NGC 0101 – connection to high-z object

I haven’t found any previous mentions of this system as a discordant redshift system. Very close to NGC 0101 (object 1 in Figure 1 and 3) there is a higher redshift object (object 2). Figure 2 shows DSS image of the situation with these two objects. Image has been zoomed in (4x) and adjusted for brightness and contrast in order to bring out faint features. Between objects 1 and 2 there is an obvious apparent luminous connection. It should be noted that NGC 0101 has lot of arms and filaments around it, so it doesn’t seem surprising if some nearby object would happen to be positioned so that it would appear to be connected. It would be very interesting to see a better image of this system. Redshift difference between NGC 0101 and object 2 is so large that it doesn’t seem possible to explain the situation with redshift difference being caused by real peculiar velocities.

ngc0101close
Figure 1. Close-up image of NGC 0101. Image is from Digitized Sky Survey (POSS2/UKSTU Red), and it has been zoomed in (4x) and adjusted for brightness and contrast to bring out the faint features in the field.

Objects 7 and 9 (see Figure 3) are very close to each other but have different redshifts. I tried to adjust the brightness and contrast of the DSS image but I couldn’t bring out any signs of bridge between them. My image is presented in Figure 2. However, the image in NED suggest that there is a possibility of a bridge between them (save the NED image and then adjust it for brightness and contrast, there seems to be a quite strong apparent bridge which doesn’t seem to be a noise artifact).

ngc0101_7_9
Figure 2. Close-up image of a field near NGC 0101. Image is from Digitized Sky Survey (POSS2/UKSTU Red), and it has been zoomed in (4x) and adjusted for brightness and contrast to bring out the faint features in the field. Object 7 is at the center, and object 9 is right beside it.

Objects 14 and 18 are quite well aligned across NGC 0101. Their redshifts are quite different, but their angular distance from NGC 0101 is somewhat similar. Other possibility is that objects 14 and 7 are aligned across NGC 0101. In that case the objects would have quite similar redshifts. However, for object 7, more interesting pair is object 4, because they have almost the same redshift (cz difference is only 140 km/s) and are still aligned quite well. Their angular distance from NGC 0101 is also quite similar. Object 10 also has the same redshift than objects 4 and 7. Object 10 is located near object 7, so they are an apparent galaxy pair.

There are quite a lot of objects with measured redshifts within this field. That is because the field belongs to 2dF coverage area. However, the distribution of objects with measured redshifts in the field is quite one-sided. It might be that 2dF coverage area ends there or has a hole there.

ngc0101
Figure 3. The objects with measured redshifts near of NGC 0101. Size of the image is 15 x 15 arcmin. Image is from Digitized Sky Survey (POSS2/UKSTU Red), and it has been adjusted for brightness and contrast to bring out the faint objects in the field.

Objects and their data

NBR NAME TYPE REDSHIFT (cz) MAG SEPARATION
1 NGC 0101 SABc 0.011284 (3383 km/s) 13.46 0
2 2dFGRS S438Z082 galaxy 0.162700 18.88 1.087
3 2dFGRS S438Z084 galaxy 0.134500 19.10 2.828
4 2dFGRS S438Z078 galaxy 0.051500 19.48 3.163
5 2dFGRS S498Z148 galaxy 0.250800 19.11 3.455
6 2dFGRS S438Z071 galaxy 0.138800 19.27 3.803
7 2dFGRS S438Z089 galaxy 0.051300 18.36 3.835
8 2dFGRS S438Z073 galaxy 0.171100 19.35 3.971
9 2dFGRS S498Z153 galaxy 0.184700 19.09 4.023
10 2dFGRS S498Z154 galaxy 0.051500 17.64 4.621
11 2dFGRS S438Z075 galaxy 0.111600 18.07 5.043
12 2dFGRS S438Z076 galaxy 0.194200 19.41 5.751
13 2dFGRS S498Z152 galaxy 0.251300 19.35 5.799
14 2dFGRS S438Z072 galaxy 0.041000 18.14 6.399
15 2dFGRS S498Z135 galaxy 0.124000 17.52 6.511
16 2dFGRS S438Z081 galaxy 0.266200 19.44 7.156
17 2dFGRS S438Z079 galaxy 0.111700 18.94 7.188
18 2dFGRS S498Z157 galaxy 0.107500 18.49 7.259
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