mirage

An investigation into the variability of methanol and hydroxyl masers in the star-forming region G12.89+0.49 / Mihloti Christina Langa

Boloka/Manakin Repository

Show simple item record

dc.contributor.author Langa, Mihloti Christina
dc.date.accessioned 2009-03-17T06:19:27Z
dc.date.available 2009-03-17T06:19:27Z
dc.date.issued 2006
dc.identifier.uri http://hdl.handle.net/10394/1700
dc.description Thesis (M.Sc. (Astro Physics and Space Science))--North-West University, Potchefstroom Campus, 2007.
dc.description.abstract It is now widely accepted that 6.7 GHz and 12.2 GHz class I1 methanol masers are signposts of very young high mass star-forming regions. The exact location of these masers is still a matter of debate, they may be in disks or shocks near these objects. Hydroxyl masers also show strong emission at 1665 MHz in these regions. They may be excited by the same mechanisms as the methanol masers. Both maser species sometimes show variability. The information from maser variability can be useful in determining conditions and physical changes occurring in these regions. A daily monitoring program was set up to study the variability of methanol and hydroxyl masers in the G12.89+0.49 star-forming region. G12.89+0.49 is one of the 54 sources monitored by Goedhart et al. (2004). It had shown a flickering behaviour which was not fully characterised, hence the current observations were undertaken. Methanol masers were observed at 6.7 GHz and 12.2 GHz and hydroxyl masers at 1665 MHz using the 26-m telescope at Hartebeesthoek. The results show that the methanol maser exhibits regular variability with a period between 29 and 30 days. The hydroxyl masers show a little variability.
dc.publisher North-West University
dc.title An investigation into the variability of methanol and hydroxyl masers in the star-forming region G12.89+0.49 / Mihloti Christina Langa en
dc.type Thesis en
dc.description.thesistype Masters


Files in this item

This item appears in the following Collection(s)

  • ETD@PUK [5368]
    This collection contains the original digitized versions of research conducted at the North-West University (Potchefstroom Campus)

Show simple item record

Search the NWU Repository


Advanced Search

Browse

My Account

Statistics