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Positive and Negative Superhumps

pukemaru's picture
pukemaru
Online
Joined: 2010-09-03

Study of Negative and Positive Superhumps in ER Ursae Majoris

This paper has just been released.

Please can someone direct me to a place that describes positive and negative superhumps in language that can be understood by a layman (if that is possible).

Thx

Stephen [HSP]

positive and negative superhumps
FRF's picture
FRF
Offline
Joined: 2010-08-09

Positive superhump is the "classic" superhump: it's period is longer than the orbital period of the CV.
Negative superhump: it's period is shorter than the the orbital period of the CV.

Regarding the physical origin of these superhumps there are various theories. Some of them can be found here:

http://iopscience.iop.org/0004-637X/661/2/1042
http://arxiv.org/abs/1305.5877
http://arxiv.org/abs/1212.1516
http://adsabs.harvard.edu/abs/2013AcA....63..109S

Clear skies,

Robert

positive and negative superhumps
pukemaru's picture
pukemaru
Online
Joined: 2010-09-03

Thanks, Robert. Much appreciated

Stephen

Negative superhumps
marlin's picture
marlin
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Joined: 2010-08-31

"Cataclysmic Variable Stars" by Coel Hellier is the standard text on the subject.  Look at Chapter 6 for a short synopsis of superhumps. 

Marlin

AAVSO 49 Bay State Rd. Cambridge, MA 02138 aavso@aavso.org 617-354-0484