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CES90 - Water maser variability and disk structure in S 255.

Short title: Cesaroni (1990)
Authors: Cesaroni, R.
Journal: Astronomy and Astrophysics, Vol. 233, p. 513 (1990)
Bibcode:

Target type: High_mass_SFR
Transitions: H2O_22

Abstract
The 22 GHz H2O maser emission from 5 sources associated with regions of star formation and showing triple peak profiles has been observed by means of the 32 m antenna of Medicina (Italy). One of these sources (S 255) has been monitored for about 2 years. The acquired spectra show an anticorrelated variability of the two side lines on time scales of a few months. This phenomenon is interpreted in terms of a disk in Keplerian rotation seen edge on. In order to quantify both the spectrum profile and its peculiar variations the radiative transfer equation in the disk is numerically solved, and the computed spectra compared with the observed ones. The H2O maser is demonstrated to be saturated and radiatively pumped.

Abstract

The 22 GHz H2O maser emission from 5 sources associated with regions of star formation and showing triple peak profiles has been observed by means of the 32 m antenna of Medicina (Italy). One of these sources (S 255) has been monitored for about 2 years. The acquired spectra show an anticorrelated variability of the two side lines on time scales of a few months. This phenomenon is interpreted in terms of a disk in Keplerian rotation seen edge on. In order to quantify both the spectrum profile and its peculiar variations the radiative transfer equation in the disk is numerically solved, and the computed spectra compared with the observed ones. The H2O maser is demonstrated to be saturated and radiatively pumped.

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Detection table from Cesaroni (1990)

