MATLAS dwarfs - properties of individual galaxies



dwarf, stretch 1, BW dwarf, stretch 2, color dwarf, stretch 3, BW The galaxy at three different stretches.


Basic Information

IDs: MATLAS-951
J112031.83+031359.6
NGC3640-104 [internal use only]

Coordinates   [GALFIT]:
Equitorial 170.132629 3.233233 [deg]
11:20:31.8298 +03:13:59.6369 [hms dms]
Galactic 256.717926 57.703869 [deg]

Morph: dEN
Notes: This galaxy is a UDG candidate.
This galaxy shows tidal features (may not be visible in cutouts).

This galaxy can be found in the following image:

Field Filter Nexp Texp IQ Background Image Link
[s] [''] [ADUs]
NGC3640 g 7 2415 0.65 781.29 Full Field
r 7 2415 0.84 1008.43
i 7 1610 0.45 1116.86

Distance Estimates

No distance estimates have been found.
We have assumed the dwarf is a satellite of NGC3640 at a distance of 26 Mpc.

Magnitudes

Galfit magnitudes
g 18.02
r 17.29
i 16.90
Extinction: SDSS MegaCam
g 0.15 0.14
r 0.11 0.10
i 0.08 0.08
SDSS values from IRSA, MegaCam values transformed following Gwyn 2008.
Surface Brightness
μ0 25.72
μRe 27.10
⟨ μRe ⟩ 26.50

Structural Parameters


Galfit modeling, input
  Cleaned input image
Galfit modeling, model
  Galfit model
Galfit modeling, residual
  Residual image

Data Unbinned
Sersic Index 0.71
Effective Radius [arcsec]22.39
Axis Ratio 0.49
Position Angle -73.51

Properties of the nucleus

RA, Dec [deg]170.1325, 3.2329
offset [arcsec]1.20

The nucleus was not well modeled by Galfit. However, the coordinates were either: (a) extracted from Galfit if the model was centered, or (b) determined manually with ds9.

HI Data

No HI data was found for this dwarf.

Globular Clusters

Globular cluster candidates within 111.95 arcsec (5Re) of the dwarf:

ID RA, Dec Gaia SepSepg (g-r) (g-i) (u-g) IC
Flag [''][1/Re]
1 170.126712, 3.235781 0 23.161.0324.23±0.040.70±0.060.83±0.06 -- 0.03
2 170.122655, 3.227092 0 42.051.8823.15±0.020.48±0.020.71±0.02 -- 0.07
3 170.142998, 3.223231 1 51.792.3120.77±0.000.70±0.000.94±0.00 -- 0.00
4 170.142602, 3.219575 0 60.812.7222.46±0.010.86±0.011.22±0.01 -- 0.00
5 170.134542, 3.252362 0 69.283.0924.36±0.040.55±0.070.72±0.07 -- 0.03
6 170.110983, 3.242349 0 84.443.7720.81±0.000.66±0.000.84±0.00 -- 0.01
7 170.152496, 3.216571 0 93.244.1622.43±0.010.61±0.010.86±0.01 -- -0.01

Local Environment

The ten nearest on-sky neighbors from ATLAS3D parent (ETG+LTG) catalog:

Galaxy separation Morph Dist Vel Re log(M*/M☉)
['] [Mpc] [km/s] ['']
NGC3640 8.74 ETG 26 1298 31 11.15
NGC3641 9.51 ETG 26 1780 9 10.05
NGC3630 16.56 ETG 25 1499 13 10.58
NGC3633 21.18 LTG 38 2600 11 10.53
NGC3611 91.36 LTG 39 1585 17 10.71
UGC06402 252.82 LTG 38 2608 10 9.98
NGC3495 289.37 LTG 17 1130 44 10.22
NGC3521 295.26 LTG 8 801 60 10.80
IC0676 368.51 ETG 25 1429 22 10.22
NGC3705 389.78 LTG 24 1018 37 10.90