J/ApJS/239/15 Accurate OH maser positions. II. The GC. (Qiao+, 2018)
Accurate OH maser positions.
II. The Galactic Center region.
Qiao H.-H., Walsh A.J., Breen S.L., Gomez J.F., Dawson J.R., Imai H.,
Ellingsen S.P., Green J.A., Shen Z.-Q.
<Astrophys. J. Suppl. Ser., 239, 15 (2018)>
=2018ApJS..239...15Q 2018ApJS..239...15Q
ADC_Keywords: Galactic center; Masers; Radio lines
Keywords: catalogs; ISM: molecules; masers; radio lines: ISM;
stars: AGB and post-AGB; stars: formation
Abstract:
We present high spatial resolution observations of ground-state OH
masers achieved using the Australia Telescope Compact Array (ATCA).
These observations were conducted toward 171 pointing centers where OH
maser candidates were identified previously in the Southern Parkes
Large-Area Survey in Hydroxyl (SPLASH) toward the Galactic center
region between Galactic longitudes of 355* and 5* and Galactic
latitudes of -2° and +2°. We detect maser emission toward 162
target fields and suggest that six out of nine nondetections are due
to intrinsic variability. Due to the superior spatial resolution of
the follow-up ATCA observations, we have identified 356 OH maser sites
in the 162 target fields with maser detections. Almost half (161 of
356) of these maser sites have been detected for the first time in
these observations. After comparing the positions of these 356 maser
sites to the literature, we find that 269 (76%) sites are associated
with evolved stars (two of which are PNe), 31 (9%) are associated with
star formation, and four are associated with supernova remnants; we
were unable to determine the origin of the remaining 52 (15%) sites.
Unlike the pilot region, the infrared colors of evolved star sites
with symmetric maser profiles in the 1612MHz transition do not show
obvious differences compared with those of evolved star sites with
asymmetric maser profiles.
Description:
Observations were conducted with the Australia Telescope Compact Array
(ATCA) over five separate observing sessions on 2015 March 7-8, 2015
May 22, 2016 February 18-24, 2016 February 26-28, and 2016 March 4
using the array configurations 6C, 1.5C, 6B, 6B, and 6B, respectively.
The resultant synthesized beam typically fell in the range from 13"x4.5"
to 20"x7".
For these observations, we concatenated zoom bands to give fine
spectral resolution across broader bandwidths, mostly using seven
bands for the 1612MHz OH masers and three bands for each of the 1665,
1667, and 1720MHz OH masers. See section 2 for further details.
The Southern Parkes Large-Area Survey in Hydroxyl (SPLASH)
simultaneously observed all four ground-state OH transitions in an
unbiased way (Dawson+ 2014MNRAS.439.1596D 2014MNRAS.439.1596D) using the CSIRO Australia
Telescope National Facility (ATNF) Parkes 64m telescope.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 113 934 Details of the 356 OH maser sites, derived
from the ATCA observations
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See also:
VIII/96 : 6-GHz methanol multibeam maser catalogue (Caswell+, 2010-12)
J/A+AS/76/205 : Variables and Nebulae in Sgr B (Terzan+ 1988)
J/A+AS/90/327 : 1612MHz OH survey of IRAS sources (te Lintel Hekkert+ 1991)
J/A+AS/92/43 : Radio Obs. of OH/IR stars close to the GC (Lindqvist+ 1992)
J/A+A/277/453 : OH maser survey of cool IRAS sources (David+ 1993)
J/A+AS/111/237 : OH detections from circumstellar shells (Lewis+, 1995)
J/A+AS/122/79 : Galactic Bulge Region OH 1612MHz survey. I. (Sevenster+ 1997)
J/A+AS/124/509 : ATCA/VLA OH 1612 MHz survey. II. (Sevenster+ 1997)
