Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Galactic Bulges from HST NICMOS Observations: central galaxian objects,
  and nuclear profile slopes   We have measured the central structural properties for a sample of S0-Sbc
galaxies down to scales of ~10 pc using HST NICMOS images. We find that the
photometric masses of the central star clusters, which occur in 58% of our
sample, are related to their host bulge masses such that MassPt =
10^{7.75\pm0.15}(MassBul/10^{10}MassSun)^{0.76\pm 0.13}. Put together with
recent data on bulges hosting supermassive black holes, we infer a non-linear
dependency of the `Central Massive Object' mass on the host bulge mass such
that MassCMO = 10^{7.51\pm 0.06} (MassBul/10^{10}MassSun)^{0.84 \pm 0.06}. We
argue that the linear relation presented by Ferrarese et al. is biased at the
low-mass end by the inclusion of the disc light from lenticular galaxies in
their sample. Matching our NICMOS data with wider-field, ground-based K-band
images enabled us to sample from the nucleus to the disk-dominated region of
each galaxy, and thus to perform a proper bulge-disk decomposition. We found
that the majority of our galaxies (~90%) possess central light excesses which
can be modeled with an inner exponential and/or an unresolved point source in
the case of the nuclear star clusters. All the extended nuclear components,
with sizes of a few hundred pc, have disky isophotes, which suggest that they
may be inner disks, rings, or bars; their colors are redder than those of the
underlying bulge, arguing against a recent origin for their stellar
populations. Surface brightness profiles rise inward to the resolution limit of
the data, with a continuous distribution of logarithmic slopes from the low
values typical of dwarf ellipticals (0.1 \leq gamma \leq 0.3) to the high
values (gamma ~ 1) typical of intermediate luminosity ellipticals; the nuclear
slope bi-modality reported by others is not present in our sample.

26
The categories of this paper are: bayes-an
17
The categories of this paper are: q-fin
33
The categories of this paper are: plasm-ph
2
The categories of this paper are: math
19
The categories of this paper are: eess
4
The categories of this paper are: cond-mat
15
The categories of this paper are: nucl-ex
30
The categories of this paper are: q-alg
3
The categories of this paper are: physics
29
The categories of this paper are: funct-an
21
The categories of this paper are: adap-org
0
The categories of this paper are: hep-ph
34
The categories of this paper are: chem-ph
20
The categories of this paper are: acc-phys
31
The categories of this paper are: ao-sci
1
The categories of this paper are: cs