Search Publications
Spectroscopic orbits of nearby stars
Tokovinin, A.; Sperauskas, J.; Deveikis, V.
Aims: We observed stars with variable radial velocities to determine their spectroscopic orbits.
Methods: Velocities are presented of 132 targets taken over a time span reaching 30 years. These were measured with the correlation radial velocity spectrometers (1917 velocities) and the new VUES echelle spectrograph (627 velocities), with a…
The MURALES survey. II. Presentation of MUSE observations of 20 3C low-z radio galaxies and first results
Marconi, A.; Capetti, A.; Gilli, R. +12 more
We present observations of a complete sub-sample of 20 radio galaxies from the Third Cambridge Catalog (3C) with redshift < 0.3 obtained from VLT/MUSE optical integral field spectrograph. These data have been obtained as part of the survey MURALES (a MUse RAdio Loud Emission line Snapshot survey) with the main goal of exploring the active galac…
Radiative and mechanical feedback into the molecular gas in the Large Magellanic Cloud. II. 30 Doradus
Lebouteiller, V.; Madden, S. C.; Galliano, F. +6 more
With an aim of probing the physical conditions and excitation mechanisms of warm molecular gas in individual star-forming regions, we performed Herschel SPIRE Fourier Transform Spectrometer (FTS) observations of 30 Doradus in the Large Magellanic Cloud. In our FTS observations, important far-infrared (FIR) cooling lines in the interstellar medium,…
Stronger Constraints on the Evolution of the M BH-{\sigma }_{* } Relation up to z ∼ 0.6
Canalizo, Gabriela; Sexton, Remington O.; Treister, Ezequiel +4 more
We revisit the possibility of redshift evolution in the M BH-σ * relation with a sample of 22 Seyfert 1 galaxies with black holes (BHs) in the mass range {10}6.3{--}{10}8.3 {M}⊙ and redshift range 0.03 < z < 0.57 with spectra obtained from spatially resolved Keck/Low-resolution Imaging …
Unbiased Cosmological Parameter Estimation from Emission-line Surveys with Interlopers
Schneider, Donald P.; Gebhardt, Karl; Ciardullo, Robin +11 more
The galaxy catalogs generated from low-resolution emission-line surveys often contain both foreground and background interlopers due to line misidentification, which can bias the cosmological parameter estimation. In this paper, we present a method for correcting the interloper bias by using the joint analysis of auto- and cross-power spectra of t…
Different Signatures of Chromospheric Evaporation in Two Solar Flares Observed with IRIS
Gan, W. Q.; Ding, M. D.; Li, H. +2 more
We present different signatures of chromospheric evaporation in two solar flares observed by the Interface Region Imaging Spectrograph (IRIS). In the B1.6 flare on 2016 December 6 (SOL2016-12-06T10:40), the transition region Si IV line and the chromospheric C II and Mg II lines show blueshifts with low velocities up to 20 km s-1 at the …
The Ion Composition of Saturn's Equatorial Ionosphere as Observed by Cassini
Kurth, W. S.; Wahlund, J. -E.; Waite, J. H. +5 more
The Cassini Orbiter made the first in situ measurements of the upper atmosphere and ionosphere of Saturn in 2017. The Ion and Neutral Mass Spectrometer (INMS) found molecular hydrogen and helium as well as minor species including water, methane, ammonia, and organics. INMS ion mode measurements of light ion species (H+, H2
A comprehensive study of NGC 2345, a young open cluster with a low metallicity
Castro, N.; Negueruela, I.; Tabernero, H. M. +3 more
Context. NGC 2345 is a young open cluster that hosts seven blue and red supergiants, low metallicity, and a high fraction of Be stars, which makes it a privileged laboratory to study stellar evolution.
Aims: We aim to improve the determination of the cluster parameters and study the Be phenomenon. Our objective is also to characterise the sev…
CWISEP J193518.59-154620.3: An Extremely Cold Brown Dwarf in the Solar Neighborhood Discovered with CatWISE
Teplitz, Harry I.; Schlegel, David J.; Mobasher, Bahram +17 more
We present the discovery of an extremely cold, nearby brown dwarf in the solar neighborhood, found in the CatWISE catalog. Photometric follow-up with Spitzer reveals that the object, CWISEP J193518.59-154620.3, has ch1-ch2 = 3.24 ± 0.31 mag, making it one of the reddest brown dwarfs known. Using the Spitzer photometry and the polynomial relations …
Local Bubble contribution to the 353-GHz dust polarized emission
Pelgrims, V.; Skalidis, R.
It has not been shown so far whether the diffuse Galactic polarized emission at frequencies relevant for cosmic microwave background (CMB) studies originates from nearby or more distant regions of our Galaxy. This questions previous attempts that have been made to constrain magnetic field models at local and large scales. The scope of this work is…