J/A+AS/128/35 : New Sample of OH/IR stars (Sjouwerman+ 1998)
J/A+A/362/215 : IJKs phot. of Galactic bulge variables (Schultheis+, 2000)
J/MNRAS/321/77 : Large-amplitude variables near the GC (Glass+, 2001)
J/A+A/366/481 : ATCA/VLA OH 1612 MHz survey. III. (Sevenster+, 2001)
J/A+A/373/536 : New galactic bulge PNe (van de Steene+, 2001)
J/A+A/393/115 : 86GHz SiO maser survey of late-type stars (Messineo+, 2002)
J/A+A/391/967 : H2O and SiO masers in the Galactic center (Sjouwerman+, 2002)
J/A+A/403/943 : Mass-loss rates of galactic AGB stars (Le Bertre+, 2003)
J/A+A/405/531 : IR sp. of ISOGAL sources in Galactic Bulge (Schultheis+, 2003)
J/ApJS/155/595 : OH maser IRAS and MSX observations (Deacon+, 2004)
J/PASJ/56/765 : SiO maser survey of IRAS sources (Deguchi+, 2004)
J/A+A/419/563 : Planetary nebulae near the Galactic Center (Jacoby+, 2004)
J/A+A/413/1037 : J-K DENIS phot. of bright southern stars (Kimeswenger+ 2004)
J/A+A/418/103 : 86GHz SiO maser survey in the Inner Galaxy (Messineo+, 2004)
J/AJ/128/1646 : The Galactic Center region at 330MHz (Nord+, 2004)
J/MNRAS/364/117 : OGLE2 Mira variables in the Galactic bulge (Matsunaga+, 2005)
J/A+A/435/575 : SiO maser survey of late-type stars. III (Messineo+, 2005)
J/PASJ/58/529 : SiO Maser Survey in Galactic Bulge (Fujii+, 2006)
J/A+A/458/173 : Optical spectroscopy of 253 IRAS sources (Suarez+, 2006)
J/A+A/465/865 : OH masers towards high mass protostellar object (Edris+, 2007)
J/AJ/136/2391 : GLIMPSE Extended Green Objects catalog (Cyganowski+, 2008)
J/AJ/136/2413 : Galactic midplane Spitzer red sources (Robitaille+, 2008)
J/A+A/496/813 : Binary PNe towards the Galactic bulge (Miszalski+, 2009)
J/ApJ/702/178 : YSOs in the central 400pc of the Galaxy (Yusef-Zadeh+, 2009)
J/AJ/145/22 : Simultaneous SiO and H2O maser observations (Kim+, 2013)
J/ApJS/208/11 : The Red MSX Source Survey: massive protostars (Lumsden+, 2013)
J/AcA/63/21 : VI light curves of Galactic LPVs (Soszynski+, 2013)
J/MNRAS/442/2240 : Accurate water maser positions from HOPS (Walsh+, 2014)
J/A+A/578/A119 : Water maser emission toward post-AGB and PN (Gomez+, 2015)
J/ApJS/227/26 : ATCA obs. of ground-state OH masers (Qiao+, 2016)
J/A+A/606/A126 : Orion Source I 3mm SiO maser emission (Issaoun+, 2017)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 3 I3 --- Seq [1/356] Figure number; column added by CDS
5- 24 A20 --- Name Identifier (GLLL.lll+B.bbb-ffffA) (1)
26- 27 I2 h RAh [17/18] Hour of Right Ascension (J2000)
29- 30 I2 min RAm Minute of Right Ascension (J2000)
32- 37 F6.3 s RAs Second of Right Ascension (J2000)
39 A1 --- DE- [-] Sign of the Declination (J2000)
40- 41 I2 deg DEd [23/33] Degree of Declination (J2000)
43- 44 I2 arcmin DEm Arcminute of Declination (J2000)
46- 50 F5.2 arcsec DEs Arcsecond of Declination (J2000)
52- 57 F6.2 Jy PFlux [0.2/286] Peak flux density
59- 64 F6.2 Jy.km/s IFlux [0.07/788] Integrated flux density
66- 71 F6.1 km/s PkVel [-356/327] Peak velocity
73- 78 F6.1 km/s minVel [-358/326] Minimum velocity
80- 85 F6.1 km/s maxVel [-356/328] Maximum velocity
87- 90 F4.2 arcsec ebmin [0.03/3] Relative uncertainty in minor axis
92- 96 F5.2 arcsec eamaj [0.07/11] Relative uncertainty in major axis
98-102 F5.1 deg ePA [-26/19] Uncertainty in position angle
104-109 A6 --- Comm Comments (2)
111-113 A3 --- Ref Reference (3)
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Note (1): Obtained from the Galactic coordinates of the accurate positions,
followed by the frequency of the detected OH transition and a letter
to denote the sequence of maser spots in the spectrum.
