J/ApJ/897/83 Component structure in the neighborhood of IC 443 (Ritchey+, 2020)
Physical Conditions in Shocked Interstellar Gas Interacting with the Supernova
Remnant IC 443.
Ritchey A.M., Jenkins E.B., Federman S.R., Rice J.S., Caprioli D.,
Wallerstein G.
<Astrophys. J., 897, 83 (2020)>
=2020ApJ...897...83R 2020ApJ...897...83R
ADC_Keywords: Supernova remnants; Abundances; Interstellar medium;
Spectra, ultraviolet; Spectra, optical
Keywords: Diffuse interstellar clouds ; Interstellar molecules ;
Supernova remnants ; Interstellar abundances
Abstract:
We present the results of a detailed investigation into the physical
conditions in interstellar material interacting with the supernova
remnant (SNR) IC443. Our analysis is based on a comprehensive
examination of high-resolution far-ultraviolet spectra obtained with
the Space Telescope Imaging Spectrograph onboard the Hubble Space
Telescope of two stars behind IC443. One of our targets (HD43582)
probes gas along the entire line of sight through the SNR, while the
other (HD254755) samples material located ahead of the primary
supernova shock front. We identify low-velocity quiescent gas in both
directions and find that the densities and temperatures in these
components are typical of diffuse atomic and molecular clouds.
Numerous high- velocity components are observed in the absorption
profiles of neutral and singly ionized atomic species toward HD43582.
These components exhibit a combination of greatly enhanced thermal
pressures and significantly reduced dust-grain depletions. We
interpret this material as cooling gas in a recombination zone far
downstream from shocks driven into neutral gas clumps. The pressures
derived for a group of ionized gas components at high positive
velocity toward HD43582 are lower than those of the other shocked
components, pointing to pressure inhomogeneities across the remnant. A
strong, very high velocity component near -620km/s is seen in the
absorption profiles of highly ionized species toward HD43582. The
velocity of this material is consistent with the range of shock
velocities implied by observations of soft thermal X-ray emission from
IC443. Moderately high velocity gas toward HD254755 may represent
shocked material from a separate foreground SNR.
Description:
High-resolution Hubble Space Telescope Space Telescope Imaging
Spectrograph (HST/STIS) spectra of HD 43582 and HD 254755 were
acquired under program GO 13709, which was awarded 10 orbits of HST
observing time in Cycle 22. The data were obtained in 2015 March.
(R∼108000) See details in table1.
To supplement our far-UV HST/STIS spectra of HD 43582 and HD 254755,
we reexamined the very high S/N ground-based spectra obtained of these
stars using the Hobby-Eberly Telescope High-Resolution Spectrograph
(HET/HRS) at McDonald Observatory. Since the HET spectra were acquired
to study lithium isotope ratios in IC 443, using the very weak LiI
λ6707 feature, they are characterized by high resolution
(R∼98000) and very high S/N (∼750 per pixel near 6707Å).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 63 2 Summary of HST/STIS observations
table5.dat 67 104 Observed and calculated quantities obtained for
individual velocity channels
tabled1.dat 272 38 Detailed component structure from HST/STIS spectra
tabled2.dat 140 79 Detailed component structure from HET/HRS spectra
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See also:
I/349 : StarHorse, Gaia DR2 photo-astrometric distances (Anders+, 2019)
J/A+A/279/541 : Sub-mm observations of SNR IC 443 (van Dishoeck+ 1993)
J/A+AS/123/159 : IRON Project. XXII. C and O radiative rates (Galavis+ 1997)
