Search Publications
Connecting X-ray nuclear winds with galaxy-scale ionised outflows in two z ∼ 1.5 lensed quasars
Marconi, A.; Vignali, C.; Comastri, A. +15 more
Aims: Outflows driven by active galactic nuclei (AGN) are expected to have a significant impact on host galaxy evolution, but the matter of how they are accelerated and propagated on galaxy-wide scales is still under debate. This work addresses these questions by studying the link between X-ray, nuclear ultra-fast outflows (UFOs), and extende…
Abundances of neutron-capture elements in thin- and thick-disc stars in the solar neighbourhood
Tautvaišienė, G.; Drazdauskas, A.; Mikolaitis, Š. +4 more
Aims: The aim of this work is to determine abundances of neutron-capture elements for thin- and thick-disc F, G, and K stars in several selected sky fields near the north ecliptic pole and to compare the results with the Galactic chemical evolution models, to explore elemental gradients according to stellar ages, mean galactocentric distances…
A large sub-Neptune transiting the thick-disk M4 V TOI-2406
Gabor, P.; Queloz, D.; Henning, T. +71 more
Context. Large sub-Neptunes are uncommon around the coolest stars in the Galaxy and are rarer still around those that are metal-poor. However, owing to the large planet-to-star radius ratio, these planets are highly suitable for atmospheric study via transmission spectroscopy in the infrared, such as with JWST.
Aims: Here we report the discov…
A high pitch angle structure in the Sagittarius Arm
Castro-Ginard, A.; Benjamin, R. A.; Krone-Martins, A. +6 more
Context. In spiral galaxies, star formation tends to trace features of the spiral pattern, including arms, spurs, feathers, and branches. However, in our own Milky Way, it has been challenging to connect individual star-forming regions to their larger Galactic environment owing to our perspective from within the disk. One feature in nearly all mod…
The role of AGN and obscuration in the position of the host galaxy relative to the main sequence
Shirley, R.; Ciesla, L.; Buat, V. +5 more
We use X-ray active galactic nuclei (AGN) observed by the Chandra X-ray Observatory within the 9.3 deg2 Boötes field of the NDWFS to study whether there is a correlation between X-ray luminosity (LX) and star formation rate (SFR) of the host galaxy, at 0.5 < z < 2.0, with respect to the position of the galaxy to the mai…
Constraining the AGN duty cycle in the cool-core cluster MS 0735.6+7421 with LOFAR data
Edge, Alastair C.; Bonafede, Annalisa; Brienza, Marisa +6 more
Context. MS 0735.6+7421 is a galaxy cluster that hosts a central radio galaxy with a very steep spectrum. The spectrum is produced by one of the most powerful known jetted active galactic nuclei (AGN). The radio plasma, ejected at nearly light speed from the central AGN, has displaced the intra-cluster medium, leaving two pairs of cavities observa…
A calibration of the Rossby number from asteroseismology
García, R. A.; Mathur, S.; Khalatyan, A. +4 more
Stellar activity and rotation are tightly related in a dynamo process. Our understanding of this mechanism is mainly limited by our capability of inferring the properties of stellar turbulent convection. In particular, the convective turnover time is a key ingredient through the estimation of the stellar Rossby number, which is the ratio of the ro…
Mass segregation and sequential star formation in NGC 2264 revealed by Herschel
Cunningham, N.; Lumsden, S. L.; Schneider, N. +16 more
Context. The mass segregation of stellar clusters could be primordial rather than dynamical. Despite the abundance of studies of mass segregation for stellar clusters, those for stellar progenitors are still scarce, so the question concerning the origin and evolution of mass segregation is still open.
Aims: Our goal is to characterize the str…
Close-up view of a luminous star-forming galaxy at z = 2.95
Berta, S.; Ivison, R. J.; Omont, A. +35 more
Exploiting the sensitivity of the IRAM NOrthern Extended Millimeter Array (NOEMA) and its ability to process large instantaneous bandwidths, we have studied the morphology and other properties of the molecular gas and dust in the star forming galaxy, H-ATLAS J131611.5+281219 (HerBS-89a), at z = 2.95. High angular resolution (0.″3) image…
Bottlenecks to interstellar sulfur chemistry. Sulfur-bearing hydrides in UV-illuminated gas and grains
Goicoechea, J. R.; Riquelme, D.; Fuente, A. +8 more
Hydride molecules lie at the base of interstellar chemistry, but the synthesis of sulfuretted hydrides is poorly understood and their abundances often crudely constrained. Motivated by new observations of the Orion Bar photodissociation region (PDR) - 1″ resolution ALMA images of SH+; IRAM 30 m detections of bright H232<…