Search Publications
Spectroscopy of the binary TNO Mors-Somnus with the JWST and its relationship to the cold classical and plutino subpopulations observed in the DiSCo-TNO project
Stansberry, J.; Cruikshank, D.; Emery, J. P. +16 more
Context. Trans-Neptunian objects (TNOs) are remnants of small icy bodies from planetary formation that orbit in the region beyond Neptune. Within the population of TNOs, Trans-Neptunian binaries (TNBs) provide a valuable opportunity to test the models of the formation and evolution of planetesimals in the trans-Neptunian region. Various theories h…
Gaia's brightest very metal-poor (VMP) stars. Metallicity catalogue of a thousand VMP stars from Gaia's radial velocity spectrometer spectra
Sestito, Federico; Martin, Nicolas F.; Fabbro, Sébastien +10 more
Context. Gaia DR3 has offered the scientific community a remarkable dataset of approximately one million spectra acquired with the radial velocity spectrometer (RVS) in the calcium II triplet region, which is well suited to identify very metal-poor (VMP) stars. However, over 40% of these spectra have no released parameters by Gaia's GSP-Spec pipel…
ALMA-IMF. XII. Point-process mapping of 15 massive protoclusters
Galván-Madrid, R.; Cunningham, N.; Csengeri, T. +29 more
Context. A crucial aspect in addressing the challenge of measuring the core mass function (CMF), that is pivotal for comprehending the origin of the initial mass function (IMF), lies in constraining the temperatures of the cores.
Aims: We aim to measure the luminosity, mass, column density and dust temperature of star-forming regions imaged b…
The accretion burst of the massive young stellar object G323.46−0.08
Matter, A.; Eislöffel, J.; Stecklum, B. +10 more
Context. Accretion bursts from low-mass young stellar objects (YSOs) have been known for many decades. In recent years, the first accretion bursts of massive YSOs (MYSOs) have been observed. These phases of intense protostellar growth are of particular importance for studying massive star formation. Bursts of MYSOs are accompanied by flares of Cla…
Massive black holes in nuclear star clusters. Investigation with SRG/eROSITA X-ray data
Merloni, A.; Zhang, Y.; Arcodia, R. +4 more
Context. Massive black holes (MBHs) are typically hosted in the centres of massive galaxies but they appear to become rarer in lower mass galaxies, where nuclear star clusters (NSCs) frequently appear instead. The transition region, where both an MBH and NSC can co-exist, has been poorly studied to date and only a few dozen galaxies are known to h…
Detection of decayless oscillations in solar transition region loops
Guo, Mingzhe; Gao, Yuhang; Van Doorsselaere, Tom +1 more
Context. Decayless kink oscillations have been frequently observed in coronal loops, serving as a valuable diagnostic tool for the coronal magnetic field. Such oscillations have never before been reported in low-lying loops of the transition region (TR).
Aims: The aim of this study is to detect decayless kink oscillations in TR loops for the …
Exploring the ultra-hot Jupiter WASP-178b. Constraints on atmospheric chemistry and dynamics from a joint retrieval of VLT/CRIRES+ and space photometric data
Nagel, E.; Czesla, S.; Nortmann, L. +14 more
Despite recent progress in the spectroscopic characterization of individual exoplanets, the atmospheres of key ultra-hot Jupiters (UHJs) still lack comprehensive investigations. These include WASP-178b, one of the most irradiated UHJs known to date. We observed the dayside emission signal of this planet with CRIRES+ in the spectral K ba…
Detection of pulsed X-ray emission from the isolated neutron star candidate eRASSU J131716.9-402647
Haberl, F.; Pires, A. M.; Schwope, A. D. +1 more
The X-ray source
High-resolution APEX/LAsMA 12CO and 13CO (3-2) observation of the G333 giant molecular cloud complex. II. Survival and gravitational collapse of dense gas structures under feedback
Menten, K. M.; Wyrowski, F.; Liu, T. +4 more
Context. Feedback from young massive stars has an important impact on the star formation potential of their parental molecular clouds.
Aims: We investigate the physical properties of gas structures under feedback in the G333 complex using data of the 13CO J = 3-2 line observed with the LAsMA heterodyne camera on the APEX telescope.…
HdC and EHe stars through the prism of Gaia DR3. 3D distribution and Gaia's chromatic PSF effects
Tisserand, P.; Crawford, C. L.; Clayton, G. C. +3 more
Context. Upon its release the Gaia DR3 catalogue has led to tremendous progress in multiple fields of astronomy by providing the complete astrometric solution for nearly 1.5 billion sources.
Aims: We analysed the photometric and astrometric results for Hydrogen-deficient Carbon (HdC), Extreme Helium (EHe), and DYPer type stars to identify any…