Note (2): The astrophysical identification of each maser site, followed by
the reason for the identification (see Section 3.2). Maser sites
with unknown associations are listed as U. The rest of this column
is formatted as "Assignment-Reason", where "Assignment" can be
SF - star formation, ES - evolved star, PN - planetary nebula or
SN - supernova remnants. "Reason" can be:
MMB = association with a class II methanol maser site which indicates
the presence of a high-mass star Breen+ (2013MNRAS.435..524B 2013MNRAS.435..524B),
based on the Methanol Multibeam survey
(Caswell+ 2010MNRAS.303.1029C 2010MNRAS.303.1029C);
HOP = based on HOPS identification (Walsh+ 2014, J/MNRAS/442/2240);
VIS = based on visual check on the GLIMPSE or WISE image together
with spectral features;
or based on identifications found through a search of SIMBAD:
LEB = Le Bertre et al. (2003, J/A+A/403/943);
SAM = Samus et al. (2003AstL...29..468S 2003AstL...29..468S);
TER = Terzan & Ounnas (1998A&AS...76..205T 1998A&AS...76..205T);
SC1 = Schultheis et al. (2003, J/A+A/405/531);
SC2 = Schultheis et al. (2000, J/A+A/362/215);
SOS = Soszynski et al. (2013, J/AcA/63/21);
LIN = Lindqvist et al. (1992, J/A+AS/92/43);
TEL = te Lintel Hekkert et al. (1991, J/A+AS/90/327);
ZIJ = Zijlstra et al. (1989A&A...217..157Z 1989A&A...217..157Z);
YUS = Yusef-Zadeh et al. (2009, J/ApJ/702/178);
BOW = Bowers (1978A&A....64..307B 1978A&A....64..307B);
VAN = Van de Steene & Jacoby (2001, J/A+A/373/536);
BUR = van Buren et al. (1990ApJ...353..570V 1990ApJ...353..570V);
HAB = Habing et al. (1983A&A...128..230H 1983A&A...128..230H);
SEV = Sevenster et al. (1997, J/A+AS/122/79);
GOM = Gomez et al. (2008AJ....135.2074G 2008AJ....135.2074G);
KIM = Kimeswenger et al. (2004, J/A+A/413/1037);
MAT = Matsunaga et al. (2005, J/MNRAS/364/117);
MES = Messineo et al. (2002, J/A+A/393/115);
SLO = Sloan et al. (2010ApJ...719.1274S 2010ApJ...719.1274S);
SUA = Suarez et al. (2006, J/A+A/458/173);
TAF = Tafoya et al. (2009ApJ...691..611T 2009ApJ...691..611T);
ARG = Argon et al. (2000ApJS..129..159A 2000ApJS..129..159A);
WYZ = Wardle & Yusef-Zadeh (2002Sci...296.2350W 2002Sci...296.2350W);
YU1 = Yusef-Zadeh et al. (1999ApJ...512..230Y 1999ApJ...512..230Y).
Note (3): Maser sites discovered by the SPLASH survey are listed as "N" for new.
The remaining maser sites are tabulated with references to previous
observations. Code as follows:
S97 = Sevenster et al. (1997, J/A+AS/122/79);
C98 = Caswell (1998MNRAS.297..215C 1998MNRAS.297..215C);
C81 = Caswell et al. (1981AuJPh..34..333C 1981AuJPh..34..333C);
F96 = Frail et al. (1996AJ....111.1651F 1996AJ....111.1651F);
Y95 = Yusef- Zadeh et al. (1995Sci...270.1801Y 1995Sci...270.1801Y);
L92 = Lindqvist et al. (1992, J/A+AS/92/43);
T91 = te Lintel Hekkert et al. (1991, J/A+AS/90/327);
Z89 = Zijlstra et al. (1989A&A...217..157Z 1989A&A...217..157Z);
Y96 = Yusef-Zadeh et al. (1996ApJ...466L..25Y 1996ApJ...466L..25Y);
Y99 = Yusef-Zadeh et al. (1999ApJ...512..230Y 1999ApJ...512..230Y);
A00 = Argon et al. (2000ApJS..129..159A 2000ApJS..129..159A);
H83 = Habing et al. (1983A&A...128..230H 1983A&A...128..230H);
M98 = Mehringer et al. (1998ApJ...493..274M 1998ApJ...493..274M);
B94 = Blommaert et al. (1994A&A...287..479B 1994A&A...287..479B);
T09 = Tafoya et al. (2009ApJ...691..611T 2009ApJ...691..611T);
C83 = Caswell & Haynes (1983AuJPh..36..361C 1983AuJPh..36..361C).
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History:
From electronic version of the journal
References:
Qiao et al. 2016ApJS..227...26Q 2016ApJS..227...26Q Cat. J/ApJS/227/26
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 28-Jan-2019