Search Publications
The VISCACHA survey. III. Star clusters counterpart of the Magellanic Bridge and Counter-Bridge in 8D
Geisler, D.; Bica, E.; Barbuy, B. +15 more
Context. The interactions between the Small and Large Magellanic Clouds (SMC and LMC) created the Magellanic Bridge; a stream of gas and stars pulled out of the SMC towards the LMC about 150 Myr ago. The tidal counterpart of this structure, which should include a trailing arm, has been predicted by models but no compelling observational evidence h…
Physics of ULIRGs with MUSE and ALMA: The PUMA project. I. Properties of the survey and first MUSE data results
Maiolino, R.; Colina, L.; Perna, M. +8 more
Context. Ultraluminous infrared galaxies (ULIRGs) are characterised by extreme starburst (SB) and active galactic nucleus (AGN) activity, and are therefore ideal laboratories for studying the outflow phenomena and their feedback effects. We have recently started a project called Physics of ULIRGs with MUSE and ALMA (PUMA), which is a survey of 25 …
SLITRONOMY: Towards a fully wavelet-based strong lensing inversion technique
Starck, J. -L.; Courbin, F.; Joseph, R. +2 more
Strong gravitational lensing provides a wealth of astrophysical information on the baryonic and dark matter content of galaxies. It also serves as a valuable cosmological probe by allowing us to measure the Hubble constant independently of other methods. These applications all require the difficult task of inverting the lens equation and simultane…
Location and energetics of the ultra-fast outflow in PG 1448+273
Piconcelli, E.; Tombesi, F.; Middei, R. +3 more
Context. Ultra-fast outflows (UFOs) are the most powerful disk-driven winds in active galactic nuclei (AGNs). Theoretical and observational evidence shows that UFOs play a key role in the AGN feedback mechanism. The mechanical power of the strongest UFOs may be enough to propagate the feedback to the host galaxies and ultimately shape the AGN-gala…
X-ray-induced chemistry of water and related molecules in low-mass protostellar envelopes
Walsh, Catherine; Bosman, Arthur D.; Nomura, Hideko +2 more
Context. Water is a key molecule in star- and planet-forming regions. Recent water line observations toward several low-mass protostars suggest low water gas fractional abundances (<10−6 with respect to total hydrogen density) in the inner warm envelopes (r < 102 au). Water destruction by X-rays is thought to influence …
APOGEE discovery of a chemically atypical star disrupted from NGC 6723 and captured by the Milky Way bulge
Piatti, Andrés E.; Beers, Timothy C.; Placco, Vinicius M. +26 more
The central (`bulge') region of the Milky Way is teeming with a significant fraction of mildly metal-deficient stars with atmospheres that are strongly enriched in cyanogen (12C14N). Some of these objects, which are also known as nitrogen-enhanced stars, are hypothesised to be relics of the ancient assembly history of the Mil…
The first simultaneous X-ray broadband view of Mrk 110 with XMM-Newton and NuSTAR
Grosso, N.; Porquet, D.; Reeves, J. N. +2 more
Context. Soft and hard X-ray excesses, compared to the continuum power-law shape between ∼2−10 keV, are common features observed in the spectra of active galactic nuclei (AGN) and are associated with the accretion disc-corona system around the supermassive black hole. However, the dominant process at work is still highly debated and has been propo…
Solar Orbiter's first Venus flyby: Observations from the Radio and Plasma Wave instrument
Maksimovic, M.; Bale, S. D.; Chust, T. +41 more
Context. On December 27, 2020, Solar Orbiter completed its first gravity assist manoeuvre of Venus (VGAM1). While this flyby was performed to provide the spacecraft with sufficient velocity to get closer to the Sun and observe its poles from progressively higher inclinations, the Radio and Plasma Wave (RPW) consortium, along with other operational…
Recovery and analysis of rest-frame UV emission lines in 2052 galaxies observed with MUSE at 1.5 < z < 6.4
Feltre, A.; Kollatschny, W.; Mahler, G. +17 more
Rest-frame ultraviolet (UV) emission lines probe electron densities, gas-phase abundances, metallicities, and ionization parameters of the emitting star-forming galaxies and their environments. The strongest main UV emission line, Lyα, has been instrumental in advancing the general knowledge of galaxy formation in the early universe. However, obse…
SUPER. V. ALMA continuum observations of z ∼ 2 AGN and the elusive evidence of outflows influencing star formation
Alexander, D. M.; Fiore, F.; Marconi, A. +24 more
We study the impact of active galactic nuclei (AGN) ionised outflows on star formation in high-redshift AGN host galaxies, by combining near-infrared integral field spectroscopic (IFS) observations, mapping the Hα emission and [O III]λ5007 outflows, with matched-resolution observations of the rest-frame far-infrared (FIR) emission. We present high…