Search Publications
The impact of stellar feedback from velocity-dependent ionized gas maps - a MUSE view of Haro 11
Östlin, G.; Hayes, M.; Adamo, A. +6 more
We have used the capability of the Multi-Unit Spectroscopic Explorer (MUSE) instrument to explore the impact of stellar feedback at large scales in Haro 11, a galaxy under extreme starburst condition and one of the first galaxies where Lyman continuum (LyC) has been detected. Using H α, [O III] λ5007, and [O I] λ6300 emission lines from deep MUSE …
NuSTAR and XMM-Newton broad-band spectrum of SAX J1808.4-3658 during its latest outburst in 2015
Sanna, A.; Papitto, A.; Di Salvo, T. +4 more
The first discovered accreting millisecond pulsar, SAX J1808.4-3658, went into X-ray outburst in 2015 April. We triggered a 100 ks XMM-Newton ToO, taken at the peak of the outburst, and a 55 ks NuSTAR ToO, performed 4 d apart. We report here the results of a detailed spectral analysis of both the XMM-Newton and NuSTAR spectra. While the XMM-Newton…
Faint end of the z ∼ 3-7 luminosity function of Lyman-alpha emitters behind lensing clusters observed with MUSE
Laporte, N.; Bauer, F. E.; Bina, D. +21 more
Contact. This paper presents the results obtained with the Multi-Unit Spectroscopic Explorer (MUSE) at the ESO Very Large Telescope on the faint end of the Lyman-alpha luminosity function (LF) based on deep observations of four lensing clusters. The goal of our project is to set strong constraints on the relative contribution of the Lyman-alpha em…
The Red Dead Redemption Survey of Circumgalactic Gas about Massive Galaxies. I. Mass and Metallicity of the Cool Phase
Bowen, David V.; Tejos, Nicolas; Lehner, Nicolas +6 more
We present a search for H I in the circumgalactic medium (CGM) of 21 massive (< {log}{M}\star > ∼ 11.4), luminous red galaxies (LRGs) at z ∼ 0.5. Using UV spectroscopy of QSO sightlines projected within 500 kpc (∼{R}vir}) of these galaxies, we detect H I absorption in 11/21 sightlines, including two partial Lyman limit …
Photochemistry of water in the martian thermosphere and its effect on hydrogen escape
Krasnopolsky, Vladimir A.
Recent SPICAM IR solar occultations reveal significant abundances of water vapor up to ≈80 km near Mars perihelion. These abundances are stimulated by dust that heats the atmosphere and precludes condensation of water. This phenomenon correlates with detections of high escape of hydrogen near perihelion using the H Lyman-alpha in the SPICAM UV and…
Multiple stellar populations in NGC 1866. New clues from Cepheids and colour-magnitude diagram
Girardi, Léo; Marigo, Paola; Goudfrooij, Paul +5 more
We performed a comprehensive study of the stellar populations in the young Large Magellanic Cloud cluster NGC 1866, combining the analysis of its best-studied Cepheids with that of a very accurate colour-magnitude diagram (CMD) obtained from the most recent Hubble Space Telescope photometry. We used a Bayesian method based on new PARSEC stellar ev…
Extreme Debris Disk Variability: Exploring the Diverse Outcomes of Large Asteroid Impacts During the Era of Terrestrial Planet Formation
Reichart, D. E.; Rujopakarn, W.; Dong, Ruobing +14 more
The most dramatic phases of terrestrial planet formation are thought to be oligarchic and chaotic growth, on timescales of up to 100-200 Myr, when violent impacts occur between large planetesimals of sizes up to protoplanets. Such events are marked by the production of large amounts of debris, as has been observed in some exceptionally bright and …
Speckle Interferometry at SOAR in 2018
Tokovinin, Andrei; Briceño, Cesar; Horch, Elliott P. +2 more
The results of speckle interferometric observations at the 4.1 m Southern Astrophysical Research Telescope (SOAR) in 2018 are given, totaling 3097 measurements of 2427 resolved pairs with separations from 11 mas to 5.″9 (median 0.″15, magnitude difference up to 7 mag) and nonresolutions of 624 targets. This work continues our long-term speckle pro…
A LOFAR-IRAS cross-match study: the far-infrared radio correlation and the 150 MHz luminosity as a star-formation rate tracer
Prandoni, I.; Wang, L.; Shimwell, T. W. +15 more
Aims: We aim to study the far-infrared radio correlation (FIRC) at 150 MHz in the local Universe (at a median redshift ⟨z⟩∼0.05) and improve the use of the rest-frame 150 MHz luminosity, L150, as a star-formation rate (SFR) tracer, which is unaffected by dust extinction.
Methods: We cross-match the 60 µm selected Revised…
Empirical Modeling of CME Evolution Constrained to ACE/SWICS Charge State Distributions
Landi, Enrico; Rivera, Yeimy J.; Lepri, Susan T. +1 more
It is generally accepted that coronal mass ejections (CMEs) undergo rapid heating as they are released from the Sun. However, to date, the heating mechanism remains an open question. To gain insight into the plasma heating, we derive the density, temperature, and velocity evolution of the 2005 January 9 interplanetary CME event from launch to ion …