J/ApJ/839/83 GMOS spectroscopic obs. of SNR candidates in M83 (Winkler+, 2017)
A Spectroscopic study of the rich supernova remnant population in M83.
Winkler P.F., Blair W.P., Long K.S.
<Astrophys. J., 839, 83 (2017)>
=2017ApJ...839...83W 2017ApJ...839...83W
ADC_Keywords: Supernova remnants ; Spectroscopy ; Galaxies, nearby ;
H II regions
Keywords: galaxies: individual (M83) ; galaxies: ISM ; ISM: supernova remnants
Abstract:
We report the results from a spectrophotometric study sampling the 300
candidate supernova remnants (SNRs) in M83 identified through optical
imaging with Magellan/IMACS and Hubble Space Telescope/WFC3. Of the
118 candidates identified based on a high
[SII]λλ6716,6731 to Hα emission ratio, 117 show
spectroscopic signatures of shock-heated gas, confirming them as
SNRs-the largest uniform set of SNR spectra for any galaxy. Spectra of
22 objects with a high [OIII]λ5007 to Hα emission ratio,
selected in an attempt to identify young ejecta-dominated SNRs like
Cas A, reveal only one (previously reported) object with the broad
(1000km/s) emission lines characteristic of ejecta-dominated SNRs,
beyond the known SN1957D remnant. The other 20 [OIII]-selected
candidates include planetary nebulae, compact HII regions, and one
background QSO. Although our spectroscopic sample includes 22 SNRs
smaller than 11pc, none of the other objects show broad emission
lines; instead their spectra stem from relatively slow (∼200km/s)
radiative shocks propagating into the metal-rich interstellar medium
of M83. With six SNe in the past century, one might expect more of
M83's small-diameter SNRs to show evidence of ejecta; this appears not
to be the case. We attribute their absence to several factors,
including that SNRs expanding into a dense medium evolve quickly to
the ISM-dominated phase, and that SNRs expanding into regions already
evacuated by earlier SNe are probably very faint.
Description:
We used the GMOS on the 8.2m Gemini-South telescope to obtain all the
spectra reported here. Most were obtained in a classically scheduled
observing run on 2011 April 7-9 (UT); masks 1-7.
We later obtained spectra for two additional masks (which we refer to
as masks 8 and 9 for simplicity) in a queue-scheduled program
(GS-2015A-Q-90) during the 2015A semester.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 72 118 The [SII]-selected SNR candidates with spectra
table3.dat 72 22 The [OIII]-selected SNR candidates with spectra
table4.dat 52 118 Emission line fluxes: [SII]-selected SNR candidates
table5.dat 52 22 Emission line fluxes: [OIII]-selected SNR candidates
table6.dat 40 18 HII regions with spectra
table7.dat 42 18 Emission line fluxes: HII regions
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See also:
II/227 : The Asiago Supernova Catalogue 1999 (Barbon+, 1999)
II/179 : Southern Spectrophotometric Standards. I + II (Hamuy+ 1992,94)
J/A+AS/130/421 : Radio continuum study of the MC (Filipovic+ 1998)
J/AJ/119/2214 : Photometry of Magellanic OB associations (Massey+, 2000)
J/A+A/410/53 : M83 X-ray sources (Soria+, 2003)
J/MNRAS/355/44 : ATCA SMC Radio Continuum Source. II. (Payne+, 2004)
J/A+A/441/981 : HII regions in 5 spiral galaxies (Bresolin+, 2005)
J/ApJ/695/580 : Oxygen abundance in M83 (Bresolin+, 2009)
J/ApJS/203/8 : Optical SNR candidates in M83 (Blair+, 2012)
J/ApJ/788/55 : HST/WFC3 SNR discoveries in M83 (NGC5236) (Blair+, 2014)
J/ApJS/212/21 : A deep Chandra ACIS survey of M83 (Long+, 2014)
J/A+A/578/A100 : Infrared massive stellar content of M83 (Williams+, 2015)
http://hea-www.cfa.harvard.edu/ChandraSNR/ : Chandra SNR catalog home page
Byte-by-byte Description of file: table[23].dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- Name Name (G1)
10- 10 A1 --- f_Name [1/2] Flag on Name (1)
12- 25 A14 --- OName Other names (G1)
27- 28 I2 h RAh [13] Hour of Right Ascension (J2000)
30- 31 I2 min RAm [36/37] Minute of Right Ascension (J2000)
33- 37 F5.2 s RAs Second of Right Ascension (J2000)
39- 39 A1 --- DE- [-] Sign of the Declination (J2000)
40- 41 I2 deg DEd [29] Degree of Declination (J2000)
43- 44 I2 arcmin DEm [48/56] Arcminute of Declination (J2000)
46- 49 F4.1 arcsec DEs Arcsecond of Declination (J2000)
51- 54 F4.1 pc Diam [2.7/81] Diameter
56- 58 F3.1 kpc Rad [0.1/7] Galactocentric radius
60- 66 A7 --- [LKB2014] X-ray detection source ID (L14-NNN) (2)
68- 72 A5 --- Mask Mask ID
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Note (1): Flag as follows:
1 = The position and size for B12-014 have been slightly revised since
the original B12 paper; see Blair et al (2017, ApJS, submitted).