J/ApJS/147/61 : Interstellar Ca I absorption (Welty+, 2003)
J/ApJS/167/334 : Radiative recombination data for plasmas (Badnell+, 2006)
J/ApJS/168/213 : Ionization states and cooling efficiencies (Gnat+, 2007)
J/ApJ/700/1299 : Gas-phase element depletions in the ISM (Jenkins, 2009)
J/ApJ/734/65 : CI radial velocities with HST/STIS (Jenkins+, 2011)
J/ApJ/728/70 : The abundance of boron in diffuse clouds (Ritchey+, 2011)
J/ApJ/788/122 : IR photometry of YSO candidates toward SNR IC 443 (Su+, 2014)
J/ApJS/224/8 : The first Fermi LAT SNR catalog (1SC) (Acero+, 2016)
J/ApJS/229/34 : Effects of preionization radiative shocks (Sutherland+, 2017)
J/A+A/612/A3 : HESS Galactic supernova remnants (Hess+, 2018)
J/ApJS/236/36 : Ga, Ge, As, Kr, Cd, Sn and Pb column densities (Ritchey+,2018)
Byte-by-byte Description of file: table1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 8 A8 --- Star Stellar identifier
10- 16 A7 --- SpT Spectral type
18- 21 F4.2 mag Vmag [8.79/8.91] V-band magnitude
23- 26 F4.2 mag E(B-V) [0.55/0.7] B-V color
28- 30 F3.1 kpc Dist [2/3.6] Distance
32- 37 A6 --- Set Data set
39- 43 I5 s Texp [12807] Exposure time
45- 48 I4 0.1nm Wave [1307] Centrale wavelength of exposition (Å)
50- 54 A5 --- Grating Grating
56- 63 A8 arcsec Slit Slit
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Byte-by-byte Description of file: table5.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 8 A8 --- Star Stellar identifier
10- 14 F5.1 km/s V* [-54.5/53.5] Velocity
16- 19 F4.2 --- OI*/OI** [0.7/2.16] Column density ratio of first
to second excited level of OI
21- 24 F4.2 --- e_OI*/OI** [0.09/0.63] Uncertainty in OI*/OI**
26- 30 F5.2 [-] [OI*+OI**/Otot] [-4.38/-1.71] log ratio of first +
second excited levels of OI to total
O abundance
32- 35 F4.2 [-] e_[OI*+OI**/Otot] [0.04/0.12] Uncertainty in
[OI*+OI**/Otot]
37- 41 F5.2 [-] [SiII*/SiII] [-3.58/-1.21] log ratio of excited to
ground level of SiII
43- 46 F4.2 [-] e_[SiII*/SiII] [0.06/0.18] Uncertainty in [SiII*/SiII]
48- 51 F4.2 [cm-3] [Htot] [0.63/3.94] log total H density
53- 56 F4.2 [K] [T] [2.04/4.92] log kinetic temperature
58- 61 F4.2 [cm-3.K] [p/k] [4.33/7.12] log thermal pressure
63- 67 F5.2 [cm-3] [ne] [-1.82/2.09] log electron density
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Byte-by-byte Description of file: tabled1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 8 A8 --- Star Stellar identifier
11- 15 F5.1 km/s SiII*v [-98.3/96.4]? Excited SiII level velocity
17- 21 F5.2 [cm-2] [SiII*] [11.23/13.29]? log excited SiII level column
density
23- 26 F4.2 [cm-2] e_[SiII*] [0.03/0.23]? Uncertainty in logSiII*
28- 30 F3.1 km/s SiII*b [1.3/6.7]? Excited SiII level b-value
33- 37 F5.1 km/s OI*v [-54.4/52.0]? First excited OI level velocity
39- 43 F5.2 [cm-2] [OI*] [12.63/14.2]? log first excited OI level column
density
45- 48 F4.2 [cm-2] e_[OI*] [0.04/0.18]? Uncertainty in logOI*
50- 52 F3.1 km/s OI*b [1.6/4.5]? First excited OI level b-value
55- 59 F5.1 km/s OI**v [-56.3/51.3]? Second excited OI level velocity
61- 65 F5.2 [cm-2] [OI**] [12.47/14.12]? log second excited OI level
column density
67- 70 F4.2 [cm-2] e_[OI**] [0.04/0.15]? Uncertainty in logOI**
72- 74 F3.1 km/s OI**b [1.6/5.9]? Second excited OI level b-value
77- 81 F5.1 km/s SIIv [-54.0/56.0]? SII velocity
82 A1 --- f_[SII] [s] Indicates SII component is saturated
83- 87 F5.2 [cm-2] [SII] [13.8/14.95]? log SII column density
89- 92 F4.2 [cm-2] e_[SII] [0.07/0.15]? Uncertainty in [SII]
94- 96 F3.1 km/s SIIb [1.7/4.8]? SII b-value
99-103 F5.1 km/s NiIIv [-53.9/29.6]? NiII velocity
