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LI17 - A 95 GHz methanol emission survey toward eight small supernova remnants

Short title: Li et al. (2017)
Authors: Li, Ying-Jie Xu, Ye Chen, Xi Lu, Deng-Rong Sun, Yan Du, Xin-Yu Shen, Zhi-Qiang
Journal: Research in Astronomy and Astrophysics, Volume 17, Issue 12, article id. 125 (2017).
Bibcode:

Target type: SNR
Transitions: SiO_1-0v0,CH3OH_25-30_GHz(I),CH3OH_36(I),CH3OH_44(I),CH3OH_84(I),CH3OH_95(I),CH3OH_6(II),CH3OH_37(II),CH3OH_38(II)

Abstract
We report on a 95 GHz ({8}₀-{7}₁ A⁺) methanol (CH₃OH) emission survey with the Purple Mountain Observatory Delingha 13.7 m telescope. Eight supernova remnants (SNRs) with angular size &lsim {10}^{^{\prime} } were observed, but emission was only detected in three SNRs near the Galactic center (Sgr A East, G 0.1-0.1 and G 359.92-0.09). CH₃OH emission mainly surrounds the SNRs and can be decomposed into nine spatial peaks with the velocity range of eight peaks being (-30, 70) km s^-1, and the other is (70, 120) km s^-1. They are probably excited by interaction with these SNRs and adjacent molecular gas in the central molecular zone (CMZ), although star formation may play an important role in exciting CH₃OH emission in some regions of CMZ. We infer that tidal action is unlikely to be an excitation source for CH₃OH emission. eprintid: arXiv:1709.00974	Comments: Methanol in SNRs

Abstract

We report on a 95 GHz ({8}₀-{7}₁ A⁺) methanol (CH₃OH) emission survey with the Purple Mountain Observatory Delingha 13.7 m telescope. Eight supernova remnants (SNRs) with angular size &lsim {10}^{^{\prime} } were observed, but emission was only detected in three SNRs near the Galactic center (Sgr A East, G 0.1-0.1 and G 359.92-0.09). CH₃OH emission mainly surrounds the SNRs and can be decomposed into nine spatial peaks with the velocity range of eight peaks being (-30, 70) km s^-1, and the other is (70, 120) km s^-1. They are probably excited by interaction with these SNRs and adjacent molecular gas in the central molecular zone (CMZ), although star formation may play an important role in exciting CH₃OH emission in some regions of CMZ. We infer that tidal action is unlikely to be an excitation source for CH₃OH emission. eprintid:

Comments:
Methanol in SNRs

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Detection table from Li et al. (2017)

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ID	Obs. RA	Obs. Dec	l	b	Group id	Source name	Line	V_peak	∫T_a dv	Telescope	RMS	Beam	Detection	Class	Dist. (parallax)	Date
	(J2000)	(J2000)	(deg.)	(deg.)			CH₃OH (class I)	(km/s)	(K*km/s)		(Jy)	(arcsec)	Yes/No		(kpc)
1	17 45 52	-28 51 30	0.0946	-0.0056	G0.0950-0.0065	Peak1	95 GHz (I);	49.9	0.92	PMODLH	0.025	58	+CH₃OH I +SiO	SFR_MIXED		2015 May 5 to June 25
2	17 46 10.3	-28 53 30	0.1008	-0.0799	G0.1055-0.0813	Peak2	95 GHz (I);	53	4.8	PMODLH	0.025	58	+CH₃OH I +SiO	SFR_MIXED		2015 May 5 to June 25
3	17 45 52	-28 55 30	0.0376	-0.0403	G0.0386-0.0402	Peak3	95 GHz (I);	46.7	0.59	PMODLH	0.025	58	+CH₃OH I	SFR_MIXED		2015 May 5 to June 25
4	17 46 3.4	-28 55 30	0.0593	-0.0758	G0.0592-0.0757	Peak4	95 GHz (I);	47	1.93	PMODLH	0.025	58	+CH₃OH I	SFR_MIXED		2015 May 5 to June 25
5	17 45 52	-28 56 30	0.0234	-0.0489	G0.0208-0.0502	Peak5	95 GHz (I);	-6.4	0.52	PMODLH	0.025	58	+CH₃OH I	SFR_MIXED		2015 May 5 to June 25
6	17 45 52	-28 59 00	359.9878	-0.0706	G359.9846-0.0672	Peak6	95 GHz (I);	43.2	10.94	PMODLH	0.025	58	+CH₃OH I +OH +SiO	SFR_MIXED		2015 May 5 to June 25
7	17 45 38.3	-29 03 30	359.8978	-0.0671	G359.8928-0.0671	Peak7	95 GHz (I);	18.8	3.73	PMODLH	0.025	58	+H₂O +CH₃OH I +CH₃OH II +SiO	SFR_MIXED		2015 May 5 to June 25
8	17 45 36	-29 06 00	359.8579	-0.0816	G359.8516-0.0864	Peak8	95 GHz (I);	6.8	2.65	PMODLH	0.025	58	+CH₃OH I	SFR_MIXED		2015 May 5 to June 25
	17 45 36	-29 06 00	359.8579	-0.0816	G359.8516-0.0864	Peak8	95 GHz (I);	84.8	0.47	PMODLH		58	+CH₃OH I	SFR_MIXED		2015 May 5 to June 25

