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NH3
ZHA99 - Shock-heated NH
3
in a Molecular Jet Associated with a High-Mass Young Star
Short title
: Zhang et al. (1999)
Authors
: Zhang, QizhouHunter, Todd R.Sridharan, T. K.Cesaroni, Riccardo
Journal
: The Astrophysical Journal, Volume 527, Issue 2, pp. L117-L120.
Bibcode
:
1999ApJ...527L.117Z
Target type
: High_mass_SFR
Transitions
: NH3_(3,3)
Abstract
We present the discovery of shock-excited NH
3
in a well-collimated jet associated with the extremely young high-mass star IRAS 20126+4104. The NH
3
(3, 3) and (4, 4) emission is dominated by three clumps along the SiO jet. At the end of the jet, there exists strong and broad (+/-10 km s
-1
) NH
3
(3, 3) emission. With typical brightness temperatures greater than 500 K, the overall emission indicates a weakly inverted population and appears in an arc, consistent with the excitation by bow shocks. There are two bright spots in the NH
3
(3, 3) emission with brightness temperatures of approximately 2000 K. The narrow line width (1.5 km s
-1
FWHM), the small sizes (<0.3
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Detection table from Zhang et al. (1999)
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individual components
ID
Obs. RA
Obs. Dec
l
b
Group id
Source name
Image
Descr.
Line
V
peak
F
peak
Telescope
Beam
Detection
Class
Dist. (parallax)
Date
(J2000)
(J2000)
(deg.)
(deg.)
NH
3
(km/s)
(mJy/beam)
(arcsec)
Yes
/
No
(kpc)
1
20 14 26.7
+41 13 30
78.1228
3.6306
G78.122+3.633
IRAS 2012614104
Image
Descr
(3,3)
;
-3.7
79
NRAOVLA
1
+H
2
O
+CH
3
OH I
+CH
3
OH II
+OH
SFR
1999 March 27 and May 29
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X
DSS colored
2MASS colored
WISE colored
PACS color (70-160 um)
SPIRE color (250-500 um)
GLIMPSE 360
SDSS color
IRAC color I1,I2,I4
NVSS (1.4GHz)
ATLASGAL 870 um
ATLASGAL 870 um + Planck
Bolocam 1.1 mm
UKIDSS K
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2MASS K
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select MAX(nh3_data_all.ra_hms) as ra_hms,MAX(nh3_data_all.dec_dms) as dec_dms,MAX(nh3_data_all.source_name) as source_name,MAX(nh3_data_all.ra) as ra,MAX(nh3_data_all.dec) as dec,MAX(nh3_data_all.l) as l,MAX(nh3_data_all.b) as b,MAX(nh3_data_all.grp) as grp,MAX(nh3_data_all.other_name) as other_name,MAX(nh3_data_all.other_desc) as other_desc,BOOL_OR(thermal) as thermal,MAX(nh3_data_all.line) as line,MAX(nh3_data_all.vrange) as vrange,MAX(nh3_data_all.vpeak) as vpeak,MAX(nh3_data_all.peak) as peak,MAX(nh3_data_all.fwhm) as fwhm,MAX(nh3_data_all.int) as int,MAX(nh3_data_all.rms) as rms,MAX(nh3_data_all.units) as units,MAX(nh3_data_all.units_rms) as units_rms,MAX(nh3_data_all.date_txt) as date_txt,MAX(nh3_data_all.telescope_ref) as telescope_ref,MAX(nh3_data_all.telescope_conf) as telescope_conf,MAX(nh3_data_all.v_step) as v_step,MAX(nh3_data_all.beam) as beam,MAX(nh3_data_all.beam_maj) as beam_maj,MAX(nh3_data_all.beam_min) as beam_min,MAX(nh3_data_all.beam_pa) as beam_pa,MAX(nh3_data_all.ref) as ref,MAX(nh3_data_all.list_ref) as list_ref,MAX(nh3_data_all.ascii) as ascii,MAX(nh3_data_all.url) as url,MAX(nh3_data_all.image) as image,MAX(nh3_data_all.image2) as image2,MAX(nh3_data_all.image3) as image3,MAX(nh3_data_all.descr) as descr,MAX(nh3_data_all.id) as id,BOOL_OR(mjy_flag) as mjy_flag,BOOL_OR(rms_mjy_flag) as rms_mjy_flag,MAX(nh3_data_all.dist) as dist,1 as dist_parallax,MAX(nh3_data_all.date_txt) as date_txt,MAX(line_det) as line_det,MAX(type) as type,MAX(simbad_types_cat) as simbad_types_cat FROM nh3_data_all LEFT JOIN all_objects_withmet ON nh3_data_all.grp=all_objects_withmet.group_name LEFT JOIN object_categories ON all_objects_withmet.group_name = object_categories.group_name_cat AND object_categories.tbl_cat = 'all_objects_withmet' LEFT JOIN transitions ON nh3_data_all.line=transitions."Line" WHERE ref ilike 'ZHA99' AND detected=true AND hide=false GROUP BY ref
select nh3_data_all.ra_hms,nh3_data_all.dec_dms,nh3_data_all.source_name,nh3_data_all.ra,nh3_data_all.dec,nh3_data_all.l,nh3_data_all.b,nh3_data_all.grp,nh3_data_all.other_name,nh3_data_all.other_desc,nh3_data_all.thermal,nh3_data_all.line,nh3_data_all.vrange,nh3_data_all.vpeak,nh3_data_all.peak,nh3_data_all.fwhm,nh3_data_all.int,nh3_data_all.rms,nh3_data_all.units,nh3_data_all.units_rms,nh3_data_all.date_txt,nh3_data_all.telescope_ref,nh3_data_all.telescope_conf,nh3_data_all.v_step,nh3_data_all.beam,nh3_data_all.beam_maj,nh3_data_all.beam_min,nh3_data_all.beam_pa,nh3_data_all.ref,nh3_data_all.list_ref,nh3_data_all.ascii,nh3_data_all.url,nh3_data_all.image,nh3_data_all.image2,nh3_data_all.image3,nh3_data_all.descr,nh3_data_all.id,nh3_data_all.mjy_flag,nh3_data_all.rms_mjy_flag,nh3_data_all.dist,nh3_data_all.dist_parallax,nh3_data_all.date_txt,line_det,type,simbad_types_cat FROM nh3_data_all LEFT JOIN all_objects_withmet ON nh3_data_all.grp=all_objects_withmet.group_name LEFT JOIN object_categories ON all_objects_withmet.group_name = object_categories.group_name_cat AND object_categories.tbl_cat = 'all_objects_withmet' LEFT JOIN transitions ON nh3_data_all.line=transitions."Line" WHERE ref ilike 'ZHA99' AND detected=true AND hide=false ORDER BY detected DESC,id