2020MNRAS.491.4642M

Query : 2020MNRAS.491.4642M

2020MNRAS.491.4642M - Mon. Not. R. Astron. Soc., 491, 4642-4655 (2020/February-1)

Variability in extragalactic class I methanol masers: new maser components towards NGC 4945 and NGC 253.

McCARTHY T.P., ELLINGSEN S.P., BREEN S.L., VORONKOV M.A., CHEN X. and QIAO H.-H.

Abstract (from CDS):

We have used the Australia Telescope Compact Array (ATCA) to make new observations of the 36.2-GHz (4-1 - 30E) methanol transition towards NGC 4945 and NGC 253. These observations have revealed the presence of new maser components towards these galaxies, and have provided the first clear evidence for variability in extragalactic class I methanol masers. Alongside the new observations of NGC 4945 and NGC 253, we present the results of recent 36.2-GHz methanol maser searches towards 12 galaxies, placing upper limits on the emission from the 36.2-GHz class I transition and the 37.7-GHz (72 - 81E) class II maser line towards these sources. Flux density values for the 7-mm continuum emission towards these sources are also reported where applicable. A re-analysis of the published 36.2-GHz methanol observations of Arp 220 undertaken as part of the search revealed some issues with previous imaging procedures. The re-analysis, combined with non-detections in independent follow-up observations, suggests that there is no 36.2-GHz methanol emission towards Arp 220 stronger than 3.5 mJy in a 10 km s-1 channel (5σ upper limit).

Abstract Copyright: © 2019 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): masers - galaxies: starburst

Simbad objects: 42

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Number of rows : 42
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 M 31 AGN 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 13622 1
2 NGC 253 SyG 00 47 33.134 -25 17 19.68   8.03   6.94 8.1 ~ 3588 2
3 QSO B0116-219 Bla 01 18 57.26217841 -21 41 30.1402631   19.40 19.0 19.37   ~ 144 1
4 ZW III 35 Sy2 01 44 30.516 +17 06 09.18   15.24 14.81     ~ 261 1
5 Z 413-68 G 02 17 03.5780283096 +05 17 31.481644560   15.4       ~ 45 0
6 4C 06.11 Bla 02 24 28.42818961 +06 59 23.3415566   20.8 20.0 17.78   ~ 172 1
7 QSO B0237-2322 QSO 02 40 08.1743783856 -23 09 15.729012036   16.78 16.63     ~ 516 1
8 NGC 1052 Bla 02 41 04.79849989 -08 15 20.7519527 11.84 11.41 10.47 10.71   ~ 1397 2
9 M 77 Sy2 02 42 40.7091669408 -00 00 47.859690204 9.70 9.61 8.87 10.1 9.9 ~ 4897 2
10 NGC 1097 LIN 02 46 19.059 -30 16 29.68 10.46 9.97 9.48 8.72 9.8 ~ 1448 3
11 IC 342 AGN 03 46 48.514 +68 05 45.98   10.5       ~ 1579 1
12 2MFGC 3185 G 03 50 00.3507356160 -01 27 57.417475788   16.14   14.83   ~ 18 0
13 NGC 1792 Sy1 05 05 14.4036930408 -37 58 50.064531168   10.68 10.18 9.53 10.4 ~ 261 1
14 NGC 1808 Sy2 05 07 42.343 -37 30 46.98 11.05 10.80 9.94 9.36 10.2 ~ 756 3
15 ESO 362-21 BLL 05 22 57.98464178 -36 27 30.8512953   15.26 14.62 14.48   ~ 873 2
16 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
17 UGCA 116 AGN 05 55 42.645 +03 23 32.23 10.74 11.68 11.46   11.82 ~ 561 0
18 QSO J0650-1637 QSO 06 50 24.58185949 -16 37 39.7255562   22.09       ~ 125 1
19 ESO 558-9 G 07 04 21.002 -21 35 19.36           ~ 36 0
20 IC 2560 Sy2 10 16 18.7073057664 -33 33 49.720274676   12.53 13.31 11.25 12.2 ~ 283 1
21 NVSS J102000+081335 rG 10 20 00.1849825704 +08 13 33.648546108   17.5       ~ 167 1
22 QSO B1034-293 Bla 10 37 16.07974265 -29 34 02.8134977   16.46 16.46 17.54   ~ 358 1
23 QSO B1036+054 Bla 10 38 46.77987408 +05 12 29.0867216   20.21 19.45 19.53   ~ 111 1
24 QSO B1144-3755 BLL 11 47 01.37071212 -38 12 11.0235229   19.03 16.2 16.72   ~ 320 1
25 MCG-06-26-013 EmG 11 53 11.722 -39 07 48.72   13.30   11.86   ~ 203 1
26 3C 279 Bla 12 56 11.16657958 -05 47 21.5251510   18.01 17.75 15.87   ~ 3205 2
27 ESO 269-12 Sy2 12 56 40.5123469200 -46 55 34.274942184   14.72   13.54 13.9 ~ 65 0
28 NGC 4945 Sy2 13 05 27.279 -49 28 04.44   9.31 14.40 7.55   ~ 1582 2
29 NAME Centaurus A BLL 13 25 27.61521044 -43 01 08.8050291   8.18 6.84 6.66   ~ 4774 3
30 PMN J1326-5256 BLL 13 26 49.22911822 -52 56 23.6331968           ~ 74 1
31 NAME Circinus Galaxy Sy2 14 13 09.906 -65 20 20.47   10.89 9.84 10.6 10.0 ~ 1331 1
32 PMN J1417-5950 Rad 14 17 41.63552 -59 50 37.6086           ~ 8 1
33 NGC 5765B Sy2 14 50 51.50555 +05 06 52.1550   14.6       ~ 80 1
34 NGC 5793 Sy2 14 59 24.807 -16 41 36.55   14.47 13.32 12.77   ~ 147 1
35 QSO J1512-0906 Bla 15 12 50.53293048 -09 05 59.8297908   16.74 16.54     ~ 1409 1
36 IC 1127 SyG 15 34 57.22396 +23 30 11.6084   14.76 13.88     ~ 3090 4
37 QSO B1921-293 BLL 19 24 51.05595254 -29 14 30.1210248   18.71 18.21 15.07   ~ 918 1
38 ICRF J193925.0-634245 Sy2 19 39 25.0245304992 -63 42 45.640373400   18.87 18.37 17.64   ~ 1332 2
39 NGC 6946 H2G 20 34 52.332 +60 09 13.24   10.5       ~ 2661 2
40 Z 448-20 G 20 57 23.62800 +17 07 44.5980   15.2       ~ 190 0
41 QSO J2123+0535 Bla 21 23 44.51739933 +05 35 22.0930238   18.3 20.40 19.86   ~ 320 1
42 NAME TXFS 2226-1821 Sy2 22 29 12.4915751904 -18 10 47.242352208   16.92   15.73   ~ 65 1

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