Search Publications
PLATO on the shoulders of TESS: analysing mono-transit planet candidates in TESS data as a prior knowledge for PLATO observations
Vines, Jose I.; Piotto, Giampaolo; Kostov, Veselin +9 more
The Transiting Exoplanet Survey Satellite (TESS) and the upcoming mission PLAnetary Transits and Oscillations of stars (PLATO) represent two space-based missions with complementary objectives in the field of exoplanet science. While TESS aims at detecting and characterizing exoplanets around bright and nearby stars on a relative short-period orbit…
Cloud-cloud collision in S235: triggered the formation of high-mass stars and young star clusters
Fang, Min; Gao, Yu; Zhang, Shiyu +7 more
We present the analysis of cloud-cloud collision (CCC) process in the Galactic molecular complex S235. Our new CO observations performed with the PMO-13.7 m telescope reveal two molecular clouds, namely the S235-Main and the S235-ABC, with ~4 km s-1 velocity separation. The bridge feature, the possible colliding interface and the comple…
Edge-on galaxies in the HST COSMOS field: the evolution of stellar discs up to z 0.5
Usachev, Pavel A.; Reshetnikov, Vladimir P.; Savchenko, Sergey S.
We present a sample of 950 edge-on spiral galaxies found with the use of an artificial neural network in the Hubble Space Telescope COSMOS field. This is currently the largest sample of distant edge-on galaxies. For all galaxies we analysed the 2D brightness distributions in the F814W filter and measured the radial and vertical exponential scales …
Diffuse interstellar bands in the near-infrared: expanding the reddening range
Najarro, F.; Geballe, T. R.; Garcia, M. +2 more
We have investigated the behaviour of three strong near-infrared diffuse interstellar bands (DIBs) at λ13177 Å, λ14680 Å, and λ15272 Å, on a larger sample of sightlines and over a wider range of extinctions than previously studied, utilizing spectra from three observatories. We applied two telluric correction techniques to reduce atmospheric conta…
Probing the strength of radial migration via churning by using metal-rich red giant stars from APOGEE
Kordopatis, Georges; Feltzing, Sofia; Lehmann, Christian +1 more
Making use of the APOGEE DR17 catalogue with high quality data for 143 509 red giant branch stars we explore the strength of different mechanisms that causes a star to radially migrate in the Milky Way stellar disc. At any position in the disc we find stars that are more metal-rich than the local interstellar medium. This is surprising and normall…
eUDS: the SRG/eROSITA X-ray survey of the UKIDSS Ultra Deep Survey field. Catalogue of sources
Sunyaev, R.; Krivonos, R.; Sazonov, S. +2 more
The eROSITA X-ray telescope on board the Spectrum-Roentgen-Gamma (SRG) spacecraft observed the field of the UKIDSS Ultra-Deep Survey (UDS) in August-September 2019, during its flight to Sun-Earth L2 point. The resulting eROSITA UDS (or eUDS) survey was thus the first eROSITA X-ray imaging survey, which demonstrated the capability of the telescope …
Dealing with broad-band X-ray spectra of faint AGN: a case study
Malizia, A.; Bassani, L.; Molina, M.
In this work, we analyse three average-luminosity hard X-ray selected AGN: ESO 506-G27, IGR J19039+3344, and NGC 7465. They have simultaneous Swift/XRT and NuSTAR data never published before and have been poorly studied at X-ray energies. These sources make for interesting targets both from a methodological and scientific point of view. Scientific…
INTEGRAL search for magnetar giant flares from the Virgo Cluster and in nearby galaxies with high star formation rate
Mereghetti, Sandro; Salvaterra, Ruben; Pacholski, Dominik Patryk +1 more
Giant flares from magnetars can reach, for a fraction of a second, luminosities greater than 10
Finding dusty AGNs from the JWST CEERS survey with mid-infrared photometry
Kilerci, Ece; Hashimoto, Tetsuya; Goto, Tomotsugu +8 more
The nature of the interaction between active galactic nuclei (AGNs) and their host galaxies remains an unsolved question. Therefore, conducting an AGN census is valuable for AGN research. Nevertheless, a significant fraction of AGNs are obscured by their environment, which blocks UV and optical emissions due to the dusty torus surrounding the cent…
Fine structure of the age-chromospheric activity relation in solar-type stars: II. Hα line
Ribas, I.; Porto de Mello, G. F.; Almeida-Fernandes, F. +4 more
Excess chromospheric emissions within deep photospheric lines are effective proxies of stellar magnetism for FGK stars. This emission decays with stellar age and is a potential determinant of this important stellar quantity. We report absolutely calibrated H $\alpha$ chromospheric fluxes for 511 solar-type stars in a wide interval of precisely det…