Search Publications
Predicting HCN, HCO+, multi-transition CO, and dust emission of star-forming galaxies. Constraining the properties of resolved gas and dust disks of local spiral galaxies
Braine, J.; Bigiel, F.; Gratier, P. +2 more
The interstellar medium is a turbulent, multiphase, and multi-scale medium that follows scaling relations that link the surface density, volume density, and velocity dispersion with the cloud size. Galactic clouds range from below 1 pc to about 100 pc in size. Extragalactic clouds appear to follow the same range, although they are only now becomin…
Existence of tidal tails for the globular cluster NGC 5824
Zhao, Gang; Zhao, Jing-Kun; Ishigaki, Miho N. +5 more
Context. Several dynamically cold streams have been associated with certain globular clusters (GCs) based on orbital energies and angular momenta. Some of these streams are surprisingly far apart from their progenitors and one such pair is Triangulum and NGC 5824. Triangulum can be considered as a piece of the leading tail of NGC 5824 since the cl…
The uncertain interstellar medium of high-redshift quiescent galaxies: Impact of methodology
Daddi, E.; Gobat, R.; Caminha, G. B. +3 more
How much gas and dust is contained in high-redshift quiescent galaxies (QGs) is currently an open question with relatively few and contradictory answers, as well as important implications for our understanding of the nature of star formation quenching processes at cosmic noon. Here we revisit far-infrared (FIR) observations of the REQUIEM-ALMA sam…
SDSS-IV MaStar: Stellar parameter determination with continuum-supplemented full-spectrum fitting
Bizyaev, Dmitry; Beers, Timothy C.; Holtzman, Jon A. +13 more
Aims: We present a stellar parameter catalog built to accompany the MaStar Stellar Library, which is a comprehensive collection of empirical, medium-resolution stellar spectra.
Methods: We constructed this parameter catalog by using a multicomponent χ2 fitting approach to match MaStar spectra to models generated by interpolati…
Analysis of the public HARPS/ESO spectroscopic archive. Jupiter-like planets around HD103891 and HD105779
Mazeh, T.; Zucker, S.; Tal-Or, L. +3 more
Aims: We use the recently published database of radial velocities (RVs) that were derived from fifteen years of HARPS/ESO observations to search for planet candidates.
Methods: For targets with sufficient RV data, we applied an automated algorithm to identify significant periodic signals and fit a Keplerian model for orbital estimates. W…
Radial distribution of plasma at comet 67P. Implications for cometary flyby missions
Henri, P.; Edberg, N. J. T.; Vigren, E. +3 more
Context. The Rosetta spacecraft followed comet 67P/Churyumov-Gerasimenko (67P) for more than two years at a slow walking pace (~1 m s−1) within 1500 km from the nucleus. During one of the radial movements of the spacecraft in the early phase of the mission, the radial distribution of the plasma density could be estimated, and the ionosp…
Losing a minute every two years: SRG X-ray view of the rapidly accelerating X-ray pulsar SXP 1323
Tsygankov, S. S.; Lutovinov, A. A.; Mereminskiy, I. A. +4 more
The source SXP 1323 is a peculiar high-mass X-ray binary located in the Small Magellanic Cloud. It is renowned for its rapid spin-up. We investigate for the first time broadband X-ray properties of SXP 1323 as observed by the Mikhail Pavlinsky ART-XC and eROSITA telescopes on board the Spectrum-Roentgen-Gamma observatory. Using ART-XC and eROSITA …
The strange case of Na I in the atmosphere of HD 209458 b. Reconciling low- and high-resolution spectroscopic observations
Pallé, E.; Casasayas-Barris, N.; Micela, G. +3 more
Aims: We aim to investigate the origin of the discrepant results reported in the literature about the presence of Na I in the atmosphere of HD 209458 b, based on low- and high-resolution transmission spectroscopy.
Methods: We generated synthetic planetary atmosphere models and we compared them with the transmission light curves and spect…
The resolved jet of 3C 273 at 150 MHz. Sub-arcsecond imaging with the LOFAR international baselines
Quinn, J.; Morabito, L. K.; Sweijen, F. +6 more
Context. Since its discovery in 1963, 3C 273 has become one of the most widely studied quasars with investigations spanning the electromagnetic spectrum. While much has therefore been discovered about this historically notable source, its low-frequency emission is far less well understood. Observations in the megahertz (MHz) regime have traditiona…
Towards a fully consistent Milky Way disk model. V. The disk model for 4-14 kpc
Just, A.; Sysoliatina, K.
Context. The semi-analytic Just-Jahreiß (JJ) model of the Galactic disk is a flexible tool for stellar population synthesis with a fine age resolution of 25 Myr. The model has recently been calibrated in the solar neighbourhood against the Gaia DR2 stars. We have identified two star-formation bursts within the last ∼4 Gyr of the local star-formati…