5 papers
Thermal background reduction for mid-infrared imaging by low-rank background and sparse point-source modelling
R. A. R. Moens, A. G. M. Pietrow, B. Brandl +1
Mid-infrared astronomy from the ground faces critical challenges in accurately detecting and quantifying sources due to the dominant spatially and time-variable background noise. M…
First detection of ices in intermediate-mass young stellar objects beyond the Milky Way
Guido De Marchi, Nolan Habel, Margaret Meixner +15
Using NIRSpec on JWST, we studied a sample of 15 intermediate-mass (1.8-4.1 Msun) young stellar objects (YSOs) previously identified with MIRI photometry in the low-metallicity NGC…
Kinematic evidence of magnetospheric accretion for Herbig Ae stars with JWST NIRSpec
Ciarán Rogers, Bernhard Brandl, Guido de Marchi
Hydrogen emission lines have been used to estimate the mass accretion rate of pre-main-sequence stars for over years, although the physical origin of these lines is still uncl…
Externally irradiated young stars in NGC 3603. A JWST NIRSpec catalogue of pre-main-sequence stars in a massive star formation region
Ciarán Rogers, Guido de Marchi, Bernhard Brandl
NGC 3603 is the optically brightest massive star forming region (SFR) in the Milky Way, representing a small scale starburst region. Studying young stars in regions like this allow…
Protoplanetary discs around sun-like stars appear to live longer when the metallicity is low
Guido De Marchi, Giovanna Giardino, Katia Biazzo +17
Previous Hubble Space Telescope (HST) observations of the star-forming cluster NGC 346 in the Small Magellanic Cloud (SMC) had revealed a large population of pre-main sequence (PMS…