Search Publications
SPICE point spread function correction: General framework and capability demonstration
Peter, H.; Auchère, F.; Fludra, A. +4 more
We present a new method of removing point spread function (PSF) artifacts and improving the resolution of multidimensional data sources, including imagers and spectrographs. Rather than deconvolution, which is translationally invariant, the method we present is based on sparse matrix solvers. This allows it to be applied to spatially varying PSFs …
Identification of late-type Class I stars using Gaia DR3 Apsis parameters
Messineo, Maria
Aims: We examined the Gaia DR3 GSP-Phot and GSP-Spec parameters of known K- and M-type stars of Class I luminosity to make a comparison with the parameters collected from the literature to assess their accuracy and their potential in setting stellar classifications of intrinsically bright late-types that have been unknown thus far. Gaia DR3 G…
Study of oxygen-rich post-AGB stars in the Milky Way as a means to explain the production of silicates among evolved stars
Dell'Agli, F.; Ventura, P.; Marchetti, T. +4 more
Context. The study of post-asymptotic giant branch (post-AGB) stars is a valuable tool in improving our understanding of poorly known aspects of the evolution of the stars throughout the asymptotic giant branch (AGB). This can be done thanks to the availability of more accurate determinations of their surface chemical composition and the peculiar …
Similar levels of deuteration in the pre-stellar core L1544 and the protostellar core HH211
Caselli, P.; Spezzano, S.; Lique, F. +6 more
Context. In the centre of pre-stellar cores, deuterium fractionation is enhanced due to low temperatures and high densities. Therefore, the chemistry of deuterated molecules can be used to probe the evolution and the kinematics in the earliest stages of star formation.
Aims: We analyse the deuterium fractionation of simple molecules, comparin…
Properties of the dense cores and filamentary structures in the Vela C molecular cloud
Zhang, Guo-Yin; Zhang, Chang; Li, Jin-Zeng +3 more
The initial and boundary conditions of the Galactic star formation in molecular clouds are not well understood. In an effort to shed new light on this long-standing problem, we measured the properties of dense cores and filamentary structures in the Vela C molecular cloud, observed with Herschel. We used the hires algorithm to create high-resoluti…
The Hubble/STIS near-ultraviolet transmission spectrum of HD 189733 b
France, K.; Fossati, L.; Cubillos, P. E. +5 more
The benchmark hot Jupiter HD 189733 b has been a key target, used to lay out the foundations of comparative planetology for giant exo-planets. As such, HD 189733 b has been extensively studied across the electromagnetic spectrum. Here we report the observation and analysis of three transit light curves of HD 189733 b obtained with Hubble/STIS in t…
Molecules in the peculiar age-defying source IRAS 19312+1950
Zhang, Yong; Zhang, Jiang-Shui; Nakashima, Jun-ichi +5 more
Context. IRAS 19312+1950 is an isolated infrared source that exhibits a characteristic quasi-point-symmetric morphology in the near-and mid-infrared images and is also very bright in molecular radio lines. Because of its unique observational characteristics, various observational studies have been conducted and several hypotheses have been propose…
Supermassive black hole wake or bulgeless edge-on galaxy?
Trujillo, Ignacio; Montes, Mireia; Sánchez Almeida, Jorge
A recent paper reported the serendipitous discovery of a thin linear object interpreted as the trail of star-forming regions left behind by a runaway supermassive black hole (SMBH) kicked out from the center of a galaxy. Despite the undeniable interest in the idea, the actual physical interpretation is not devoid of difficulty. The wake of a SMBH …
Imaging and spectroscopic observations of extreme-ultraviolet brightenings using EUI and SPICE on board Solar Orbiter
Peter, H.; Chitta, L. P.; Solanki, S. K. +16 more
Context. The smallest extreme-ultraviolet (EUV) brightening events that were detected so far, called campfires, have recently been uncovered by the High Resolution EUV telescope (HRIEUV), which is part of the Extreme Ultraviolet Imager (EUI) on board Solar Orbiter. HRIEUV has a broad bandpass centered at 17.4 nm that is domin…
The GAPS programme at TNG. XLIV. Projected rotational velocities of 273 exoplanet-host stars observed with HARPS-N
Scandariato, G.; Poretti, E.; Rainer, M. +25 more
Context. The leading spectrographs used for exoplanets' search and characterization offer online data reduction softwares (DRS) that yield, as an ancillary result, the full-width at half-maximum (FWHM) of the cross-correlation function (CCF) that is used to estimate the radial velocity of the host star. The FWHM also contains information on the st…