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-42
J012230.24+084540.9
NGC0502-40 [internal use only]

Coordinates   [GALFIT]:
Equitorial 20.626020 8.761350 [deg]
01:22:30.2448 +08:45:40.8612 [hms dms]
Galactic 135.854691 -53.329128 [deg]

Morph: dI
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]
NGC0502 g 7 2415 0.82 688.00 Full Field
r 7 2415 0.79 981.29
i 7 1610 0.66 1626.29

Distance Estimates

Source Measurement Notes Dist
ALFALFA HI v=2423.00±15.000 km/s SNR = 10.70 dhf = 33.46 Mpc


Magnitudes

Galfit magnitudes
g 17.30
r 16.87
i 16.70
Extinction: SDSS MegaCam
g 0.11 0.11
r 0.08 0.08
i 0.06 0.06
SDSS values from IRSA, MegaCam values transformed following Gwyn 2008.
Surface Brightness
μ0 24.04
μRe 25.42
⟨ μRe ⟩ 24.82

Structural Parameters


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

Data Unbinned
Sersic Index 0.60
Effective Radius [arcsec]21.19
Axis Ratio 0.67
Position Angle -46.01

HI Data

ALFALFA
W50 [km/s]27.0000
SNR10.70
Derived Parameters:
FHI [Jy-km/s]0.5800 ± 0.05
logMHI [M☉]8.18 ± 0.06
logMdyn [M☉]9.00
MHI/LB1.9300

Globular Clusters

Globular cluster candidates within 105.95 arcsec (5Re) of the dwarf:

ID RA, Dec Gaia SepSepg (g-r) (g-i) (u-g) IC
Flag [''][1/Re]
1 20.642961, 8.774786 0 77.283.6521.97±0.010.45±0.010.59±0.01 -- 0.03
2 20.603830, 8.745170 0 98.124.6324.44±0.050.75±0.060.97±0.08 -- -0.06

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] ['']
NGC0502 18.36 ETG 36 2524 12 10.53
NGC0489 28.18 LTG 36 2507 11 10.60
NGC0509 42.46 ETG 32 2261 23 10.07
NGC0518 43.25 LTG 39 2725 18 10.58
NGC0532 51.11 LTG 34 2361 28 10.85
NGC0516 53.21 ETG 35 2437 14 10.20
NGC0524 57.68 ETG 23 2403 44 11.20
NGC0525 66.58 ETG 31 2139 11 10.06
NGC0522 81.21 LTG 39 2725 23 10.72
NGC0485 105.74 LTG 32 2247 19 10.00