Open AccessFrom the Tully–Fisher relation to the Fundamental Plane through mergers
Author(s) -
Aceves Héctor,
Velázquez Héctor
Publication year - 2005
Publication title -
monthly notices of the royal astronomical society: letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.067
H-Index - 122
eISSN - 1745-3933
pISSN - 1745-3925
DOI - 10.1111/j.1745-3933.2005.00044.x
Subject(s) - physics , fundamental plane (elliptical galaxies) , astrophysics , tully–fisher relation , spiral galaxy , galaxy , sky , plane (geometry) , galaxy rotation curve , galaxy formation and evolution , geometry , disc galaxy , mathematics
We set up a series of self‐consistent N ‐body simulations to investigate the Fundamental Plane of merger remnants of spiral galaxies. These last ones are obtained from a theoretical Tully–Fisher relation at z = 1 , assuming a constant mass‐to‐light ratio within the Λ cold dark matter cosmogony. Using a Sérsic growth curve and an orthogonal fitting method, we find that the Fundamental Plane of our merger remnants is described by the relation R e ∝σ 1.48±0.01 0 I −0.75±0.01 e , which is in good agreement with that reported from the Sloan Digital Sky Survey, R e ∝σ 1.49±0.05 0 I −0.75±0.01 e . However, the R 1/4 ‐profile leads to a Fundamental Plane given by R e ∝σ 1.79±0.01 0 I −0.60±0.01 e . In general, the correlation found in our merger remnants arises from homology breaking ( V 2 ∝σ ν 0 , R g ∝ R η e ) in combination with a mass scaling relation between the total and luminous mass, M ∝ M γ L . Considering an orthogonal fitting method, it is found that 1.74 ≲ν≲ 1.79, 0.21 ≲η≲ 0.52 and 0.80 ≲γ≲ 0.90 depending on the adopted profile (Sérsic or R 1/4 ).