Search Publications
A photo-z cautionary tale: Redshift confirmation of COSBO-7 at z = 2.625
Koekemoer, Anton M.; Schinnerer, Eva; Gillman, Steven +21 more
Photometric redshifts are widely used in studies of dusty star-forming galaxies (DSFGs), but catastrophic photo-z failure can undermine all redshift-dependent results. Here we report the spectroscopic redshift confirmation of COSBO-7, a strongly lensed DSFG in the COSMOS-PRIMER field. Recently, a photometric redshift solution of z ≳ 7.0 was report…
Radio emission as a stellar activity indicator
Callingham, J. R.; Vedantham, H. K.; Günther, M. N. +1 more
Radio observations of stars trace the plasma conditions and magnetic field properties of stellar magnetospheres and coronae. Depending on the plasma conditions at the emitter site, radio emission in the metre- and decimetre-wave bands is generated via different mechanisms, such as gyrosynchrotron, electron cyclotron maser instability, and plasma r…
Composition and thermal properties of Ganymede's surface from JWST/NIRSpec and MIRI observations
Saur, J.; Fry, P. M.; Fletcher, L. N. +21 more
Context. We present the first spectroscopic observations of Ganymede by the James Webb Space Telescope undertaken in August 2022 as part of the proposal "ERS observations of the Jovian system as a demonstration of JWST's capabilities for Solar System science".
Aims: We aimed to investigate the composition and thermal properties of the surface…
A biconical ionised gas outflow and evidence of positive feedback in NGC 7172 uncovered by MIRI/JWST
Rouan, D.; Rigopoulou, D.; Gandhi, P. +35 more
We present observations of the type-2 Seyfert NGC 7172 obtained with the medium-resolution spectrometer (MRS) of the Mid-Infrared Instrument (MIRI) on board the James Webb Space Telescope (JWST). This galaxy hosts one of the lowest ionised gas mass outflow rates (Ṁout ∼ 0.005 M⊙ yr‑1) in a sample of six active gala…
J-PLUS: Toward a homogeneous photometric calibration using Gaia BP/RP low-resolution spectra
Hernández-Monteagudo, C.; Hernán-Caballero, A.; Carrasco, J. M. +21 more
Aims: We present the photometric calibration of the 12 optical passbands for the Javalambre Photometric Local Universe Survey (J-PLUS) third data release (DR3) comprising 1642 pointings of two square degrees each.
Methods: We selected nearly 1.5 million main sequence stars with a signal-to-noise ratio larger than ten in the 12 J-PLUS pas…
PDRs4All. VIII. Mid-infrared emission line inventory of the Orion Bar
Hartigan, Patrick; Zhang, Yong; Gordon, Karl D. +135 more
Context. Mid-infrared emission features are important probes of the properties of ionized gas and hot or warm molecular gas, which are difficult to probe at other wavelengths. The Orion Bar photodissociation region (PDR) is a bright, nearby, and frequently studied target containing large amounts of gas under these conditions. Under the "PDRs4All" …
A3COSMOS and A3GOODSS: Continuum source catalogues and multi-band number counts
Schinnerer, Eva; Liu, Daizhong; Béthermin, Matthieu +7 more
Context. Galaxy submillimetre number counts are a fundamental measurement in our understanding of galaxy evolution models. Most early measurements are obtained via single-dish telescopes with substantial source confusion, whereas recent interferometric observations are limited to small areas.
Aims: We used a large database of ALMA continuum o…
JWST reveals the rapid and strong day-side variability of 55 Cancri e
Fridlund, M.; Heng, K.; Persson, C. M. +16 more
Context. The nature of the close-in rocky planet 55 Cnce is puzzling, despite it having been observed extensively. Its optical and infrared occultation depths show temporal variability, in addition to a phase curve variability observed in the optical. Aims. We wish to explore the possibility that the variability originates from the planet being in…
The boring history of Gaia BH3 from isolated binary evolution
Trani, Alessandro A.; Iorio, Giuliano; Mapelli, Michela +15 more
Gaia BH3 is the first observed dormant black hole (BH) with a mass of ≈30 M⊙, and it represents the first confirmation that such massive BHs are associated with metal-poor stars. Here, we explore the isolated binary formation channel for Gaia BH3, focusing on the old and metal-poor stellar population of the Milky Way halo. We used the M…
CHEX-MATE: Characterization of the intra-cluster medium temperature distribution
Kim, J.; Pointecouteau, E.; Pratt, G. W. +23 more
Context. Galaxy clusters grow through the accretion of mass over cosmic time. Their observed properties are then shaped by how baryons distribute and energy is diffused. Thus, a better understanding of spatially resolved, projected thermodynamic properties of the intra-cluster medium (ICM) may provide a more consistent picture of how mass and ener…