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-1337
J122018.73+280132.6
NGC4251-47 [internal use only]

Coordinates   [GALFIT]:
Equitorial 185.078033 28.025709 [deg]
12:20:18.7279 +28:01:32.5524 [hms dms]
Galactic 203.726456 83.045723 [deg]

Morph: dIN
Notes: This galaxy is a UDG candidate.

This galaxy can be found in the following image:

Field Filter Nexp Texp IQ Background Image Link
[s] [''] [ADUs]
NGC4251 g 7 2415 1.08 803.00 Full Field

Distance Estimates

Source Measurement Notes Dist
ALFALFA HI v=2291.00±5.000 km/s SNR = 13.90 dhf = 35.95 Mpc


Magnitudes

Galfit magnitudes
g 18.51
Extinction: SDSS MegaCam
g 0.07 0.07
r 0.05 0.05
i 0.04 0.04
SDSS values from IRSA, MegaCam values transformed following Gwyn 2008.
Surface Brightness
μ0 23.85
μRe 25.23
⟨ μRe ⟩ 24.63

Structural Parameters


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

Data Unbinned
Sersic Index 0.77
Effective Radius [arcsec]11.08
Axis Ratio 0.64
Position Angle -72.76

Properties of the nucleus

RA, Dec [deg]185.0781, 28.0257
offset [arcsec]0.25
mg22.39

HI Data

ALFALFA
W50 [km/s]36.0000
SNR13.90
Derived Parameters:
FHI [Jy-km/s]0.6500 ± 0.04
logMHI [M☉]8.30 ± 0.05
logMdyn [M☉]9.98
MHI/LB-9.9900

Globular Clusters

No globular cluster candidates found within 55.4 arcsec (5*Re) of the dwarf.

Note: we are missing GC data for the field NGC4251 (only g-band available at full res.).

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] ['']
IC0777 20.91 LTG 39 2541 9 10.08
NGC4275 24.97 LTG 36 2312 17 10.35
PGC039691 29.53 LTG 37 2401 6 9.92
NGC4251 30.13 ETG 19 1066 19 10.78
NGC4278 75.34 ETG 16 620 32 10.83
NGC4283 77.11 ETG 15 1056 12 10.03
NGC4274 95.54 LTG 15 930 56 10.82
NGC4245 101.35 LTG 12 884 28 10.18
NGC4314 115.9 LTG 16 963 39 10.71
NGC4150 191.34 ETG 13 208 16 9.97