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SUA07 - New detections of H2O masers in planetary nebulae and post-AGB stars using the Robledo-70 m antenna

Short title: Suarez et al. (2007)
Authors: Suarez, O. Gomez, J. F. Morata, O.
Journal: Astronomy and Astrophysics, Volume 467, Issue 3, June I 2007, pp.1085-1091
Bibcode:

Target type: pAGB_PN

Abstract
Aims:We investigated the possible relationship between the evolutionary stage of post-AGB stars and planetary nebulae (PNe) and the presence of water masers in their envelopes Methods: We have used NASA's 70-m antenna in Robledo de Chavela (Spain) to search for the water maser transition at 22 235.08 MHz, towards a sample of 105 sources with IRAS colour characteristic of post-AGB stars and PNe at declination >-32. 83% of the sources in the sample are post-AGB stars, 15% PNe or PN candidates, while only 2% seem to be HII regions. Results: We have detected five water masers, of which four are reported for the first time: two in PNe (IRAS 17443-2949 and IRAS 18061-2505), a ``water fountain'' in a post-AGB star (IRAS 16552-3050), and one in a source previously catalogued as a PN, but whose classification is uncertain (IRAS 17580-3111). Conclusions: The unexpected detections of water masers in two objects among the small subset of PNe led us to suggest that the PNe harbouring water masers are a special type of massive, rapidly evolving PNe. Tables 1 and 3 are only available in electronic form at http://www.aanda.org eprintid: arXiv:astro-ph/0703502

Abstract

Aims:We investigated the possible relationship between the evolutionary stage of post-AGB stars and planetary nebulae (PNe) and the presence of water masers in their envelopes Methods: We have used NASA's 70-m antenna in Robledo de Chavela (Spain) to search for the water maser transition at 22 235.08 MHz, towards a sample of 105 sources with IRAS colour characteristic of post-AGB stars and PNe at declination >-32. 83% of the sources in the sample are post-AGB stars, 15% PNe or PN candidates, while only 2% seem to be HII regions.
Results: We have detected five water masers, of which four are reported for the first time: two in PNe (IRAS 17443-2949 and IRAS 18061-2505), a ``water fountain'' in a post-AGB star (IRAS 16552-3050), and one in a source previously catalogued as a PN, but whose classification is uncertain (IRAS 17580-3111). Conclusions: The unexpected detections of water masers in two objects among the small subset of PNe led us to suggest that the PNe harbouring water masers are a special type of massive, rapidly evolving PNe. Tables 1 and 3 are only available in electronic form at eprintid: arXiv:astro-ph/0703502

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Detection table from Suarez et al. (2007)

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ID	Obs. RA	Obs. Dec	l	b	Group id	Source name	Line	V_peak	F_peak	∫F dv	Detection	Class	Dist. (parallax)
	(J2000)	(J2000)	(deg.)	(deg.)			H₂O	(km/s)	(Jy)	(Jy*km/s)	Yes/No		(kpc)
1	07 35 41.2	+00 14 58	217.8018	9.9477	G217.801+9.947	IRAS 07331+0021	22 GHz;	28.1	0.21	2.2	+H₂O +OH	EVOLVED
2	16 58 27.8	-30 55 06	352.5669	7.2976	G352.567+7.298	IRAS 16552-3050	22 GHz;	89.5	5.54	212.9	+H₂O -OH	EVOLVED
	16 58 27.8	-30 55 06	352.5669	7.2976	G352.567+7.298	IRAS 16552-3050	22 GHz;	-66.8	1.55	125.3	+H₂O -OH	EVOLVED
	16 58 27.8	-30 55 06	352.5669	7.2976	G352.567+7.298	IRAS 16552-3050	22 GHz;	88.6	2.84	132	+H₂O -OH	EVOLVED
5	17 47 35.3	-29 50 57	359.4423	-0.8405	G359.442-0.840	IRAS 17443-2949	22 GHz;	-6.4	10.58	114.2	+H₂O +OH	SFR_MIXED
	17 47 35.3	-29 50 57	359.4423	-0.8405	G359.442-0.840	IRAS 17443-2949	22 GHz;	-6.3	8.67	100.1	+H₂O +OH	SFR_MIXED
7	18 01 19.6	-31 11 22	359.7780	-4.0710	G359.778-4.071	IRAS 17580-3111	22 GHz;	21.3	1.09	9.6	+H₂O +OH	EVOLVED
8	18 09 12.4	-25 04 34	5.9737	-2.6110	G5.974-2.611	IRAS 18061-2505	22 GHz;	57.2	2.4	45.2	+H₂O -OH	EVOLVED
	18 09 12.4	-25 04 34	5.9737	-2.6110	G5.974-2.611	IRAS 18061-2505	22 GHz;	57.3	2.4	27.4	+H₂O -OH	EVOLVED
	18 09 12.4	-25 04 34	5.9737	-2.6110	G5.974-2.611	IRAS 18061-2505	22 GHz;	60.5	6.95	66	+H₂O -OH	EVOLVED
	18 09 12.4	-25 04 34	5.9737	-2.6110	G5.974-2.611	IRAS 18061-2505	22 GHz;	60.9	3.01	56.4	+H₂O -OH	EVOLVED

