Deep H alpha survey of the Milky Way - V. The l=289 degrees to 295 degreesarea

An H alpha study of the ionized hydrogen in the Galactic plane direction I = 290 degrees has been undertaken. We describe and discuss the characterist ics of the numerous filaments and emission patches observed. These appear l inked to a major expanding HI bubble or shell over an area of several degre es. Thanks to morphological, kinematical and stellar distance consideration s we have linked observed HII regions and molecular clouds into star-formin g complexes which mainly trace the Carina arm. We show particularly that th e HII regions Gum35 (G289.8-1.3), Gum38b (G291.6-0.5, NGC 3603) and Hf 58 ( G291.9-0.7) can be directly linked to the farthest complexes at a distance 'd' of 8 and 9 kpc. while HII regions Gum37 (G290.6+0.3), Gum38a (G291.3-0. 7) and the expanding shell can be linked to the closest complexes located b etween 2.6 and 2.9 kpc. Important internal motions have been identified in the Gum35, Gum37, Gum38a and Gum38b HII regions. The identification and ana lysis of these motions an essential for a good systemic velocity determinat ion. We have also identified and delineated that part of the Galactic plane exhibiting velocity departures of a Delta- = 7 km s(-1) (between 285 degre es and 295 degrees and d = 3.5 and 3 kpc).