Warm gas in protoplanetary disks
Abstract
This thesis presents a study of warm CO, [OI] and H2 gas coming from the disks around Herbig Ae/Be stars. These various gas tracers are each a proxy for a different radial and vertical region of the PP disk surface.
Our sample consists of disks whose shape (based on modeling of the the disk dust emission) can be divided into flaring and self-shadowed (flat). We find [1] evidence for the vertical decoupling of gas and dust in one disks (Chapter 2); [2] That disk geometry has a large influence on the spatial distribution and excitation mechanism of the CO emission (chapters 3,4); [3] Near-IR H 2 emission around 2 (out of 14) HAEBE stars, probably originating from large (±50AU) radii of the disk (chapter 5). In chapter 6 we investigate the trends between CO emission and disk geometry as noted in Chapter 3 and 4.- Publication:
-
Ph.D. Thesis
- Pub Date:
- December 2010
- Bibcode:
- 2010PhDT........79V
- Keywords:
-
- Herbig Ae/Be stars;
- protoplanetary disks;
- CO rovibrational emission;
- forbidden oxygen emission