Search Publications
XMM-Newton observations of the young open cluster around λ Orionis
Franciosini, E.; Sacco, G. G.
Aims: We studied the X-ray properties of the young (~1-8 Myr) open cluster around the hot (O8 III) star λ Ori and compared them with those of the similarly-aged σ Ori cluster to investigate possible effects of the different ambient environment.
Methods: We analysed an XMM-Newton observation of the cluster using EPIC imaging and low-resol…
Identification of blue high proper motion objects in the Tycho-2 and 2MASS catalogues using Virtual Observatory tools
Caballero, J. A.; Solano, E.; Jiménez-Esteban, F. M.
Aims: With available Virtual Observatory tools, we looked for new bright blue high proper motion objects in the entire sky: white dwarfs, hot subdwarfs, runaway OB stars, and early-type stars in nearby young moving groups.
Methods: We performed an all-sky cross-match between the optical Tycho-2 and near-infrared 2MASS catalogues with Ala…
The bimodality of the 10k zCOSMOS-bright galaxies up to z ~ 1: a new statistical and portable classification based on optical galaxy properties
Kneib, J. -P.; Maccagni, D.; Cimatti, A. +56 more
Aims: Our goal is to develop a new and reliable statistical method to classify galaxies from large surveys. We probe the reliability of the method by comparing it with a three-dimensional classification cube, using the same set of spectral, photometric and morphological parameters.
Methods: We applied two different methods of classificat…
Discovery and identification of infrared counterpart candidates of four Galactic centre low mass X-ray binaries
Chaty, S.; Curran, P. A.; Zurita Heras, J. A.
Context. The near infrared (nIR)/optical counterparts of low mass X-ray binaries (LMXBs) are often observationally dim and reside in high source density fields which make their identification problematic; however, without such a counterpart identification we are unable to investigate many of the properties of LMXB systems.
Aims: Here, in the …
Oscillations in the wake of a flare blast wave
Innes, D. E.; Stenborg, G.; Tothova, D.
Context. Oscillations of coronal loops in the Sun have been reported in both imaging and spectral observations at the onset of flares. Images reveal transverse oscillations, whereas spectra detect line-of-sight velocity or Doppler-shift oscillations. The Doppler-shift oscillations are commonly interpreted as longitudinal modes.
Aims: Our aim …
INTEGRAL and Swift observations of IGR J19294+1816 in outburst
Walter, R.; Ferrigno, C.; Bozzo, E. +1 more
Context. IGR J19294+1816 was discovered by INTEGRAL in 2009 during a bright X-ray outburst and was classified as a possible Be X-ray binary or supergiant fast X-ray transient.
Aims: On 2010 October 28, the source displayed a second X-ray outburst and a two months-long monitoring with Swift was carried out to follow the evolution of the source…
Integral field spectroscopy in the near infrared of NGC 3125-A and SBS 0335-052
Sauvage, M.; Cresci, G.; Thompson, R. +1 more
We present integral field spectroscopy in the near infrared of the nearby dwarf starburst galaxy NGC 3125-A and of the low metallicity dwarf galaxy SBS 0335-052. The use of adaptive optics in the observations produces sub-arcsecond angular resolution. We pinpoint the star forming cores of both galaxies, identify relevant ISM components such as dus…
Long-period variables in the CoRoT fields
Lebzelter, T.
Aims: We searched the first set of data released by the CoRoT mission for red stars showing long-period variability (LPV). These stars are likely highly evolved stars on the upper giant branch. The high time resolution of the CoRoT data allows us to study the light curves of these variables in unprecedented detail.
Methods: Light curves …
A parsec-scale outflow from the luminous YSO IRAS 17527-2439
Varricatt, W. P.
Aims: We seek to understand the way massive stars form. The case of a luminous YSO IRAS 17527-2439 is studied in the infrared.
Methods: Imaging observations of IRAS 17527-2439 are obtained in the near-IR JHK photometric bands and in a narrow-band filter centred at the wavelength of the H2 1-0S(1) line. The continuum-subtracted…
Kinematics and stellar population of NGC 4486A
Prugniel, Ph.; Zeilinger, W.; Koleva, M. +1 more
Context. NGC 4486A is a low-luminosity elliptical galaxy harbouring an edge-on nuclear disk of stars and dust. It is known to host a super-massive black hole.
Aims: We study its large-scale kinematics and stellar population along the major axis to investigate the link between the nuclear and global properties.
Methods: We use long-slit m…