2015ApJ...805..129K

Query : 2015ApJ...805..129K

2015ApJ...805..129K - Astrophys. J., 805, 129 (2015/June-1)

First parallax measurements towards a 6.7 GHz methanol maser with the australian long baseline array - distance to G 339.884-1.259.

KRISHNAN V., ELLINGSEN S.P., REID M.J., BRUNTHALER A., SANNA A., McCALLUM J., REYNOLDS C., BIGNALL H.E., PHILLIPS C.J., DODSON R., RIOJA M., CASWELL J.L., CHEN X., DAWSON J.R., FUJISAWA K., GOEDHART S., GREEN J.A., HACHISUKA K., HONMA M., MENTEN K., SHEN Z.Q., VORONKOV M.A., WALSH A.J., XU Y., ZHANG B. and ZHENG X.W.

Abstract (from CDS):

We have conducted the first parallax and proper motion measurements of 6.7 GHz methanol maser emission using the Australian Long Baseline Array. The parallax of G 339.884-1.259 measured from five epochs of observations is 0.48±0.08 mas, corresponding to a distance of 2.1–0.3+0.4 kpc, placing it in the Scutum spiral arm. This is consistent (within the combined uncertainty) with the kinematic distance estimate for this source at 2.5±0.5 kpc using the latest Solar and Galactic rotation parameters. We find from the Lyman continuum photon flux that the embedded core of the young star is of spectral type B1, demonstrating that luminous 6.7 GHz methanol masers can be associated with high-mass stars toward the lower end of the mass range.

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Journal keyword(s): astrometry - Galaxy: kinematics and dynamics - masers - stars: formation

Simbad objects: 16

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Number of rows : 16
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 QSO B0013-005 Bla 00 16 11.08855044 -00 15 12.4454125   20.44 19.98 19.72   ~ 171 1
2 NAME W 3 OH HII 02 27 04.1 +61 52 22           ~ 1064 2
3 QSO B0537-441 BLL 05 38 50.36155950 -44 05 08.9390233   15.77 16.48 16   ~ 924 2
4 OHIO N 001 Rad 12 03 08.09 +07 15 30.1           ~ 23 1
5 NAME NGP reg 12 51 26.275 +27 07 41.70           ~ 1274 0
6 QSO J1305-1033 Bla 13 05 33.0150535680 -10 33 19.430383680   15.18 15.23 14.46   ~ 624 1
7 ICRF J135256.5-441240 BLL 13 52 56.53494646 -44 12 40.3876155   16.95 16.37     ~ 129 3
8 OH 339.88-01.26 Y*O 16 52 04.6776 -46 08 34.404           ~ 119 1
9 QSO J1654-4812 QSO 16 54 18.2448 -48 13 03.756           ~ 1 0
10 QSO J1706-4600 QSO 17 06 22.05010 -46 00 17.8247           ~ 8 1
11 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 16269 0
12 W 49n HII 19 10 13.2 +09 06 12           ~ 497 3
13 OH 043.796-00.127 Mas 19 11 53.9868 +09 35 50.325           ~ 89 0
14 NVSS J193124+224332 Rad 19 31 24.91677020 +22 43 31.2585148           ~ 35 1
15 NAME Scutum Spiral Arm PoG ~ ~           ~ 393 0
16 NAME Galactic Bar reg ~ ~           ~ 1458 0

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