qnm

Calculate quasinormal modes of Kerr black holes.

The highest-level interface is via qnm.cached.KerrSeqCache, which will fetch instances of qnm.spinsequence.KerrSpinSeq. This is most clearly demonstrated with an example.

Examples

>>> import qnm
>>> # qnm.download_data() # Only need to do this once
>>> grav_220 = qnm.modes_cache(s=-2,l=2,m=2,n=0)
>>> omega, A, C = grav_220(a=0.68)
>>> print(omega)
(0.5239751042900845-0.08151262363119986j)

Members

qnm.download_data([overwrite])	Fetch and decompress tarball of precomputed spin sequences from the web.
qnm.modes_cache	Interface to the cache of QNMs.

qnm.download_data(overwrite=False)

Fetch and decompress tarball of precomputed spin sequences from the web.

Parameters:

overwrite: bool, optional [default: False]

If there is already a tarball on disk, this flag controls whether or not it is overwritten.

Module Attributes

modes_cache

Interface to the cache of QNMs.

qnm.modes_cache = <qnm.cached.KerrSeqCache object>

Interface to the cache of QNMs. This is a singleton instance of qnm.cached.KerrSeqCache. It can be called like a function qnm.modes_cache(s,l,m,n) to get a specific mode, the result being an instance of qnm.spinsequence.KerrSpinSeq.