The black hole and central stellar population of MCG-6-30-15
Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
We present the first near-IR integral field spectroscopy observations of
the galaxy MCG-6-30-15. The H-band data studied in this paper cover the
central 500 pc of the galaxy at the best resolution (0.1 arcsec) so far.
The spectra of the innermost regions are dominated by broad Brackett
series emission lines and non-stellar continuum, under which we are able
to trace the distribution and kinematics of the stars and also the [Fe
II] line emission. We find that there is a counter-rotating stellar core
extending out to 125 pc, which appears to be associated with the [Fe II]
emission. Based on the mass-to-light ratio, and the presence of this
emission line, we estimate the age of the central stellar population to
be of the order of 65 Myr. We show that the gas needed to fuel the black
hole is, at most, only 1 per cent of that needed to form these stars. We
derive independent constraints on the black hole mass using the
dynamical information and determine an upper limit for the black hole
mass, MBH <6 × 107 M⊙,
that is consistent with other estimates.
Originalsprog | Engelsk |
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Tidsskrift | Monthly Notices of the Royal Astronomical Society |
Vol/bind | 431 |
Udgave nummer | 3 |
Sider (fra-til) | 2294-2306 |
ISSN | 0035-8711 |
DOI | |
Status | Udgivet - 1 maj 2013 |
Eksternt udgivet | Ja |
ID: 230475920