2 = B12-174a, which has broad, blended emission lines, is discussed by
Blair et al. (2015ApJ...800..118B 2015ApJ...800..118B).
Note (2): Candidates which are coincident with X-ray sources in M83 as
analyzed by Long+ (2014, J/ApJS/212/21 ; <[LKB2014] XNNN> in Simbad).
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Byte-by-byte Description of file: table[45].dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- Name Name (G1)
10- 13 I4 10-20W/m2 F(Ha) [7/1759]? Hα Flux,
in 10-17erg/cm2/s units (3)
15- 18 I4 --- Hb/Ha [11/170]? Ratio of Hβ to Hα (4)
19 A1 --- u_Hb/Ha Uncertainty flag on Hb/Ha
21- 24 I4 --- OIII/Ha [4/855]? Ratio of [OIII]5007
to Hα (4)
25- 25 A1 --- u_OIII/Ha Uncertainty flag on [OIII]/Ha
27- 30 I4 --- OI/Ha [3/300]? Ratio of [OI] 6300 to Hα (4)
31- 31 A1 --- u_OI/Ha Uncertainty flag on [OI]/Ha
33- 35 I3 --- Ha/Ha [300] Ratio of Hα to Hα
(always "300") (4)
37- 39 I3 --- NII/Ha [82/740]? Ratio of [NII]6584
to Hα (4)
41- 43 I3 --- SII6717/Ha [23/353]? Ratio of [SII]6717
to Hα (4)
45- 47 I3 --- SII6731/Ha [15/261]? Ratio of [SII]6731
to Hα (4)
49- 52 F4.2 --- SII/Ha [0.1/2.1]? Ratio of total [SII] to Hα
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Note (3): This is flux within the slit, not necessarily the entire flux from
the object.
Note (4): Ratio to Hα flux where, by convention, Hα is normalized
to 300.
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Byte-by-byte Description of file: table6.dat
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Bytes Format Units Label Explanations
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1- 6 A6 --- HII HII Name
8- 9 I2 h RAh [13] Hour of Right Ascension (J2000)
11- 12 I2 min RAm [36/37] Minute of Right Ascension (J2000)
14- 18 F5.2 s RAs Second of Right Ascension (J2000)
20- 20 A1 --- DE- [-] Sign of the Declination (J2000)
21- 22 I2 deg DEd [29] Degree of Declination (J2000)
24- 25 I2 arcmin DEm [49/55] Arcminute of Declination (J2000)
27- 30 F4.1 arcsec DEs Arcsecond of Declination (J2000)
32- 34 F3.1 kpc Rad [0.6/7] Galactocentric radius
36- 40 A5 --- Mask Mask ID
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Byte-by-byte Description of file: table7.dat
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Bytes Format Units Label Explanations
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1- 6 A6 --- HII HII Name
8- 11 I4 10-20W/m2 F(Ha) [90/9809] Hα Flux,
in 10-17erg/cm2/s
13- 14 I2 --- Hb/Ha [34/96] Ratio of Hβ to Hα (1)
16- 17 I2 --- OIII/Ha [1/79] Ratio of [OIII]5007 to Hα (1)
22- 22 I1 --- OI/Ha [1/4]? Ratio of [OI]6300 to Hα (1)
23- 23 A1 --- u_OI/Ha Uncertainty flag on [OI]/Ha
25- 27 I3 --- Ha/Ha [300] Ratio of Hα to Hα
(always "300") (1)
29- 31 I3 --- NII/Ha [97/154] Ratio of [NII]6584
to Hα (1)
33- 34 I2 --- SII6717/Ha [22/50] Ratio of [SII]6717 to Hα (1)
36- 37 I2 --- SII6731/Ha [16/37] Ratio of [SII]6731 to Hα (1)
39- 42 F4.2 --- SII/Ha [0.1/0.3] Ratio of total [SII] to Hα
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Note (1): Ratio to Hα flux where, by convention, Hα is normalized
to 300.
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Global notes:
Note (G1): The primary names, in priority order, are XXX-### numbers from the
catalogs XXX of --
B12 = Blair, Winkler & Long (2012, J/ApJS/203/8 ;
<[BWL2012] NNN> in Simbad);
D10 = Table 2, Dopita et al. (2010ApJ...710..964D 2010ApJ...710..964D ;
<[DBL2010] M83-SNR-1-NN> in Simbad);
B14 = Blair et al. (2014, J/ApJ/788/55 ; <[BCD2014] NN> in Simbad).
D10-4 = Table 4, Dopita et al. (2010ApJ...710..964D 2010ApJ...710..964D ;
<[DBL2010] M83-SRC-1-ON> in Simbad).
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History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 22-Nov-2017