Search Publications
Gravity or turbulence V: star-forming regions undergoing violent relaxation
Aguilar, Luis; Ballesteros-Paredes, Javier; Bonilla-Barroso, Andrea +6 more
Using numerical simulations of the formation and evolution of stellar clusters within molecular clouds (MCs), we show that the stars in clusters formed within collapsing MC clumps exhibit a constant velocity dispersion regardless of their mass, as expected in violent relaxation processes. In contrast, clusters formed in turbulence-dominated enviro…
A new photometric study of M14 (NGC 6402): an interpretation of the horizontal branch and beyond
Arellano Ferro, A.; Muneer, S.; Schröder, K. -P. +3 more
We present a CCD VI photometric study of the globular cluster M14. Particular attention is given to the variable stars. This allowed new classifications and cluster membership considerations. New variables are reported: 3 RRc, 18 SR, and 1 SX Phe. The Fourier decomposition of RR Lyrae light curves lead to the mean cluster metallicity of [Fe/H]
Sub-stellar companions of intermediate-mass stars with CoRoT: CoRoT-34b, CoRoT-35b, and CoRoT-36b
Alonso, R.; Bouchy, F.; Deleuil, M. +18 more
Theories of planet formation give contradicting results of how frequent close-in giant planets of intermediate mass stars (IMSs; $1.3\le M_{\star }\le 3.2\, \mathrm{M}_{\odot }$) are. Some theories predict a high rate of IMSs with close-in gas giants, while others predict a very low rate. Thus, determining the frequency of close-in giant planets o…
Outflows and spectral evolution in the eclipsing AMXP SWIFT J1749.4-2807 with NICER, XMM-Newton, and NuSTAR
Altamirano, D.; Albayati, A. C.; Sanna, A. +18 more
The neutron star low-mass X-ray binary SWIFT J1749.4-2807 is the only known eclipsing accreting millisecond X-ray pulsar. In this manuscript, we perform a spectral characterization of the system throughout its 2021, 2-week-long outburst, analysing 11 NICER observations and quasi-simultaneous XMM-Newton and NuSTAR single observations at the outburs…
Characterizing the PAH emission in the Orion Bar
Tielens, A. G. G. M.; Peeters, E.; Vacca, W. D. +1 more
We present 5-14 $\mu$m spectra at two different positions across the Orion Bar photodissociation region (PDR) obtained with the Infrared Spectrograph onboard the Spitzer Space Telescope and 3.3 $\mu$m PAH observations obtained with the Stratospheric Observatory for Infrared Astronomy (SOFIA). We aim to characterize emission from Polycyclic Aromati…
Astro-photometric study of M37 with Gaia and wide-field ugi-imaging
Salaris, M.; Anderson, J.; Rosati, P. +15 more
We present an astrometric and photometric wide-field study of the Galactic open star cluster M37 (NGC 2099). The studied field was observed with ground-based images covering a region of about four square degrees in the Sloan-like filters ugi. We exploited the Gaia catalogue to calibrate the geometric distortion of the large field mosaics, developi…
The GOGREEN survey: constraining the satellite quenching time-scale in massive clusters at z ≳ 1
Cooper, M. C.; Muzzin, Adam; Vulcani, Benedetta +15 more
We model satellite quenching at z ~ 1 by combining 14 massive (1013.8 < Mhalo/M⊙ < 1015) clusters at 0.8 < z < 1.3 from the GOGREEN and GCLASS surveys with accretion histories of 56 redshift-matched analogues from the IllustrisTNG simulation. Our fiducial model, which is parametrized by the s…
On the simultaneous modelling of dust and stellar populations for interpretation of galaxy properties
Stanway, Elizabeth R.; Carnall, Adam C.; Jones, Gareth T.
The physical properties of galaxies are encoded within their spectral energy distribution and require comparison with models to be extracted. These models must contain a synthetic stellar population and, where infrared data are to be used, also consider prescriptions for energy reprocessing and re-emission by dust. While many such models have been…
Radio monitoring of transient Be/X-ray binaries and the inflow-outflow coupling of strongly magnetized accreting neutron stars
Degenaar, N.; Wijnands, R.; Miller-Jones, J. C. A. +5 more
Strongly magnetized (B ≥ 1012 G) accreting neutron stars (NSs) are prime targets for studying the launching of jets by objects with a solid surface; while classical jet-launching models predict that such NSs cannot launch jets, recent observations and models argue otherwise. Transient Be/X-ray binaries (BeXRBs) are critical laboratories…
The ALPINE-ALMA [C II] survey: Investigation of 10 galaxies at z 4.5 with [O II] and [C II] line emission - ISM properties and [O II]-SFR relation
Schaerer, D.; Béthermin, M.; Boquien, M. +23 more
We present 10 main-sequence ALPINE galaxies (log (M/M⊙) = 9.2-11.1 and ${\rm SFR}=23-190\, {\rm M_{\odot }\, yr^{-1}}$) at z ~ 4.5 with optical [O II] measurements from Keck/MOSFIRE spectroscopy and Subaru/MOIRCS narrow-band imaging. This is the largest such multiwavelength sample at these redshifts, combining various measurements in th…