NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-05-19 T21:49:21 PDT
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Notes for object NGC 4656

10 note(s) found in NED.


1. 2005ApJS..157...59L
Re:NGC 4656
The Magellanic spiral NGC 4656 at a distance of 7.2 Mpc is interacting with its
companion NGC 4657 to its northeast. ULX1 is on the tenuous tip of the tidal
tail and is coincident with a very faint object in the DSS image.

2. 2002AJ....124..675C
Re:UGC 07907
Very extended galaxy.

3. 1994CAG1..B...0000S
Re:NGC 4656
Pair [with NGC 4657]
Hubble Atlas, p. 40
Im
H-3633-S
Feb 18/19, 1963
103aO + GG13
27 min
The complex system of NGC 4656/4657 is
listed as two galaxies in the Dreyer NGC Catalog.
It may be a single galaxy in the process of (or
having just completed) a close encounter with
NGC 4631 (Sc on edge; panel 290), which is 31'
distant. NGC 4631 is obviously at the same
distance, shown by the near equality of the redshifts
and the nearly identical levels of resolution
into individual brightest stars. The redshifts are
v_o = 606 km/s for NGC 4631 and v_o = 624 km/s
for NGC 4656/4657. The galaxies resolve
well into brightest stars beginning at about
B = 19.
The largest HII region in NGC 4656/4657
is complex and has an angular diameter (halo) of
11". At an assumed distance of 5 Mpc (Sandage
and Tammann 1974a) the linear diameter of this
HII complex is about 270 psc. At this distance
the projected linear separation of the
NGC 4656/4631 pair is small, at 44 kpc. The 21-cm
content of the pair has been measured by
Weliachew, Sancisi, and Guelin (1978). A model
of the tidal interaction is discussed by Combes
(1978).
The resolution into individual stars is so
pronounced in part of NGC 4656/4657 as to
make this galaxy a prime candidate for detailed
study of its stellar content.

4. 1986AnTok..212.127T
Re:KUG 1241+324
Main part (NGC 4656) and northeast portion (NGC 4657) compose an interacting
pair. Several clumps have high UV-excess. Values of RA and Dec in the
catalogue are those of NGC 4656.

5. 1976RC2...C...0000d
Re:NGC 4656
= Kara[72] 350b (NGC 4631 = Kara[72] 350a).
Interacting pair with NGC 4657.
Photograph:
Ap. J., 151, 117, 1968.
Ap. J., 194, 559, 1974.
Astrofizika, 6, 367, 1970.
Photometry:
Astrofizika, 6, 367, 1970.
HII Regions and Distance Modulus:
Ap. J., 194, 559, 1974.
HI 21cm:
Ap. J., 151, 117, 1968.
Astr. Ap., 3, 402, 1969.
Radio Observations:
M.N.R.A.S., 161, 127, 1973.

6. 1973UGC...C...0000N
Re:UGC 07907
SB(s)m pec + Im (de Vaucouleurs)
Ir I (Holmberg)
NGC 4657 is a companion 1.1 x 0.7 superimposed on NGC 4656
"Probably interacting pair of Magellanic systems" (de Vaucouleurs)
UGC 07865 at 32.5

7. 1964RC1...C...0000d
Re:NGC 4656
Probably interacting pair of Magellanic systems (with NGC 4657)
Perhaps like the nucleus of NGC 4038-4039.
Lick 13, Lund 9 dimensions are for the bright part only.
See also HA, 105, 231, 1937.
Photometry:
Error on V mag. in Ap. J. Suppl. 48, 1961, V = 11.81.
Spectrum:
P.A.S.P., 69, 386, 1957.
HII Regions:
Zeit. fur Ap., 50, 168, 1960.
HI Emission:
Epstein, Harvard Thesis, 1962.

8. 1961Hubbl.B...0000S
Re:NGC 4656
Irr I
S-457-H
Mar. 18/19, 1925
E40
110 min
Enlarged 4.0X
This peculiar irregular is very asymmetric in its surface
brightness. The galaxy on one side of the nucleus is
bright; on the opposite side, it is very faint. There are
two segments on the faint side. The galaxy is well resolved
into stars and HII regions.

9. 1956AJ.....61...97H
Re:NGC 4656
HMS Note No. 149
Brightest emission patch near center of system and
approximately 18 arcsec [west] of the apparent nuclear region,
which is at the [south-west] end of the brighter half of the nebula.

10. 1918PLicO..13....9C
Re:NGC 4656
NGC 4656 and NGC 4657
These form a single nebula, 9' long by about 1' wide, in p.a. 33^deg^. The
northern end corresponds to 4567; is very bright; sharply curved, and shows
several almost stellar condensations. The southern half, southwest of the
apparent nucleus, is quite faint, as though obliterated by absorbing matter.
Description in 4656 in Bull. 219 in error.


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