ar X iv : a st ro - p h / 02 08 14 8 v 1 7 A ug 2 00 2 On the Ejection Mechanism of Bullets in SS 433

ar X iv : a st ro - p h / 02 08 06 8 v 1 2 A ug 2 00 2 Fast Infrared Sub - Flares From GRS 1915 + 105

We report the discovery of fast (∼ 100 sec) 2.2 µm flares from the micro-quasar GRS 1915+105, which are superimposed on longer (∼ 30 min), brighter flares corresponding to episodes of jet formation. The number and strength of the sub-flares in each bright flare varies, and does not seem to correlate in any obvious way with the underlying light curve or with changes in the X-ray emission. Howeve...

ar X iv : a st ro - p h / 04 08 13 5 v 1 9 A ug 2 00 4 A Determination of the Chemical Composition of α Centauri A from Strong Lines

ar X iv : a st ro - p h / 02 08 04 4 v 1 1 A ug 2 00 2 Submitted to ApJL . The Spectrum of the Mass Donor Star in SS 433

We present results from a short series of blue, moderate resolution spectra of the microquasar binary, SS 433. The observations were made at a time optimized to find the spectrum of the donor star, i.e., when the donor was in the foreground and well above the plane of the obscuring disk. In addition to the well-known stationary and jet emission lines, we find evidence of a weak absorption spect...

ar X iv : a st ro - p h / 02 08 10 8 v 1 6 A ug 2 00 2 Astro Particle Physics from Space

We review how some open issues on Astro Particle physics can be studied by space born experiments in a complementary way to what is being done at underground and accelerators facilities 1 At the beginning it was Astro Particle This figure shows the conference photo taken at the 1939 Chicago Symposium on Cosmic Rays. Among the partecipants we find a quite exceptional group of physicists: Kohlost...

ar X iv : a st ro - p h / 03 08 07 9 v 1 5 A ug 2 00 3 THE 2 MS CHANDRA DEEP FIELD - NORTH

The 2 Ms Chandra Deep Field-North survey provides the deepest view of the Universe in the 0.5–8.0 keV X-ray band. In this brief review we investigate the diversity of X-ray selected sources and focus on the constraints placed on AGNs (including binary AGNs) in high-redshift submm galaxies.