NGC 3810.---SABbc: Nuclear point source embedded in large, slightly
elliptical bulge. Two-armed spiral pattern emerges from the bulge,
with well defined, high-contrast inner arms. The arms become patchy,
diffuse, and irregular after winding ~90deg. They split into at least
four outer arms. Even the outer arms are rich in bright knots.
NGC 3368, NGC 3810 and NGC 5854: Our major-axis kinematics are in good
agreement with the literature. This is also true for the V_*_ we measured
along the minor axis of NGC 5854.
27. NGC 3810 is an Sc spiral of low inclination. It is characterized by a
fairly sudden decrease of surface brightness between inner and outer arms,
without a change of position angle. However, the fit did not pose any
Hubble Atlas, p. 30
Jan 5/6, 1951
The spiral pattern of NGC 3810 resembles
that of NGC 1068 (Sb; panel 138). The central
disk is filled with very-high-surface-brightness,
tightly wound spiral fragments.
Lower-surface-brightness arms with more-open pitch
angles exist outside the break in the surface-brightness
distribution over the inner half of the image.
The largest HII regions may just resolve at
the 1" level. Candidates for individual brightest
stars exist, but they must be verified by standard
techniques that separate the stars from HII
The redshift is v_o = 860 km/s.
NGC 3810 was detected by S88 at half our observed intensity. SEC also
observed NGC 3810 and their intensity (no published spectrum) is higher
than S88 despite their larger beam. The central region of NGC 3810
appears to be starbursting or at least has a high surface brightness
compared to the outer regions (as in NGC 1068). No such change is seen in
the CO content but the CO(2-1) appears weaker than the CO( 1-0) in the
lower surface brightness area although thorough mapping is necessary to
Ap. J., 194, 559, 1974.
Ap. J., 190, 509, 1974.
HII Regions and Distance Modulus:
Ap. J., 194, 559, 1974.
SA(rs)c (de Vaucouleurs), Sc- (Holmberg)
Approximately 5.5^deg^ preceding M 66 subgroup in Leo group, background?
Very small, bright nucleus in a bright center part: 0.85 arcmin x 0.7 arcmin.
Pseudo (r): 0.55 arcmin x 0.4 arcmin. Many partially resolved, filamentary
arms. Rather similar to NGC 1068.
Heidelberg Veroff. Vol. 9, 1926 dimensions are for the bright part only.
Zeit. fur Ap., 50, 168, 1960.
Jan. 5/6, 1951
NGC 3810 and NGC 5962 (below) are the Sc counterparts
to the "two-region-surface-brightness" galaxies like
NGC 5055 and NGC 1068 of the Sb section (pp. 15 and 16).
Spiral structure can be traced to within about 3 sec of arc
radius (1 mm on the illustration) from the center. The
distance modulus of NGC 3810 is about (m-M) = 30.4. Three
seconds of arc is 200 parsecs at this distance. The width
of the outer arms is about 600 parsecs, which is somewhat
smaller than the width in M101 or M51. The arms of NGC 3810
are resolved into knots.