Search Publications
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
Near-IR and optical radial velocities of the active M dwarf star Gl 388 (AD Leo) with SPIRou at CFHT and SOPHIE at OHP. A 2.23 day rotation period and no evidence for a corotating planet
Bouchy, F.; Deleuil, M.; Moutou, C. +36 more
Context. The search for extrasolar planets around the nearest M dwarfs is a crucial step toward identifying the nearest Earth-like planets. One of the main challenges in this search is that M dwarfs can be magnetically active and stellar activity can produce radial velocity (RV) signals that could mimic those of a planet.
Aims: We aim to inve…
Quantifying the energetics of molecular superbubbles in PHANGS galaxies
Boquien, M.; Chevance, M.; Dale, D. A. +26 more
Context. Star formation and stellar feedback are interlinked processes that redistribute energy, turbulence, and material throughout galaxies. Because young and massive stars form in spatially clustered environments, they create pockets of expanding gas termed superbubbles, which retain information about the physical processes that drive them. As …
Cannibals in the thick disk. II. Radial-velocity monitoring of the young α-rich stars
Jorissen, A.; Jofré, P.; Tayar, J. +6 more
Context. Determining ages of stars for reconstructing the history of the Milky Way remains one of the most difficult tasks in astrophysics. This involves knowing when it is possible to relate the stellar mass with its age and when it is not. The young α-rich (YAR) stars present such a case in which we are still not sure about their ages because th…
The CARMENES search for exoplanets around M dwarfs. Wolf 1069 b: Earth-mass planet in the habitable zone of a nearby, very low-mass star
Nagel, E.; Amado, P. J.; Caballero, J. A. +47 more
We present the discovery of an Earth-mass planet (Mb sin i = 1.26 ± 0.21 M⊕) on a 15.6 d orbit of a relatively nearby (d ~ 9.6 pc) and low-mass (0.167 ± 0.011 M⊙) M5.0 V star, Wolf 1069. Sitting at a separation of 0.0672 ± 0.0014 au away from the host star puts Wolf 1069 b in the habitable zone (HZ), receiving an i…
Clustering of red sequence galaxies in the fourth data release of the Kilo-Degree Survey
Hoekstra, Henk; Heymans, Catherine; Kuijken, Konrad +13 more
We present a sample of luminous red sequence galaxies as the basis for a study of the large-scale structure in the fourth data release of the Kilo-Degree Survey. The selected galaxies are defined by a red sequence template, in the form of a data-driven model of the colour-magnitude relation conditioned on redshift. In this work, the red sequence t…