A Correlation between Galaxy Light Concentration and Supermassive Black Hole Mass

Details A Correlation between Galaxy Light Concentration and Supermassive Black Hole Mass A Correlation between Galaxy Light Concentration and Supermassive Black Hole Mass

2001-11-07

arxiv.org/abs/astro-ph/0111152v2

Astronomy and Astrophysics

Astrophysics

7 pages, 1 table, 2 figures. ApJ Letters, accepted

Scientific paper

10.1086/338500

We present evidence for a strong correlation between the concentration of bulges and the mass of their central supermassive black hole (M_bh) -- more concentrated bulges have more massive black holes. Using C_{r_e}(1/3) from Trujillo, Graham & Caon (2001b) as a measure of bulge concentration, we find that log (M_bh/M_sun) = 6.81(+/-0.95)C_{r_e}(1/3) + 5.03(+/-0.41). This correlation is shown to be marginally stronger (Spearman's r_s=0.91) than the relationship between the logarithm of the stellar velocity dispersion and log M_bh (Spearman's r_s=0.86), and has comparable, or less, scatter (0.31 dex in log M_bh), which decreases to 0.19 dex when we use only those galaxies whose supermassive black hole's radius of influence is resolved and remove one well understood outlying data point).

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