105-109 F5.2 [cm-2] [NiII] [11.64/13.54]? log NiII column density
111-114 F4.2 [cm-2] e_[NiII] [0.03/0.41]? Uncertainty in [NiII]
116-118 F3.1 km/s NiIIb [1.9/7.3]? NiII b-value
121-125 F5.1 km/s MgIIv [-1.6/30.3]? MgII velocity
127-131 F5.2 [cm-2] [MgII] [14.56/16.53]? log MgII column density
133-136 F4.2 [cm-2] e_[MgII] [0.04/0.14]? Uncertainty in [MgII]
138-140 F3.1 km/s MgIIb [1.2/4.1]? MgII b-value
143-147 F5.1 km/s OIv [2.0/31.0]? OI velocity
149-153 F5.2 [cm-2] [OI] [17.18/18.15]? log OI column density
155-158 F4.2 [cm-2] e_[OI] [0.03/0.16]? Uncertainty in [OI]
160-162 F3.1 km/s OIb [1.6/4.8]? OI b-value
165-169 F5.1 km/s CIv [-48.1/52.2]? CI velocity
171-175 F5.2 [cm-2] [CI] [11.77/15.02]? log CI column density
177-180 F4.2 [cm-2] e_[CI] [0.02/0.11]? Uncertainty in [CI]
182-184 F3.1 km/s CIb [0.2/3.4]? C I b-value
187-191 F5.1 km/s CI*v [-48.1/52.2]? First excited CI level velocity
193-197 F5.2 [cm-2] [CI*] [11.04/14.67]? log first excited CI level
column density
199-202 F4.2 [cm-2] e_[CI*] [0.02/0.62]? Uncertainty in [CI*]
204-206 F3.1 km/s CI*b [0.2/3.4]? First excited CI level b-value
209-213 F5.1 km/s CI**v [-48.1/52.2]? Second excited CI level velocity
215-219 F5.2 [cm-2] [CI**] [12.0/14.51]? log second excited CI level
column density
221-224 F4.2 [cm-2] e_[CI**] [0.02/0.13]? Uncertainty in [CI**]
226-228 F3.1 km/s CI**b [0.2/3.4]? Second excited CI level b-value
231-235 F5.1 km/s ClIv [-26.6/49.6]? ClI velocity
237-241 F5.2 [cm-2] [ClI] [11.68/14.93]? log ClI column density
243-246 F4.2 [cm-2] e_[ClI] [0.04/0.33]? Uncertainty in [ClI]
248-250 F3.1 km/s ClIb [0.5/4.5]? ClI b-value
253-257 F5.1 km/s SIv [-8.4/25.5]? SI velocity
259-263 F5.2 [cm-2] [SI] [12.27/14.49]? log SI column density
265-268 F4.2 [cm-2] e_[SI] [0.04/0.11]? Uncertainty in [SI]
270-272 F3.1 km/s SIb [0.5/2.2]? SI b-value
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Byte-by-byte Description of file: tabled2.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 8 A8 --- Star Stellar identifier
10- 15 F6.1 km/s CaIIv [-104.1/99.4]? CaII velocity
16 A1 --- f_[CaII] [n] Indicates CaII data is not available
17- 21 F5.2 [cm-2] [CaII] [10.59/13.16]? log Ca II column density
23- 26 F4.2 [cm-2] e_[CaII] [0.03/0.1]? Uncertainty in [CaII]
28- 30 F3.1 km/s CaIIb [1.2/9.2]? CaII b-value
33- 37 F5.1 km/s CaIv [-84.6/54.6]? CaI velocity
39- 43 F5.2 [cm-2] [CaI] [8.84/11.14]? log CaI column density
45- 48 F4.2 [cm-2] e_[CaI] [0.02/0.27]? Uncertainty in [CaI]
50- 52 F3.1 km/s CaIb [0.3/4.3]? CaI b-value
54- 59 F6.1 km/s NaIv [-102.6/55.2]? NaI velocity
60 A1 --- f_[NaI] [s] Indicates NaI component is saturated
61- 65 F5.2 [cm-2] [NaI] [10.22/12.55]? log NaI column density
67- 70 F4.2 [cm-2] e_[NaI] [0.01/0.04]? Uncertainty in [NaI]
72- 74 F3.1 km/s NaIb [0.6/8.6]? NaI b-value
77- 81 F5.1 km/s KIv [-67.9/28.7]? KI velocity
83- 87 F5.2 [cm-2] [KI] [9.58/12.84]? log KI column density
89- 92 F4.2 [cm-2] e_[KI] [0.01/0.16]? Uncertainty in [KI]
94- 96 F3.1 km/s KIb [0.3/3.5]? KI b-value
99-103 F5.1 km/s CH+v [-74.2/25.6]? CH+ velocity
105-109 F5.2 [cm-2] [CH+] [12.1/13.58]? log CH+ column density
111-114 F4.2 [cm-2] e_[CH+] [0.01/0.19]? Uncertainty in [CH+]
116-118 F3.1 km/s CH+b [0.3/3.5]? CH+ b-value
121-125 F5.1 km/s CHv [-50.9/26.1]? [CH] velocity
127-131 F5.2 [cm-2] [CH] [11.93/13.7]? log CH column density
133-136 F4.2 [cm-2] e_[CH] [0.01/0.13]? Uncertainty in [CH]
138-140 F3.1 km/s CHb [0.3/3.5]? CH b-value
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History:
From electronic version of the journal
(End) Prepared by [AAS], Coralie Fix [CDS], 27-Sep-2021