexity of observing the Sun with ALMA. The difficulties with producing science-ready, time-resolved imaging p…
Relationship between Ca and Hα chromospheric emission in F-G-K stars: Indication of stellar filaments?
Kretzschmar, M.; Meunier, N.; Delfosse, X. +2 more
Context. Different relationships between the Hα and Ca II chromospheric emissions have been reported in solar-type stars. In particular, the time-series of emissions in these two lines are clearly anti-correlated for a few percent of the stars, contrary to what is observed on the Sun.
Aims: Our objective is to characterise these relationships…
The eROSITA Final Equatorial-Depth Survey (eFEDS). Variability catalogue and multi-epoch comparison
Schmitt, J. H. M. M.; Georgakakis, A.; Salvato, M. +10 more
The 140-square-degrees Final Equatorial-Depth Survey (eFEDS) field, observed with the extended ROentgen Survey with an Imaging Telescope Array (eROSITA) on board the Spectrum-Roentgen-Gamma mission, provides a first look at the variable eROSITA sky. We analysed the intrinsic X-ray variability of the eFEDS sources and provide X-ray light curves and…
Bulge formation inside quiescent lopsided stellar disks: Connecting accretion, star formation, and morphological transformation in a z ∼ 3 galaxy group
Daddi, Emanuele; Pety, Jérôme; Tan, Qinghua +10 more
We present well-resolved near-IR and submillimeter analysis of the three highly star-forming massive (> 1011 M⊙) galaxies within the core of the RO-1001 galaxy group at z = 2.91. Each of them displays kpc scale compact starbursting cores with properties consistent with forming galaxy bulges, embedded at the center of exten…
A census of OBe stars in nearby metal-poor dwarf galaxies reveals a high fraction of extreme rotators
Lennon, D. J.; Schootemeijer, A.; Langer, N. +3 more
The early Universe, together with many nearby dwarf galaxies, is deficient in heavy elements. The evolution of massive stars in such environments is thought to be affected by rotation. Extreme rotators among them tend to form decretion disks and manifest themselves as OBe stars. We use a combination of UB, Gaia, Spitzer, and Hubble Space Telescope…
The eccentric millisecond pulsar, PSR J0955−6150. I. Pulse profile analysis, mass measurements, and constraints on binary evolution
Camilo, F.; Possenti, A.; Kramer, M. +17 more
Context. PSR J0955−6150 is a member of an enigmatic class of eccentric millisecond pulsar (MSP) and helium white dwarf (He WD) systems (eMSPs), whose binary evolution is poorly understood and believed to be strikingly different to that of traditional MSP+He WD systems in circular orbits.
Aims: Measuring the masses of the stars in this system …
Single-lens mass measurement in the high-magnification microlensing event Gaia19bld located in the Galactic disc
Harrison, D. L.; Bryden, G.; Soszyński, I. +66 more
Context. Microlensing provides a unique opportunity to detect non-luminous objects. In the rare cases that the Einstein radius θE and microlensing parallax πE can be measured, it is possible to determine the mass of the lens. With technological advances in both ground- and space-based observatories, astrometric and interferom…
Multiply eclipsing candidates from the TESS satellite
Mašek, M.; Zasche, P.; Henzl, Z.
We present a catalogue of the Transiting Exoplanet Survey Satellite (TESS) targets that show multiple eclipses. In all of these stars, we detected two sets of eclipses, for which their two distinctive periods can be derived. These multiple stellar systems could either be doubly eclipsing quadruples or triple-star coplanar systems showing eclipses …