Search Publications
TDCOSMO. XIII. Cosmological distance measurements in light of the mass-sheet degeneracy: Forecasts from strong lensing and integral field unit stellar kinematics
Suyu, S. H.; Yıldırım, A.; Chen, G. C. -F. +1 more
Time-delay distance measurements of strongly lensed quasars have provided a powerful and independent probe of the current expansion rate of the Universe (H0). However, in light of the discrepancies between early- and late-time cosmological studies, current efforts revolve around the characterisation of systematic uncertainties in the me…
Dust attenuation law in JWST galaxies at z ∼ 7-8
Ferrara, A.; Pallottini, A.; Sommovigo, L. +5 more
Context. Understanding the wavelength dependence of dust attenuation is vital for inferring the properties of galaxies from their spectral energy distribution (SED) fitting. The dust attenuation curves in star-forming galaxies depend on the complex interplay between the intrinsic physical dust properties and dust-to-star geometry. Due to the lack …
First perihelion of EUI on the Solar Orbiter mission
Barczynski, K.; Peter, H.; Chitta, L. P. +35 more
Context. The Extreme Ultraviolet Imager (EUI) on board Solar Orbiter consists of three telescopes: the two High Resolution Imagers, in EUV (HRIEUV) and in Lyman-α (HRILya), and the Full Sun Imager (FSI). Solar Orbiter/EUI started its Nominal Mission Phase on 2021 November 27.
Aims: Our aim is to present the EUI images fr…
Nuclear high-ionisation outflow in the Compton-thick AGN NGC 6552 as seen by the JWST mid-infrared instrument
Colina, L.; Brandl, B. R.; Kavanagh, P. J. +17 more
Context. During the commissioning of the James Webb Space Telescope (JWST), the mid-infrared instrument (MIRI) observed NGC 6552 with the MIRI Imager and the Medium-Resolution Spectrograph (MRS). NGC 6552 is an active galactic nucleus (AGN) at a redshift of 0.0266 (DL = 120 Mpc) classified as a Seyfert 2 nucleus in the optical and Compt…
The two rings of (50000) Quaoar
Alcock, C.; Lehner, M. J.; Tatsumi, E. +66 more
Context. Quaoar is a classical trans-Neptunian object (TNO) with an area-equivalent diameter of 1100 km and an orbital semi-major axis of 43.3 astronomical units. Based on stellar occultations observed between 2018 and 2021, an inhomogeneous ring (Q1R, i.e., Quaoar's first ring) has been detected around this body.
Aims: A new stellar occultat…
Calibration of hybrid resolved star formation rate recipes based on PHANGS-MUSE Hα and Hβ maps
Leroy, Adam K.; Glover, Simon C. O.; Klessen, Ralf S. +17 more
Mapping star-formation rates (SFR) within galaxies is key to unveiling their assembly and evolution. Calibrations exist for computing the SFR from a combination of ultraviolet and infrared bands for galaxies as integrated systems, but their applicability to sub-galactic (kiloparsec) scales remains largely untested. We used integral field spectrosc…
Starlight-polarization-based tomography of the magnetized ISM: PASIPHAE's line-of-sight inversion method
Eriksen, H. K.; Ghosh, T.; Pearson, T. J. +20 more
We present the first Bayesian method for tomographic decomposition of the plane-of-sky orientation of the magnetic field with the use of stellar polarimetry and distance. This standalone tomographic inversion method presents an important step forward in reconstructing the magnetized interstellar medium (ISM) in three dimensions within dusty region…
Gaia Data Release 3. The Gaia Andromeda Photometric Survey
Audard, M.; Rimoldini, L.; Holl, B. +14 more
Context. As part of Gaia Data Release 3 (Gaia DR3), epoch photometry has been released for 1.2 million sources centred on M 31. This is a taster for Gaia Data Release 4 where all the epoch photometry will be released.
Aims: In this paper, the content of the Gaia Andromeda Photometric Survey (GAPS) is described, including statistics to assess …
The stellar halo in Local Group Hestia simulations. I. The in situ component and the effect of mergers
Vogelsberger, Mark; Steinmetz, Matthias; Grand, Robert J. J. +12 more
Theory suggests that mergers play an important role in shaping galactic discs and stellar haloes, which was observationally confirmed in the Milky Way (MW) thanks to Gaia data. In this work, aiming to probe the contribution of mergers to the in situ stellar halo formation, we analyse six M 31 and MW analogues from the HESTIA suite of cosmological …
V-LoTSS: The circularly polarised LOFAR Two-metre Sky Survey
White, G. J.; Bomans, D. J.; Ray, T. P. +44 more
We present the detection of 68 sources from the most sensitive radio survey in circular polarisation conducted to date. We used the second data release of the 144 MHz LOFAR Two-metre Sky Survey to produce circularly polarised maps with a median noise of 140 µJy beam−1 and resolution of 20″ for ≈27% of the northern sky (5634 deg2