We report the discovery of peculiar features in the optical spectrum of 4C+22.25, a flat spectrum radio quasar at z = 0.4183 observed in the Sloan Digital Sky...
-
PublicationThe Peculiar Optical Spectrum of 4C+22.25: Imprint of a Massive Black Hole Binary?
-
PublicationThe Penas Pasera tumulus field of the Celtiberian city of Aratis (Aranda del Moncayo, Zaragoza, Spain) and the Celtic calendar
Within the actions carried out by the Directorate General of Cultural Heritage of the Government of Aragon in relation to the judicial procedure on the pillage...
-
PublicationThe Penn State - Toruń Centre for Astronomy Planet Search stars
Aims: We present the complete spectroscopic analysis of 455 stars observed within the Penn State - Toruń Centre for Astronomy Planet Search (PTPS) with the High...
-
PublicationThe Penn State - Toruń Centre for Astronomy Planet Search stars (Corrigendum). III. The sample of evolved stars
Based on observations obtained with the Hobby-Eberly Telescope, which is a joint project of the University of Texas at Austin, the Pennsylvania State University...
-
PublicationThe Penn State - Toruń Centre for Astronomy Planet Search stars. II. Lithium abundance analysis of the red giant clump sample
Context. Standard stellar evolution theory does not predict existence of Li-rich giant stars. Several mechanisms for Li-enrichment have been proposed to operate...
-
PublicationThe Penn State - Toruń Centre for Astronomy Planet Search stars. IV. Dwarfs and the complete sample
Context. Our knowledge of the intrinsic parameters of exoplanets is as precise as our determinations of their stellar hosts parameters. In the case of radial...
-
PublicationThe Penn State-Toruń Centre for Astronomy Planet Search stars. I. Spectroscopic analysis of 348 red giants
Aims: We present basic atmospheric parameters (Teff, log g, vt, and [Fe/H]) as well as luminosities, masses, radii, and absolute radial velocities for 348 stars...
-
PublicationThe PEP survey: clustering of infrared-selected galaxies and structure formation at z ˜ 2 in GOODS-South
This paper presents the first direct estimate of the 3D clustering properties of far-infrared sources up to z˜ 3. This has been possible thanks to the PACS...
-
PublicationThe persistent activity of Jupiter-family comets at 3–7 AU
We analyze the activity of 89 comets observed with the Spitzer Space Telescope.We conclude that at least 24% of Jupiter-family comets are active at 3–7 AU...