Search Publications
Excitation and acceleration of molecular outflows in LIRGs: The extended ESO 320-G030 outflow on 200-pc scales
Rigopoulou, D.; Colina, L.; Arribas, S. +7 more
We used high-spatial resolution (70 pc; 0 {{\overset{\prime\prime}{.}}} 3) CO multi-transition (J = 1-0, 2-1, 4-3, and 6-5) ALMA data to study the physical conditions and kinematics of the cold molecular outflow in the local luminous infrared galaxy (LIRG) ESO 320-G030 (d = 48 Mpc, LIR/L⊙ = 1011.3). ESO 320-G030 is…
Asteroseismology of two Kepler detached eclipsing binaries
Liakos, A.
The present work contains light curve, spectroscopic, and asteroseismic analyses for KIC 04851217 and KIC 10686876. These systems are detached eclipsing binaries hosting a pulsating component of δ Scuti type and have been observed with the unprecedented accuracy of the Kepler space telescope. Using ground-based spectroscopic observations, the spec…
Extending the view of ArH+ chemistry in diffuse clouds
Wyrowski, Friedrich; Menten, Karl M.; Jacob, Arshia M. +2 more
Context. One of the surprises of the Herschel mission was the detection of ArH+ towards the Crab Nebula in emission and in absorption towards strong Galactic background sources. Although these detections were limited to the first quadrant of the Galaxy, the existing data suggest that ArH+ ubiquitously and exclusively probes t…
Distance, magnetic field, and kinematics of the filamentary cloud LDN 1157
Tej, Anandmayee; Soam, Archana; Kim, Shinyoung +7 more
Context. LDN 1157 is one of several clouds that are situated in the cloud complex LDN 1147/1158. The cloud presents a coma-shaped morphology with a well-collimated bipolar outflow emanating from a Class 0 protostar, LDN 1157-mm, that resides deep inside the cloud.
Aims: The main goals of this work are (a) mapping the intercloud magnetic field…
The cosmic-ray content of the Orion-Eridanus superbubble
Casandjian, J. M.; Grenier, I. A.; Schlickeiser, R. +2 more
Aims: The nearby Orion-Eridanus superbubble, which was blown by multiple supernovae several million years ago, has likely produced cosmic rays. Its turbulent medium is still energised by massive stellar winds and it can impact cosmic-ray transport locally. The γ radiation produced in interactions between cosmic rays and interstellar gas can b…
Identification of 3XMM J000511.8+634018 as a new polar at Porb = 133.5 min - is it inside or outside the period gap?
Webb, N. A.; Guillot, S.; Schwope, A. D. +2 more
Aims: We aimed to identify the variable X-ray source 3XMM J000511.8+634018, which was serendipitously discovered through routine inspections while the 3XMM catalogue was compiled.
Methods: We analysed the archival XMM-Newton observation of the source, obtained BUSCA photometry in three colours, and performed optical spectroscopy with the…
Seeds of Life in Space (SOLIS). VIII. SiO isotopic fractionation, and a new insight into the shocks of L1157-B1
Podio, L.; Codella, C.; Ceccarelli, C. +4 more
Context. Contrary to what is expected from models of Galactic chemical evolution, the isotopic fractionation of silicon (Si) in the Galaxy has recently been found to be constant. This finding calls for new observations, also at core scales, to re-evaluate the fractionation of Si.
Aims: L1157-B1 is one of the outflow-shocked regions along the …
A new trigger mechanism for coronal mass ejections. The role of confined flares and photospheric motions in the formation of hot flux ropes
van Driel-Gesztelyi, L.; Green, L. M.; Valori, G. +1 more
Context. Many previous studies have shown that the magnetic precursor of a coronal mass ejection (CME) takes the form of a magnetic flux rope, and a subset of them have become known as "hot flux ropes" due to their emission signatures in ∼10 MK plasma.
Aims: We seek to identify the processes by which these hot flux ropes form, with a view of …
SiO maser astrometry of the red transient V838 Monocerotis
Menten, Karl M.; Reid, Mark J.; Ortiz-León, Gisela N. +3 more
We present multiepoch observations with the Very Long Baseline Array of SiO maser emission in the v = 1, J = 1-0 transition at 43 GHz from the remnant of the red nova V838 Mon. We modeled the positions of maser spots to derive a parallax of 0.166 ± 0.060 mas. Combining this parallax with other distance information results in a distance of 5.6 ± 0.…
Discovery of new members of the nearby young stellar association in Cepheus
Montes, D.; Grosso, N.; Guillout, P. +4 more
Context. Young field stars are hardly distinguishable from older ones because their space motion rapidly mixes them with the stellar population of the Galactic plane. Nevertheless, a careful target selection allows for young stars to be spotted throughout the sky.
Aims: We aim to identify additional sources associated with the four young como…