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| Query : 2017A&A...606L...6Z |
2017A&A...606L...6Z - Astronomy and Astrophysics, volume 606L6-6 (2017/10-1)
Detection of a new methanol maser line with ALMA.
ZINCHENKO I., LIU S.-Y., SU Y.-N. and SOBOLEV A.M.
Abstract (from CDS):
Aims. We investigated the structure and kinematics of the gaseous disk and outflows around the massive young stellar object S255 NIRS3 in the S255IR-SMA1 dense clump.
Methods. Observations of the S255IR region were carried out with ALMA at two epochs in the compact and extended configurations.
Results. We serendipitously detected a new, never predicted, bright maser line at about 349.1GHz, which most probably represents the CH3OH 141-140 A–+ transition. The emission covers most of the 6.7GHz methanol maser emission area of almost 1'' and shows a velocity gradient in the same sense as the disk rotation. No variability was found in the time interval of several months. The emission is classified as Class II maser and probably originates in a ring at a distance of several hundred AU from the central star.
Methods. Observations of the S255IR region were carried out with ALMA at two epochs in the compact and extended configurations.
Results. We serendipitously detected a new, never predicted, bright maser line at about 349.1GHz, which most probably represents the CH3OH 141-140 A–+ transition. The emission covers most of the 6.7GHz methanol maser emission area of almost 1'' and shows a velocity gradient in the same sense as the disk rotation. No variability was found in the time interval of several months. The emission is classified as Class II maser and probably originates in a ring at a distance of several hundred AU from the central star.
Abstract Copyright: © ESO, 2017
Journal keyword(s): ISM: molecules - masers - ISM: individual objects: S255IR - ISM: individual objects: S255IR
Simbad objects: 7
| Number of rows : 7 |
| 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 B0507+179 | Bla | 05 10 02.36912937 | +18 00 41.5815635 | 20.0 | 19.0 | 19.09 | ~ | 470 | 1 | ||
| 2 | NAME S255-2 | IR | 06 12 53.8 | +17 59 22 | ~ | 49 | 0 | |||||
| 3 | MMB G192.600-00.048 | Y*O | 06 12 54.0100 | +17 59 23.200 | ~ | 430 | 0 | |||||
| 4 | IC 2162 | HII | 06 13 04.1 | +17 58 44 | ~ | 372 | 2 | |||||
| 5 | NVSS J061336+170825 | Rad | 06 13 36.36008547 | +17 08 24.9461742 | ~ | 25 | 1 | |||||
| 6 | QSO B0748+126 | Bla | 07 50 52.04573865 | +12 31 04.8282079 | 17.67 | 17.28 | 17.16 | ~ | 363 | 1 | ||
| 7 | PG 0851+202 | BLL | 08 54 48.8749846272 | +20 06 30.639583620 | 15.649 | 15.146 | 15.446 | ~ | 2513 | 1 |
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