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ID	Obs. RA	Obs. Dec	l	b	Group id	Source name	Image	Line	V_peak	F_peak	∫F dv	Telescope	RMS	Beam	Detection	Class	Dist. (parallax)	Date
	(J2000)	(J2000)	(deg.)	(deg.)				H₂O	(km/s)	(Jy)	(Jy*km/s)		(Jy)	(arcsec)	Yes/No		(kpc)
1	06 12 53.6	+17 59 27	192.5986	-0.0489	G192.599-0.048	S255	Image	22 GHz;	0.18 (0.024)	21.0 (1.2)	0.8 (0.06)	MED	2.600	114	+H₂O +CH₃OH I +CH₃OH II +OH	SFR_MIXED		Mar 1987
	06 12 53.6	+17 59 27	192.5986	-0.0489	G192.599-0.048	S255	Image	22 GHz;	7.13 (0.016)	31.0 (1.2)	0.9 (0.04)	MED	2.600	114	+H₂O +CH₃OH I +CH₃OH II +OH	SFR_MIXED		Mar 1987
	06 12 53.6	+17 59 27	192.5986	-0.0489	G192.599-0.048	S255	Image	22 GHz;	14.34 (0.079)	8.0 (1.0)	1.3 (0.19)	MED	2.600	114	+H₂O +CH₃OH I +CH₃OH II +OH	SFR_MIXED		Mar 1987
	06 12 53.6	+17 59 27	192.5986	-0.0489	G192.599-0.048	S255	Image	22 GHz;	0.21 (0.025)	17.1 (1.0)	0.8 (0.06)	MED	2.600	114	+H₂O +CH₃OH I +CH₃OH II +OH	SFR_MIXED		Jun 1987
	06 12 53.6	+17 59 27	192.5986	-0.0489	G192.599-0.048	S255	Image	22 GHz;	7.06 (0.10)	41.8 (1.0)	0.9 (0.03)	MED	2.600	114	+H₂O +CH₃OH I +CH₃OH II +OH	SFR_MIXED		Jun 1987
	06 12 53.6	+17 59 27	192.5986	-0.0489	G192.599-0.048	S255	Image	22 GHz;	13.12 (0.010)	40.2 (1.1)	0.8 (0.02)	MED	2.600	114	+H₂O +CH₃OH I +CH₃OH II +OH	SFR_MIXED		Jun 1987
	06 12 53.6	+17 59 27	192.5986	-0.0489	G192.599-0.048	S255	Image	22 GHz;	0.29 (0.195)	5.3 (2.6)	0.8 (0.47)	MED	2.600	114	+H₂O +CH₃OH I +CH₃OH II +OH	SFR_MIXED		Sep 1987
	06 12 53.6	+17 59 27	192.5986	-0.0489	G192.599-0.048	S255	Image	22 GHz;	7.08 (0.033)	36.1 (2.2)	1.1 (0.08)	MED	2.600	114	+H₂O +CH₃OH I +CH₃OH II +OH	SFR_MIXED		Sep 1987
	06 12 53.6	+17 59 27	192.5986	-0.0489	G192.599-0.048	S255	Image	22 GHz;	12.53 (0.028)	37.2 (2.6)	0.8 (0.07)	MED	2.600	114	+H₂O +CH₃OH I +CH₃OH II +OH	SFR_MIXED		Sep 1987
	06 12 53.6	+17 59 27	192.5986	-0.0489	G192.599-0.048	S255	Image	22 GHz;	0.42 (0.083)	4.4 (1.0)	0.7 (0.20)	MED	2.600	114	+H₂O +CH₃OH I +CH₃OH II +OH	SFR_MIXED		Nov 1987
	06 12 53.6	+17 59 27	192.5986	-0.0489	G192.599-0.048	S255	Image	22 GHz;	7.17 (0.008)	53.6 (0.9)	1.0 (0.02)	MED	2.600	114	+H₂O +CH₃OH I +CH₃OH II +OH	SFR_MIXED		Nov 1987
	06 12 53.6	+17 59 27	192.5986	-0.0489	G192.599-0.048	S255	Image	22 GHz;	12.20 (0.008)	53.7 (0.8)	1.2 (0.02)	MED	2.600	114	+H₂O +CH₃OH I +CH₃OH II +OH	SFR_MIXED		Nov 1987
	06 12 53.6	+17 59 27	192.5986	-0.0489	G192.599-0.048	S255	Image	22 GHz;	0.60 (0.055)	4.5 (0.9)	0.5 (0.13)	MED	2.600	114	+H₂O +CH₃OH I +CH₃OH II +OH	SFR_MIXED		Feb 1988
	06 12 53.6	+17 59 27	192.5986	-0.0489	G192.599-0.048	S255	Image	22 GHz;	7.21 (0.005)	74.8 (0.7)	1.1 (0.01)	MED	2.600	114	+H₂O +CH₃OH I +CH₃OH II +OH	SFR_MIXED		Feb 1988
	06 12 53.6	+17 59 27	192.5986	-0.0489	G192.599-0.048	S255	Image	22 GHz;	12.04 (0.007)	48.3 (0.6)	1.1 (0.02)	MED	2.600	114	+H₂O +CH₃OH I +CH₃OH II +OH	SFR_MIXED		Feb 1988
	06 12 53.6	+17 59 27	192.5986	-0.0489	G192.599-0.048	S255	Image	22 GHz;	0.67 (0.015)	48.4 (1.4)	1.1 (0.04)	MED	2.600	114	+H₂O +CH₃OH I +CH₃OH II +OH	SFR_MIXED		Jul 1988
