J/AJ/164/243 3000-10700Å spectral cover of NGC 6153 with VLT (Richer+, 2022)
NGC 6153: Reality is Complicated.
Richer M.G., Arrieta A., Arias L., Castaneda-Carlos L.,
Torres-Peimbert S.,Lopez J.A.,Galindo A.
<Astron. J., 164, 243 (2022)>
=2022AJ....164..243R 2022AJ....164..243R
ADC_Keywords: Nebulae; Interstellar medium; Spectra, optical; Spectra, infrared;
Spectra, ultraviolet
Keywords: Stellar evolution ; Interstellar medium ; Planetary nebulae ;
Spectroscopy ; Astronomical techniques ; Chemical abundances ;
Cosmic abundances
Abstract:
We study the kinematics of emission lines that arise from many
physical processes in NGC6153 based upon deep, spatially resolved,
high-resolution spectra acquired with the UVES spectrograph at the
European Southern Observatory Very Large Telescope. Our most basic
finding is that the plasma in NGC6153 is complex, especially its
temperature structure. The kinematics of most emission lines defines a
classic expansion law, with the outer part expanding fastest (normal
nebular plasma). However, the permitted lines of OI, CII, NII, OII,
and NeII present a constant expansion velocity that defines a second
kinematic component (additional plasma component). The physical
conditions imply two plasma components, with the additional plasma
component having lower temperature and higher density. The [OII]
density and the [NII] temperature are anomalous, but may be understood
considering the contribution of recombination to these forbidden
lines. The two plasma components have very different temperatures. The
normal nebular plasma appears to have temperature fluctuations in part
of its volume (main shell), but only small fluctuations elsewhere. The
additional plasma component contains about half of the mass of the N2+
and O2+ ions, but only 3%-5% of the mass of H+ ions, so the two plasma
components have very different chemical abundances. We estimate
abundances of 12+log(O2+/H+)∼9.2dex and He/H∼0.13. Although they
are all complications, multiple plasma components, temperature
fluctuations, and the contributions of multiple physical processes to
a given emission line are all part of the reality in NGC6153, and
should generally be taken into account.
Description:
The data used here were acquired via program 69.D-0174A (PI Danziger)
on 2002 June 8 using the Ultraviolet and Visual Echelle Spectrograph
(UVES) on the Very Large Telescope (VLT) Kueyen (UT2) of the European
Southern Observatory (ESO).
We reduced the images from each of the three individual CCDs
separately, so we work with six wavelength intervals: CD1
(3043-3875Å), CD2 (3759-4987Å), CD3b (4980-5965Å), CD3r
(6034-7009Å), CD4b (7101-8915Å), and CD4r (9050-10655Å).
Objects:
------------------------------------------------------------
RA (2000) DE Designation(s)
------------------------------------------------------------
16 31 30.57 -40 15 12.6 NGC6153 = 2MASX J16313062-4015123
------------------------------------------------------------
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
dcd1.dat 21 49500 Deep scaled spectrum of NGC6153 for CD1 wavelength
interval
dcd2.dat 21 46500 Deep scaled spectrum of NGC6153 for CD2 wavelength
interval
dcd3b.dat 21 40960 Deep scaled spectrum of NGC6153 for CD3b wavelength
interval
dcd3r.dat 21 30720 Deep scaled spectrum of NGC6153 for CD3r wavelength
interval
dcd4b.dat 21 36864 Deep scaled spectrum of NGC6153 for CD4b wavelength
interval
dcd4r.dat 21 20480 Deep scaled spectrum of NGC6153 for CD4r wavelength
interval
scd1.dat 21 49500 Short scaled spectrum of NGC 6153 for CD1 wavelength
interval
scd2.dat 21 46500 Short scaled spectrum of NGC 6153 for CD2 wavelength
interval
scd3b.dat 21 40960 Short scaled spectrum of NGC 6153 for CD3b wavelength
interval
scd3r.dat 21 30720 Short scaled spectrum of NGC 6153 for CD3r wavelength
interval
scd4b.dat 21 36864 Short scaled spectrum of NGC 6153 for CD4b wavelength
interval
scd4r.dat 21 20480 Short scaled spectrum of NGC 6153 for CD4r wavelength
interval
--------------------------------------------------------------------------------
See also:
III/211 : Keck/HIRES Sky Line Atlas (Osterbrock+ 1997)
II/179 : Southern Spectrophotometric Standards. I + II (Hamuy+ 1992,94)
VI/64 : Recombination line intensities for hydrogenic ions (Storey+ 1995)
VI/141 : Nebular [OIII] collision strengths - SSB (Storey+, 2014)
VI/150 : Recombination coefficients for O II lines - SSB2 (Storey+, 2017)
J/A+AS/135/359 : HI and HeII fine structure components (Clegg+ 1999)
J/MNRAS/368/1959 : Chemical abundances for Hf 2-2 (Liu+, 2006)
J/MNRAS/395/855 : Spectroscopy (310-1040nm) of HH 202 (Mesa-Delgado+, 2009)
J/A+A/500/1253 : Electron-impact excitation of ArIII (Munoz Burgos+, 2009)
J/ApJ/723/658 : Abundances of the halo PN BoBn 1 (Otsuka+, 2010)
J/ApJS/188/32 : Breit-Pauli transition probabilities for SII (Tayal+, 2010)
J/A+A/530/A18 : Nebular NII lines effective recomb. coeff. (Fang+, 2013)
J/AJ/153/140 : Kinematics of CII λ6578 line in PNe (Richer+, 2017)
J/MNRAS/480/4589 : Extreme abundance discrepancy factors in PNe (Wesson+, 2018)
J/A+A/623/A155 : SII, ClII, ArIV nrj levels & transition data (Rynkun+, 2019)
J/A+A/634/A47 : Planetary nebula NGC3132 MUSE images (Monreal-Ibero+, 2020)
Byte-by-byte Description of file: [ds]cd[12].dat [ds]cd[34][br].dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 8 F8.2 0.1nm Wave Wavelength in Angstrom
10- 21 E12.6 --- Flux Flux value
--------------------------------------------------------------------------------
History:
From electronic version of the journal
(End) Prepared by [AAS], Coralie Fix [CDS], 27-Jan-2023