Bibcode
Diaz, Ruben J.; Dottori, Horacio; Mediavilla, Evencio; Aguero, Maria; Mast, Damian
Referencia bibliográfica
New Astronomy Reviews, Volume 49, Issue 10-12, p. 547-552.
Fecha de publicación:
1
2006
Revista
Número de citas
7
Número de citas referidas
3
Descripción
We present a scientific case approached through high quality 3D NIR
spectroscopy performed with CIRPASS, attached to the Gemini South
telescope. A binary mass concentration at the nucleus of the galaxy M 83
was suggested by Thatte et al. [A&A 364 (2000) L47] and Mast et al.
[BAAA 45 (2002) 98. Astroph#0505264] determined the possible position of
the hidden secondary mass concentration with 2D H-alpha kinematics. The
preliminary results of the NIR study presented here are based in almost
1500 spectra centered in the wavelength 1.3 μm, with a spectral
resolving power of 3200. They allow us to unveil, with 0.36″ (6.4
pc) sampling and subarcsecond resolution, the velocity field in a region
of 13″ × 9″ around the optical nucleus. We confirm
that the optical nucleus is not located at the most important center of
symmetry of the ionized gas velocity field. The largest black hole that
could fit to the circular motion in this kinematic center should have a
mass not larger than 3 × 106(sin i)-1
M&sun; solar masses.