	06 12 53.6	+17 59 27	192.5986	-0.0489	G192.599-0.048	S255	Image	22 GHz;	7.08 (0.016)	46.9 (1.3)	1.1 (0.04)	MED	2.600	114	+H₂O +CH₃OH I +CH₃OH II +OH	SFR_MIXED		Jul 1988
	06 12 53.6	+17 59 27	192.5986	-0.0489	G192.599-0.048	S255	Image	22 GHz;	11.48 (0.179)	4.1 (1.4)	1.1 (0.43)	MED	2.600	114	+H₂O +CH₃OH I +CH₃OH II +OH	SFR_MIXED		Jul 1988
	06 12 53.6	+17 59 27	192.5986	-0.0489	G192.599-0.048	S255	Image	22 GHz;	0.41 (0.007)	46.7 (0.8)	0.8 (0.02)	MED	2.600	114	+H₂O +CH₃OH I +CH₃OH II +OH	SFR_MIXED		Sep 1988
	06 12 53.6	+17 59 27	192.5986	-0.0489	G192.599-0.048	S255	Image	22 GHz;	7.03 (0.008)	44.0 (0.7)	1.1 (0.02)	MED	2.600	114	+H₂O +CH₃OH I +CH₃OH II +OH	SFR_MIXED		Sep 1988
	06 12 53.6	+17 59 27	192.5986	-0.0489	G192.599-0.048	S255	Image	22 GHz;	11.71 (0.072)	4.3 (0.8)	0.8 (0.17)	MED	2.600	114	+H₂O +CH₃OH I +CH₃OH II +OH	SFR_MIXED		Sep 1988
	06 12 53.6	+17 59 27	192.5986	-0.0489	G192.599-0.048	S255	Image	22 GHz;	0.36 (0.014)	23.8 (0.9)	0.7 (0.03)	MED	2.600	114	+H₂O +CH₃OH I +CH₃OH II +OH	SFR_MIXED		Sep 1988
	06 12 53.6	+17 59 27	192.5986	-0.0489	G192.599-0.048	S255	Image	22 GHz;	6.95 (0.014)	27.9 (0.8)	1.1 (0.03)	MED	2.600	114	+H₂O +CH₃OH I +CH₃OH II +OH	SFR_MIXED		Oct 1988
	06 12 53.6	+17 59 27	192.5986	-0.0489	G192.599-0.048	S255	Image	22 GHz;	11.57 (0.092)	3.2 (1.0)	0.6 (0.22)	MED	2.600	114	+H₂O +CH₃OH I +CH₃OH II +OH	SFR_MIXED		Oct 1988
	06 12 53.6	+17 59 27	192.5986	-0.0489	G192.599-0.048	S255	Image	22 GHz;	13.92 (0.062)	3.6 (1.3)	0.4 (0.15)	MED	2.600	114	+H₂O +CH₃OH I +CH₃OH II +OH	SFR_MIXED		Oct 1988
	06 12 53.6	+17 59 27	192.5986	-0.0489	G192.599-0.048	S255	Image	22 GHz;	0.67 (0.201)	2.5 (0.7)	1.4 (0.49)	MED	2.600	114	+H₂O +CH₃OH I +CH₃OH II +OH	SFR_MIXED		Jan 1989
	06 12 53.6	+17 59 27	192.5986	-0.0489	G192.599-0.048	S255	Image	22 GHz;	6.90 (0.012)	35.6 (0.9)	0.9 (0.03)	MED	2.600	114	+H₂O +CH₃OH I +CH₃OH II +OH	SFR_MIXED		Jan 1989
	06 12 53.6	+17 59 27	192.5986	-0.0489	G192.599-0.048	S255	Image	22 GHz;	11.78 (0.076)	4.8 (1.0)	0.7 (0.18)	MED	2.600	114	+H₂O +CH₃OH I +CH₃OH II +OH	SFR_MIXED		Jan 1989
29	06 14 36.5	+13 49 33.4	196.4535	-1.6798	G196.454-1.677	S269	Image	22 GHz;	19.5	150		MED	2.600	114	+H₂O -CH₃OH I +CH₃OH II +OH	SFR
30	18 47 34.7	-01 12 45.9	31.4126	0.3056	G31.412+0.307	G31.4+0.3	Image	22 GHz;	99	80		MED	2.600	114	+H₂O +CH₃OH I +CH₃OH II +OH	SFR
31	18 47 42.1	-01 45 9.4	30.9463	0.0318	G30.944+0.035	W43 OH	Image	22 GHz;	-52	65		MED	2.600	114	+H₂O -CH₃OH II +OH +SiO	SFR_MIXED
32	19 13 22	+10 50 52.5	45.0708	0.1325	G45.071+0.132	G45.1+0.1	Image	22 GHz;	60	50		MED	2.600	114	+H₂O +CH₃OH I +CH₃OH II +OH -SiO	SFR

DSS colored	2MASS colored	WISE colored
SDSS color	IRAC color I1,I2,I4	GLIMPSE 360
PACS color (70-160 um)	SPIRE color (250-500 um)	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 'CES90' 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 'CES90' AND detected=true AND hide=false ORDER BY detected DESC,id

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CES90 - Water maser variability and disk structure in S 255.

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Detection table from Cesaroni (1990)