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*J/A+A/591/A74* Nebular emission lines towards NGC3372 center (Damiani+, 2016)
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Gaia-ESO Survey: Gas dynamics in the Carina Nebula through optical emission
lines.
Damiani F., Bonito R., Magrini L., Prisinzano L., Mapelli M., Micela G.,
Kalari V., Maiz Apellaniz J., Gilmore G., Randich S., Alfaro E.,
Flaccomio E., Koposov S., Klutsch A., Lanzafame A.C., Pancino E.,
Sacco G.G., Bayo A., Carraro G., Casey A.R., Costado M.T., Franciosini E.,
Hourihane A., Lardo C., Lewis J., Monaco L., Morbidelli L., Worley C.,
Zaggia S., Zwitter T., Dorda R.
=2016A&A...591A..74D (SIMBAD/NED BibCode)
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*ADC_Keywords*: H II regions - Interstellar medium
*Keywords*: ISM: individual objects: Carina Nebula - ISM: general - HII regions
*Abstract*:
We present observations from the Gaia-ESO Survey in the lines of
H?, [NII], [SII], and He I of nebular emission in the central
part of the Carina nebula. We investigate the properties of the two
already known kinematic components (approaching and receding), which
account for the bulk of emission. Moreover, we investigate the
features of the much less known low-intensity high-velocity (absolute
RV>50km/s) gas emission.
We show that gas giving rise to H? and HeI emission is
dynamically well correlated with but not identical to gas seen through
forbidden-line emission. Gas temperatures are derived from line-width
ratios, and densities from [SII] doublet ratios. The spatial
variation of N ionization is also studied, and found to differ between
the approaching and receding components. The main result is that the
bulk of the emission lines in the central part of Carina arise from
several distinct shell-like expanding regions, the most evident found
around ? Car, the Trumpler 14 core, and the star WR25. These
"shells" are non-spherical and show distortions probably caused by
collisions with other shells or colder, higher-density gas. Some of
them are also partially obscured by foreground dust lanes, while very
little dust is found in their interior. Preferential directions,
parallel to the dark dust lanes, are found in the shell geometries and
physical properties, probably related to strong density gradients in
the studied region. We also find evidence that the ionizing flux
emerging from ? Car and the surrounding Homunculus nebula varies
with polar angle. The high-velocity components in the wings of
H? are found to arise from expanding dust reflecting the
? Car spectrum.
*Description*:
Nebular emission lines of H-alpha, [NII] 6584Å, HeI 6678Å,
[SII] 6717Å, [SII] 6731Å, towards the center of Carina nebula,
are modeled with two gaussians each ('blue' and 'red' components).
Best-fit parameters are given in the table. Line widths include the
instrumental width of the Giraffe spectrograph (7km/s). Radial
velocities are heliocentric.
*Objects*:
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RA (ICRS) DE Designation(s)
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10 44 19.0 -59 53 21 Carina Nebula = NGC 3372
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*File Summary*:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat <#sRM2.1> 281 866 Best-fit parameters for nebular lines
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*See also*:
J/A+A/423/579 : Diffuse emissions in Carina nebula (Mizutani+, 2004)
J/MNRAS/367/513 : JHKs[3.5][4.5] photometry of NGC 3372 (Tapia+, 2006)
J/ApJ/667/963 : Near-infrared photometry of Carina nebula (Sanchawala+, 2007)
J/ApJ/739/100 : [NII] observations of Carina Nebula (NGC3372) (Oberst+, 2011)
J/ApJS/194/2 : Chandra Carina Complex Project (CCCP) catalog (Broos+, 2011)
J/ApJS/194/14 : A Pan-Carina YSO catalog (Povich+, 2011)
J/A+A/565/A107 : Globulettes in the Carina nebula (Grenman+, 2014)