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(met1_data_all.ra_hms) as ra_hms,MAX(met1_data_all.dec_dms) as dec_dms,MAX(met1_data_all.source_name) as source_name,MAX(met1_data_all.ra) as ra,MAX(met1_data_all.dec) as dec,MAX(met1_data_all.l) as l,MAX(met1_data_all.b) as b,MAX(met1_data_all.grp) as grp,MAX(met1_data_all.other_name) as other_name,MAX(met1_data_all.other_desc) as other_desc,BOOL_OR(thermal) as thermal,MAX(met1_data_all.line) as line,MAX(met1_data_all.vrange) as vrange,MAX(met1_data_all.vpeak) as vpeak,MAX(met1_data_all.peak) as peak,MAX(met1_data_all.fwhm) as fwhm,MAX(met1_data_all.int) as int,MAX(met1_data_all.rms) as rms,MAX(met1_data_all.units) as units,MAX(met1_data_all.units_rms) as units_rms,MAX(met1_data_all.date_txt) as date_txt,MAX(met1_data_all.telescope_ref) as telescope_ref,MAX(met1_data_all.telescope_conf) as telescope_conf,MAX(met1_data_all.v_step) as v_step,MAX(met1_data_all.beam) as beam,MAX(met1_data_all.beam_maj) as beam_maj,MAX(met1_data_all.beam_min) as beam_min,MAX(met1_data_all.beam_pa) as beam_pa,MAX(met1_data_all.ref) as ref,MAX(met1_data_all.list_ref) as list_ref,MAX(met1_data_all.ascii) as ascii,MAX(met1_data_all.url) as url,MAX(met1_data_all.image) as image,MAX(met1_data_all.image2) as image2,MAX(met1_data_all.image3) as image3,MAX(met1_data_all.descr) as descr,MAX(met1_data_all.id) as id,BOOL_OR(mjy_flag) as mjy_flag,BOOL_OR(rms_mjy_flag) as rms_mjy_flag,MAX(met1_data_all.dist) as dist,1 as dist_parallax,MAX(met1_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 met1_data_all  LEFT JOIN all_objects_withmet ON met1_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 met1_data_all.line=transitions."Line"  WHERE ref ilike 'LI17' AND detected=true AND hide=false GROUP BY ref

select met1_data_all.ra_hms,met1_data_all.dec_dms,met1_data_all.source_name,met1_data_all.ra,met1_data_all.dec,met1_data_all.l,met1_data_all.b,met1_data_all.grp,met1_data_all.other_name,met1_data_all.other_desc,met1_data_all.thermal,met1_data_all.line,met1_data_all.vrange,met1_data_all.vpeak,met1_data_all.peak,met1_data_all.fwhm,met1_data_all.int,met1_data_all.rms,met1_data_all.units,met1_data_all.units_rms,met1_data_all.date_txt,met1_data_all.telescope_ref,met1_data_all.telescope_conf,met1_data_all.v_step,met1_data_all.beam,met1_data_all.beam_maj,met1_data_all.beam_min,met1_data_all.beam_pa,met1_data_all.ref,met1_data_all.list_ref,met1_data_all.ascii,met1_data_all.url,met1_data_all.image,met1_data_all.image2,met1_data_all.image3,met1_data_all.descr,met1_data_all.id,met1_data_all.mjy_flag,met1_data_all.rms_mjy_flag,met1_data_all.dist,met1_data_all.dist_parallax,met1_data_all.date_txt,line_det,type,simbad_types_cat FROM met1_data_all   LEFT JOIN all_objects_withmet ON met1_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 met1_data_all.line=transitions."Line"  WHERE ref ilike 'LI17' AND detected=true AND hide=false ORDER BY detected DESC,id

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LI17 - A 95 GHz methanol emission survey toward eight small supernova remnants

View as list of objects

Detection table from Li et al. (2017)