Search Publications
TOPoS. VI. The metal-weak tail of the metallicity distribution functions of the Milky Way and the Gaia-Sausage-Enceladus structure
Ludwig, H. -G.; Salvadori, S.; Bonifacio, P. +11 more
Context. The goal of the Turn-Off Primordial Stars survey (TOPoS) project is to find and analyse turn-off (TO) stars of extremely low metallicity. To select the targets for spectroscopic follow-up at high spectral resolution, we relied on low-resolution spectra from the Sloan Digital Sky Survey (SDSS).
Aims: In this paper, we use the metallic…
Second Data Release of the All-sky NOIRLab Source Catalog
Nidever, David L.; Dey, Arjun; Fasbender, Katie +7 more
We announce the second data release (DR2) of the NOIRLab Source Catalog (NSC), using 412,116 public images from CTIO-4 m+DECam, the KPNO-4 m+Mosaic3, and the Bok-2.3 m+90Prime. NSC DR2 contains over 3.9 billion unique objects, 68 billion individual source measurements, covers ≈35,000 square degrees of the sky, has depths of ≈23 mag in most broadba…
The interstellar medium of quiescent galaxies and its evolution with time
Daddi, Emanuele; Whitaker, Katherine E.; Toft, Sune +6 more
We characterise the basic far-IR properties and the gas mass fraction of massive (⟨log(M*/M⊙)⟩ ≈ 11.0) quiescent galaxies (QGs) and explore how these evolve from z = 2.0 to the present day. We use robust, multi-wavelength (mid- to far-IR and sub-millimetre to radio) stacking ensembles of homogeneously selected and mass comple…
Cepheid metallicity in the Leavitt law (C-metall) survey - I. HARPS-N@TNG spectroscopy of 47 classical Cepheids and 1 BL Her variables
Clementini, G.; Ripepi, V.; Molinaro, R. +11 more
Classical Cepheids (DCEPs) are the most important primary indicators of the extragalactic distance scale. Establishing the dependence on metallicity of their period-luminosity and period-Wesenheit (PLZ/PWZ) relations has deep consequences on the calibration of secondary distance indicators that lead to the final estimate of the Hubble constant (H<…
The young massive SMC cluster NGC 330 seen by MUSE. II. Multiplicity properties of the massive-star population
Wang, C.; de Mink, S. E.; de Koter, A. +10 more
Context. Observations of massive stars in open clusters younger than ∼8 Myr have shown that a majority of them are in binary systems, most of which will interact during their life. While these can be used as a proxy of the initial multiplicity properties, studying populations of massive stars older than ∼20 Myr allows us to probe the outcome of th…
Evolution of Switchbacks in the Inner Heliosphere
Velli, Marco; Matteini, Lorenzo; Sioulas, Nikos +3 more
We analyze magnetic field data from the first six encounters of Parker Solar Probe, three Helios fast streams and two Ulysses south polar passes covering heliocentric distances 0.1 ≲ R ≲ 3 au. We use this data set to statistically determine the evolution of switchbacks of different periods and amplitudes with distance from the Sun. We compare the …
Characterizing Undetected Stellar Companions with Combined Data Sets
Kraus, Adam L.; Mann, Andrew W.; Wood, Mackenna L.
Binaries play a critical role in the formation, evolution, and fundamental properties of planets, stars, and stellar associations. Observational studies in these areas often include a mix of observations aimed at detecting or ruling out the presence of stellar companions. Rarely can nondetections rule out all possible binary configurations. Here w…
KMOS study of the mass accretion rate from Class I to Class II in NGC 1333
Fiorellino, Eleonora; Giannini, Teresa; Nisini, Brunella +6 more
Context. The mass accretion rate (\Mdot;acc) is the fundamental parameter to understand the process of mass assembly that results in the formation of a low-mass star. This parameter has been largely studied in Classical T Tauri stars in star-forming regions with ages of ∼1 − 10 Myr. However, little is known about the accretion propertie…
Powerful winds in high-redshift obscured and red quasars
Hamann, Fred; Veilleux, Sylvain; Zakamska, Nadia L. +10 more
Quasar-driven outflows must have made their most significant impact on galaxy formation during the epoch when massive galaxies were forming most rapidly. To study the impact of quasar feedback, we conducted rest-frame optical integral field spectrograph (IFS) observations of three extremely red quasars (ERQs) and one type-2 quasar at z = 2-3, obta…
Water heavily fractionated as it ascends on Mars as revealed by ExoMars/NOMAD
Vandaele, Ann Carine; Aoki, Shohei; Liuzzi, Giuliano +15 more