J/A+A/567/A109 : Carina nebula optically identified YSOs (Kumar+, 2014)
J/A+A/572/A116 : The VISTA Carina Nebula Survey (Preibisch+, 2014)
*Byte-by-byte Description of file*: table1.dat <#sRM-F.66>
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Bytes Format Units Label Explanations
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1- 29 A29 --- Id Identifier
31- 38 F8.4 deg RAdeg Right Ascension (J2000)
40- 48 F9.5 deg DEdeg Declination (J2000)
50- 58 F9.2 km/s/min HaNb ? Intensity of blueshifted H-alpha
line (HaNb)
60- 65 F6.2 km/s HaRVb ? Radial velocity of blueshifted
H-alpha line (HaRVb)
67- 71 F5.2 km/s Hasigmab ? Gaussian width of blueshifted
H-alpha line (Hasigmab)
73- 81 F9.2 km/s/min HaNr ? Intensity of redshifted H-alpha
line (HaNr, in km/s/min)
83- 88 F6.2 km/s HaRVr ? Radial velocity of redshifted
H-alpha line (HaRVr)
90- 94 F5.2 km/s Hasigmar ? Gaussian width of redshifted
H-alpha line (Hasigmar)
96-103 F8.2 km/s/min [NII]Nb ? Intensity of blueshifted [NII] 6584
([NII]6584Nb, in km/s/min)
105-110 F6.2 km/s [NII]RVb ? Radial velocity of blueshifted
[NII] 6584 ([NII]6584RVb)
112-116 F5.2 km/s [NII]sigmab ? Gaussian width of blueshifted
[NII] 6584 ([NII]6584sigmab)
118-125 F8.2 km/s/min [NII]Nr ? Intensity of redshifted [NII] 6584
([NII]6584Nr, in km/s/min)
127-132 F6.2 km/s [NII]RVr ? Radial velocity of redshifted
[NII] 6584 ([NII]6584RVr)
134-138 F5.2 km/s [NII]sigmar ? Gaussian width of redshifted
[NII] 6584 ([NII]6584sigmar)
140-147 F8.2 km/s/min HeINb ? Intensity of blueshifted
HeI 6678 (HeI6678Nb, in km/s/min)
149-154 F6.2 km/s HeIRVb ? Radial velocity of blueshifted
HeI 6678 (HeI6678RVb)
156-160 F5.2 km/s HeIsigmab ? Gaussian width of blueshifted
HeI 6678 (HeI6678sigmab)
162-169 F8.2 km/s/min HeINr ? Intensity of redshifted HeI 6678
(HeI6678Nr, in km/s/min)
171-176 F6.2 km/s HeIRVr ? Radial velocity of redshifted
HeI 6678 (HeI6678RVr)
178-182 F5.2 km/s HeIsigmar ? Gaussian width of redshifted
HeI 6678 (HeI6678sigmar)
184-191 F8.2 km/s/min [SII]1Nb ? Intensity of blueshifted [SII] 6717
([SII]6717Nb, in km/s/min)
193-198 F6.2 km/s [SII]1RVb ? Radial velocity of blueshifted
[SII] 6717 ([SII]6717RVb)
200-204 F5.2 km/s [SII]1sigmab ? Gaussian width of blueshifted
[SII] 6717 ([SII]6717sigmab)
206-213 F8.2 km/s/min [SII]1Nr ? Intensity of redshifted [SII] 6717
([SII]6717Nr, in km/s/min)
215-220 F6.2 km/s [SII]1RVr ? Radial velocity of redshifted
[SII] 6717 ([SII]6717RVr)
222-226 F5.2 km/s [SII]1sigmar ? Gaussian width of redshifted
[SII] 6717 ([SII]6717sigmar)
228-235 F8.2 km/s/min [SII]2Nb ? Intensity of blueshifted [SII] 6731
([SII]6731Nb, in km/s/min)
237-242 F6.2 km/s [SII]2RVb ? Radial velocity of blueshifted
[SII] 6731 ([SII]6731RVb)
244-248 F5.2 km/s [SII]2sigmab ? Gaussian width of blueshifted
[SII] 6731 ([SII]6731sigmab)
250-257 F8.2 km/s/min [SII]2Nr ? Intensity of redshifted [SII] 6731
([SII]6731Nr, in km/s/min)
259-264 F6.2 km/s [SII]2RVr ? Radial velocity of redshifted
[SII] 6731 ([SII]6731RVr)
266-270 F5.2 km/s [SII]2sigmar ? Gaussian width of redshifted
[SII] 6731 ([SII]6731sigmar)
272-281 A10 --- Setup Type of spectrum/setup (1) <#sRM3.1>
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*Note (1)*: Type of spectrum/setup as follows:
sky_HR15N = nebular spectrum from skyfibre, Giraffe setup HR15N
sky_HR14 = nebular spectrum from skyfibre, Giraffe setup HR14A
star_HR15N = nebular spectrum from star fibre, Giraffe setup HR15N
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*Acknowledgements*:
Francesco Damiani, damiani(at)oapa.inaf.it
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*(End)* Francesco Damiani [INAF-OAPA], Patricia Vannier [CDS] 05-Apr-2016
/The document above follows the rules of the Standard Description for
Astronomical Catalogues ; from
this documentation it is possible to generate *f77* program to load
files into arrays
or line by line
/
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