2014MNRAS.437.1808G

Query : 2014MNRAS.437.1808G

2014MNRAS.437.1808G - Mon. Not. R. Astron. Soc., 437, 1808-1820 (2014/January-2)

Periodicity in Class II methanol masers in high-mass star-forming regions.

GOEDHART S., MASWANGANYE J.P., GAYLARD M.J. and VAN DER WALT D.J.

Abstract (from CDS):

We report the results of 10 years of monitoring of six regularly varying 6.7GHz methanol masers using the Hartebeesthoek 26-m telescope. Observations were done at intervals of 1-2 weeks, with faster sampling during flaring episodes. Four of the sources were also monitored at 12.2GHz and show correlated variations. We find the Lomb-Scargle periodogram to be the most sensitive method to search for periodicity but possibly prone to false detections. Periods range from 132.8d (with 26 cycles observed) to 509d (with seven cycles observed). Five of the sources show arguably periodic variations, while G331.13-0.24 shows strong periodicity in one peak, with large and variable delays in other peaks.

Abstract Copyright: © 2013 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2013)

Journal keyword(s): masers - stars: formation - ISM: clouds - Hii regions - Radio lines: ISM

CDS comments: G328.254-0.547 is a misprint for G328.254-0.532. In References, the bibcode for Goedhart et al. 2003 is 2003MNRAS.339L..33G.

Simbad objects: 21

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Number of rows : 21
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 B SyG 04 37 04.37535450 +29 40 13.8179631   21.7       ~ 533 2
2 [MBH2005] G188.95+0.89 MM 1 Cld 06 08 52.8 +21 38 37           ~ 8 0
3 NAME AFGL 5180 Cluster Cl* 06 08 54 +21 38.4           ~ 7 0
4 RAFGL 5180 SFR 06 08 54.1 +21 38 25           ~ 125 0
5 NGC 2175 OpC 06 09 39 +20 29.2   7.0 6.8     ~ 270 3
6 MMB G196.454-01.677 Mas 06 14 37.03 +13 49 36.6           ~ 17 0
7 MCG-02-24-007 LIN 09 18 05.66848602 -12 05 43.8060823   14.38 14.8     ~ 1077 1
8 M 87 AGN 12 30 49.42338414 +12 23 28.0436859 10.16 9.59 8.63   7.49 ~ 7815 3
9 GAL 316.64-00.09 HII 14 44 20.5 -59 55 21           ~ 8 0
10 OH 328.24-00.55 Mas 15 57 58.28 -53 59 22.7           ~ 38 0
11 OH 328.25-00.53 Mas 15 57 59.75 -53 58 00.4           ~ 69 0
12 IRAS 15541-5349 Y*? 15 57 59.827 -53 58 00.48           ~ 78 0
13 IRAS 16071-5142 HII 16 11 00 -51 50.3           ~ 40 0
14 OH 339.6-00.1 Y*O 16 46 05.99 -45 36 43.3           ~ 86 0
15 NAME NGC 6334F (C) HII 17 20 53.45 -35 47 02.6           ~ 244 1
16 IRAS 17233-3606 HII 17 26 42.8 -36 09 17           ~ 98 0
17 GAL 009.62+00.19 HII 18 06 13.9 -20 31 44           ~ 226 0
18 [GRM93] G09.61+0.20 E HII 18 06 14.7 -20 31 32           ~ 51 0
19 GAL 012.89+00.49 HII 18 11 51.3 -17 31 29           ~ 217 0
20 GAL 022.357+00.066 HII 18 31 44.9 -09 22 09           ~ 55 0
21 IRAS 18566+0408 Y*O 18 59 09.95520 +04 12 15.6240           ~ 143 0

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