2021MNRAS.506.4175M

Query : 2021MNRAS.506.4175M

2021MNRAS.506.4175M - Mon. Not. R. Astron. Soc., 506, 4175-4187 (2021/September-3)

Massive protocluster of a periodic maser source G188.95+0.89.

MUTIE M.M., CHIBUEZE J.O., EL BOUCHEFRY K., MacLEOD G.C., MORGAN J. and BAKI P.

Abstract (from CDS):

We report the results of ongoing monitoring of the 6.7 GHz CH3OH masers associated with G188.95+0.89. In these observations, five features are periodically varying and at least two exhibit evidence of velocity drifts. It is not clear the cause of these velocity drifts. The spectra have varied significantly since detection in 1991. The 11.45 km s–1 feature has decreased exponentially from 2003. Complementary ALMA 1.3-mm continuum and line observational results are also presented. Eight continuum cores (MM1-MM8) were detected in G188.95+0.89. We derived the masses of the detected cores. G188.95+0.89 MM2 was resolved into two continuum cores (separated by 0.1 arcsec) in ALMA band 7 observations. Also, CH3OH (4_(2, 2)–3(1, 2)_) thermal emission associated with MM2 is double peaked. We propose the presence of multiple (at least binary) young stellar objects in MM2. SiO emission exhibits a bow-shock morphology in MM2 while strong emission of 12CO at the east and west of MM2 suggests the presence of an east-west bipolar outflow.

Abstract Copyright: © 2021 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society

Journal keyword(s): masers - techniques: interferometric - stars: formation - ISM: individual objects: G188.95+0.89 - ISM: molecules - radio lines:stars

Nomenclature: Fig. 5, Table 3: [MCE2021] G188.95+00.89 MMN (Nos MM1-MM8).

Simbad objects: 22

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Number of rows : 22
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 NAME Per Arm PoG 03 30 +45.0           ~ 1672 0
2 NAME Per B SyG 04 37 04.37535450 +29 40 13.8179631   21.7       ~ 533 2
3 QSO B0507+179 Bla 05 10 02.36912937 +18 00 41.5815635   20.0 19.0 19.09   ~ 470 1
4 4C 22.12 BLL 06 03 51.55701163 +21 59 37.6988226           ~ 42 1
5 [MBH2005] G188.95+0.89 MM 2 Cld 06 08 52.2 +21 38 13           ~ 5 0
6 [MBH2005] G188.95+0.89 MM 1 Cld 06 08 52.8 +21 38 37           ~ 8 0
7 [MCE2021] G188.95+00.89 MM4 cor 06 08 52.86 +21 38 29.5           ~ 2 0
8 [MCE2021] G188.95+00.89 MM8 cor 06 08 52.97 +21 38 11.1           ~ 2 0
9 [MCE2021] G188.95+00.89 MM7 cor 06 08 53.23 +21 38 09.7           ~ 2 0
10 [MCE2021] G188.95+00.89 MM1 cor 06 08 53.33 +21 38 28.9           ~ 3 0
11 [MCE2021] G188.95+00.89 MM5 cor 06 08 53.35 +21 38 11.6           ~ 1 0
12 [MCE2021] G188.95+00.89 MM6 cor 06 08 53.42 +21 38 13.7           ~ 2 0
13 [MCE2021] G188.95+00.89 MM2 cor 06 08 53.49 +21 38 30.5           ~ 2 0
14 [MCE2021] G188.95+00.89 MM3 cor 06 08 54.13 +21 38 34.4           ~ 2 0
15 RAFGL 5180 SFR 06 08 54.1 +21 38 25           ~ 125 0
16 MMB G192.600-00.048 Y*O 06 12 54.0100 +17 59 23.200           ~ 430 0
17 QSO B0748+126 Bla 07 50 52.04573865 +12 31 04.8282079   17.67 17.28 17.16   ~ 363 1
18 MCG-02-24-007 LIN 09 18 05.66848602 -12 05 43.8060823   14.38 14.8     ~ 1077 1
19 IRAS 15254-5621 Y*? 15 29 19.33 -56 31 22.8           ~ 108 0
20 NAME NGC 6334-I Cl* 17 20 53.35 -35 47 01.5           ~ 373 0
21 MMB G358.931-00.030 SFR 17 43 10.02 -29 51 45.8           ~ 70 0
22 NAME Cepheus A SFR 22 56 17.9 +62 01 49           ~ 760 2

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