Search Publications
JWST reveals a high fraction of disk breaks at 1 ≤ z ≤ 3
Xu, Dewang; Yu, Si-Yue
We analyzed the deconvolved surface brightness profiles of 247 massive and angularly large disk galaxies at 1 ≤ z ≤ 3 to study high-redshift disk breaks, using F356W-band images from the Cosmic Evolution Early Release Science survey (CEERS). We found that 12.6% of these galaxies exhibit type I (exponential) profiles, 56.7% exhibit type II (down-be…
Transitions in magnetic behavior at the substellar boundary
Stelzer, B.; Raetz, St.; Magaudda, E. +3 more
We aim to advance our understanding of magnetic activity and the underlying dynamo mechanism at the end of the main sequence. To this end, we have embarked on collecting simultaneous X-ray and radio observations for a sample of M7..L0 dwarfs in the solar neighborhood using XMM-Newton jointly with the Jansky Very Large Array (JVLA) and the Australi…
Gaia/GSP-spec spectroscopic properties of γ Doradus pulsators
Recio-Blanco, A.; de Laverny, P.; Aerts, C. +1 more
Context. The third Data Release of the ESA Gaia mission has provided a large sample of new gravity-mode pulsators, among which more than 11 600 are γ Dor stars. Aims. The goal of the present work is to present the spectroscopic parameters of these γ Dor pulsators estimated by the GSP-Spec module that analysed millions of Gaia spectra. Such a param…
Radial and azimuthal gradients of the moving groups in Gaia DR3: The slow and fast bar degeneracy problem
Antoja, T.; Bernet, M.; Monari, G. +2 more
Context. The structure and dynamics of the central bar of the Milky Way (MW) are still under debate whilst being fundamental ingredients for the evolution of our Galaxy. The recent Gaia DR3 offers an unprecedented detailed view of the 6D phase space of the MW, allowing for a better understanding of the complex imprints of the bar on the phase spac…
Magnetograms underestimate even unipolar magnetic flux nearly everywhere on the solar disk
Solanki, S. K.; Hirzberger, J.; Sinjan, J. +2 more
Context. The amount of magnetic flux passing through the solar surface is an important parameter determining solar activity and the heliospheric magnetic field. It is usually determined from line-of-sight magnetograms. Aims. We aim to test the reliability of determining the line-of-sight magnetic field from 3D MHD (magnetohydrodynamic) simulations…
The powerful lens galaxy cluster PLCK G287.0+32.9 (θE ∼ 43″). Redshift catalog and new lens model using MUSE observations
Grillo, C.; Tozzi, P.; Rosati, P. +17 more
Aims: We present a new high-precision strong-lensing model of PLCK G287.0+32.9, a massive lens galaxy cluster at z = 0.383, with the aim of obtaining an accurate estimation of its effective Einstein radius and total mass distribution. We also present a spectroscopic catalog containing accurate redshift measurements for close to 500 objects up…
Skipping a beat: Discovery of persistent quasi-periodic oscillations associated with pulsed fraction drop of the spin signal in M51 ULX-7
Wolter, Anna; Pintore, Fabio; Esposito, Paolo +24 more
Context. The discovery of pulsations in (at least) six ultraluminous X-ray sources (ULXs) has shown that neutron stars can accrete at (highly) super-Eddington rates, challenging the standard accretion theories. M51 ULX-7, with a spin signal of P ≃ 2.8 s, is the pulsating ULX (PULX) with the shortest known orbital period (Porb ≃ 2 d) and…
Exploring Galactic open clusters with Gaia: I. An examination in the first kiloparsec
Vieira, Katherine; García-Varela, Alejandro; Alfonso, Jeison
Context. Since the first publication of the Gαία catalogue, a new view of our Galaxy has arrived. Its astrometric and photometric information has improved the precision of the physical parameters of open star clusters obtained from them. Aims. Using the Gaia Data Release 3 (DR3) catalogue, our aim was to find physical stellar members including fai…
Precise characterisation of HD 15337 with CHEOPS: A laboratory for planet formation and evolution
Guterman, P.; Alonso, R.; Deleuil, M. +90 more
Context. The HD 15337 (TIC 120896927, TOI-402) system was observed by the Transiting Exoplanet Survey Satellite (TESS), revealing the presence of two short-period planets situated on opposite sides of the radius gap. This offers an excellent opportunity to study theories of formation and evolution, as well as to investigate internal composition an…
Stellar angular momentum of intermediate-redshift galaxies in MUSE surveys
Krajnović, D.; Contini, T.; Pessa, I. +8 more
We quantify the stellar rotation of galaxies by computing the λR parameter, a proxy for the stellar angular momentum in a sample of 106 intermediate-redshift galaxies (0.1 < z < 0.8). The sample is located in the CANDELS/GOODS-S and CANDELS/COSMOS regions, and it was observed by various MUSE surveys. We created spatially resolved …