Search Publications
Modelling the dust emission of a filament in the Taurus molecular cloud
Juvela, Mika
Context. Dust emission is an important tool in studies of star-forming clouds as a tracer of column density. This is done indirectly via the dust evolution that is connected to the history and physical conditions of the clouds.
Aims: We examine the radiative transfer (RT) modelling of dust emission over an extended cloud region, using a filam…
A pilot study of Galactic radio recombination lines using FAST: Identification of diffuse ionized gas clumps and off-arm star-forming regions
Fang, Min; Li, Juan; Li, Shanghuo +6 more
Observing low-frequency decimeter hydrogen radio recombination lines (RRLs) with large single-dish telescopes, such as the Five-hundred-meter Aperture Spherical radio Telescope (FAST) in the L band, is a unique method for probing massive star formation on scales of hundreds of parsecs. This approach is particularly effective for detecting relative…
Retrieved atmospheric properties of the sub-stellar object VHS 1256 b with HST, VLT, and JWST spectra
Zhou, Yifan; Bowler, Brendan P.; Vos, Johanna M. +3 more
Motivated by the observed ~30% variations in flux from the L7 dwarf VHS 1256 b, we subjected its time-resolved Hubble Space Telescope (HST) WFC3 spectra (measured in two epochs: 2018 and 2020), as well as medium-resolution Very Large Telescope (VLT) X-shooter and Early Release Science James Webb Space Telescope (JWST) spectra to a suite of both st…
Supervised machine learning on Galactic filaments: II. Encoding the position to optimize the detection of filaments over a wide range of column density and contrast
Arzoumanian, D.; Zavagno, A.; Schisano, E. +5 more
Context. Filaments host star formation and are fundamental structures of galaxies. Their diversity, as observed in the interstellar medium, from very low-density structures to very dense hubs, and their complex life cycles make their complete detection challenging over this large diversity range. Aims. Using 2D H2 column density images …
Central molecular zones in galaxies: 13CO(6–5) and molecular gas conditions in bright nearby galaxies
Güsten, R.; Israel, F. P.; Lundgren, A.
This paper summarizes all presently available Jupp ≥ 5 13CO and accompanying 12CO measurements of galaxy centers including new J = 6–5 13CO and 12CO observations of eleven galaxies with the Atacama Pathfinder EXperiment (APEX) telescope and also Herschel high-J measurements of both species in …
Lack of emission lines in the optical spectra of SAX J1808.4–3658 during reflaring of the 2019 outburst
D'Avanzo, P.; Campana, S.; Russell, D. M. +5 more
Aims. We present spectroscopy of the accreting X-ray binary and millisecond pulsar SAX J1808.4–3658. These observations are the first to be obtained during a reflaring phase. We collected spectroscopic data during the beginning of the reflaring of the 2019 outburst and compared them to previous datasets taken at different epochs, both of the same …
The role of stellar mass in the cosmic history of star formation as seen by Herschel and ALMA
Magnelli, B.; Daddi, E.; Elbaz, D. +4 more
Aims. We explore the contribution of galaxies, as a function of their stellar mass, to the cosmic star formation history (CSFH). In order to avoid uncertain extrapolations of the infrared luminosity function, which is often polluted by the contribution of starbursts, we base our analysis on stellar mass. Attenuation by dust is accounted for thanks…
Asteroid (4337) Arecibo: Two ice-rich bodies forming a binary. Based on Gaia astrometric data
Hestroffer, Daniel; David, Pedro; Desmars, Josselin +1 more
Context. Binary asteroids are present in all populations of the Solar System, from near-Earth to trans-Neptunian regions. As is true for the small Solar System bodies (SSSBs), binary asteroids generally offer valuable insights into the formation of the Solar System, as well as its collisions and dynamic evolution. In particular, the binaries provi…
Infrared colours and bolometric corrections of SiO masing stars in the inner Milky Way
Messineo, Maria
Aims: We analysed a sample of SiO-masing late-type stars located in the inner Galaxy with the goal of setting better constraints on their obscuration.
Methods: This reference sample has allowed us to define mathematical relations between their dereddened infrared colours and the observed colours (e.g. Ks-[8], Ks-[24…
Current and secular accretion rates of EX Hydrae
Beuermann, K.; Reinsch, K.
We report an observed accretion rate of Ṁ1 = (3.86 ± 0.60) × 10−11 M⊙ yr−1 for the white dwarf in the short-period, intermediate polar