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 Download UKIDSS K FITS	2MASS K Download 2MASS K FITS

select MAX(h2o_data_all.ra_hms) as ra_hms,MAX(h2o_data_all.dec_dms) as dec_dms,MAX(h2o_data_all.source_name) as source_name,MAX(h2o_data_all.ra) as ra,MAX(h2o_data_all.dec) as dec,MAX(h2o_data_all.l) as l,MAX(h2o_data_all.b) as b,MAX(h2o_data_all.grp) as grp,MAX(h2o_data_all.other_name) as other_name,MAX(h2o_data_all.other_desc) as other_desc,BOOL_OR(thermal) as thermal,MAX(h2o_data_all.line) as line,MAX(h2o_data_all.vrange) as vrange,MAX(h2o_data_all.vpeak) as vpeak,MAX(h2o_data_all.peak) as peak,MAX(h2o_data_all.fwhm) as fwhm,MAX(h2o_data_all.int) as int,MAX(h2o_data_all.rms) as rms,MAX(h2o_data_all.units) as units,MAX(h2o_data_all.units_rms) as units_rms,MAX(h2o_data_all.date_txt) as date_txt,MAX(h2o_data_all.telescope_ref) as telescope_ref,MAX(h2o_data_all.telescope_conf) as telescope_conf,MAX(h2o_data_all.v_step) as v_step,MAX(h2o_data_all.beam) as beam,MAX(h2o_data_all.beam_maj) as beam_maj,MAX(h2o_data_all.beam_min) as beam_min,MAX(h2o_data_all.beam_pa) as beam_pa,MAX(h2o_data_all.ref) as ref,MAX(h2o_data_all.list_ref) as list_ref,MAX(h2o_data_all.ascii) as ascii,MAX(h2o_data_all.url) as url,MAX(h2o_data_all.image) as image,MAX(h2o_data_all.image2) as image2,MAX(h2o_data_all.image3) as image3,MAX(h2o_data_all.descr) as descr,MAX(h2o_data_all.id) as id,BOOL_OR(mjy_flag) as mjy_flag,BOOL_OR(rms_mjy_flag) as rms_mjy_flag,MAX(h2o_data_all.dist) as dist,1 as dist_parallax,MAX(h2o_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 h2o_data_all  LEFT JOIN all_objects_withmet ON h2o_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 h2o_data_all.line=transitions."Line"  WHERE ref ilike 'SUA07' AND detected=true AND hide=false GROUP BY ref

select h2o_data_all.ra_hms,h2o_data_all.dec_dms,h2o_data_all.source_name,h2o_data_all.ra,h2o_data_all.dec,h2o_data_all.l,h2o_data_all.b,h2o_data_all.grp,h2o_data_all.other_name,h2o_data_all.other_desc,h2o_data_all.thermal,h2o_data_all.line,h2o_data_all.vrange,h2o_data_all.vpeak,h2o_data_all.peak,h2o_data_all.fwhm,h2o_data_all.int,h2o_data_all.rms,h2o_data_all.units,h2o_data_all.units_rms,h2o_data_all.date_txt,h2o_data_all.telescope_ref,h2o_data_all.telescope_conf,h2o_data_all.v_step,h2o_data_all.beam,h2o_data_all.beam_maj,h2o_data_all.beam_min,h2o_data_all.beam_pa,h2o_data_all.ref,h2o_data_all.list_ref,h2o_data_all.ascii,h2o_data_all.url,h2o_data_all.image,h2o_data_all.image2,h2o_data_all.image3,h2o_data_all.descr,h2o_data_all.id,h2o_data_all.mjy_flag,h2o_data_all.rms_mjy_flag,h2o_data_all.dist,h2o_data_all.dist_parallax,h2o_data_all.date_txt,line_det,type,simbad_types_cat FROM h2o_data_all   LEFT JOIN all_objects_withmet ON h2o_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 h2o_data_all.line=transitions."Line"  WHERE ref ilike 'SUA07' AND detected=true AND hide=false ORDER BY detected DESC,id

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SUA07 - New detections of H2O masers in planetary nebulae and post-AGB stars using the Robledo-70 m antenna

View as list of objects

Detection table from Suarez et al. (2007)