6 papers
COUP census of X-ray stars in BN-KL and OMC-1S
N. Grosso, E. D. Feigelson, K. V. Getman +11
We present a study of the X-ray sources detected in the vicinity of two density peaks in the Orion Molecular Cloud 1 (OMC-1) behind the Orion Nebula Cluster (ONC), as seen in the e…
Applications of precision astrometry to studies of massive YSOs
M. J. Rioja, L. Moscadelli, R. Cesaroni
We present VLBI observations of the HO maser emission towards a selection of massive young stellar objects (YSOs). In one of these sources, IRAS20126+4104, the measured proper…
Phase transitions as topology changes in configuration space: an exact result
Lapo Casetti, E. G. D. Cohen, Marco Pettini
The phase transition in the mean-field XY model is shown analytically to be related to a topological change in its configuration space. Such a topology change is completely describ…
The impact of population III objects on the early universe
Benedetta Ciardi, Andrea Ferrara
We study the effects of the ionizing and dissociating photons produced by Pop III objects on the surrounding intergalactic medium. We find that the typical size of a H_2 photodisso…
Why is the X-ray luminosity function different for the Hyades and Praesepe?
D. Barrado y Navascues, J. R. Stauffer, S. Randich
We have studied dF-dK and dM stars belonging to Praesepe in order to determine membership via radial velocities and to compare several stellar properties, such as X-ray luminositie…
Near Infrared Spectra of the Orion Bar
A. Marconi, L. Testi, A. Natta +1
We have used the LONGSP spectrometer on the 1.5-m TIRGO telescope to obtain long slit spectra in the J, H, and K wavelength bands towards two positions along the Orion bar. These d…