Planetary nebula spectra

[Jacques Montier]

Hi all

Here are two spectra of M27 and NGC 7662 planetary nebulae with Alpy 600 (0.5 A/pix)

M27 V 14.089

m27_fente.jpg (25.02 KiB) Viewed 4249 times

20150906-spectro_m27-1.png (54.31 KiB) Viewed 4249 times

20150906-spectro_m27-2.png (97.63 KiB) Viewed 4249 times

NGC 7662 V 12

ngc7662_fente.jpg (68.05 KiB) Viewed 4249 times

20150906-ngc7662-1.png (45.53 KiB) Viewed 4249 times

20150906-ngc7662-2.png (86.34 KiB) Viewed 4249 times

I noticed a strong line at about 3720 A ; what is the chemical element ? [OII] ? [SIII] ? blended line of both of them ?

Thanks for your advices.

Cheers,

[Francois Teyssier]

Beau travail Jacques, bien documenté ! Il faudrait également indiquer la zone dans laquelle tu a intégré le spectre.

Pour t'aider, voici la liste des identifications et intensités publiées pour NGC 7662
Il faudrait une mesure plus précise de la longueur d'onde.
Vu l'intensité, ce serait bien un blend [OII] 3726,3729

NGC 7662 3720.4 He II 1 0.19 H-beta no AKB
NGC 7662 3720.4 He II 1 0.144 H-beta yes AC79
NGC 7662 3721.69 [S III] 2 3.08 H-beta no AKB
NGC 7662 3721.7 [S III] 1 1.91 H-beta yes AC79
NGC 7662 3721.8 H I 2 3.6 H-beta no MA
NGC 7662 3721.8 [S III] 2 3.6 H-beta no MA
NGC 7662 3721.8 H I 2 4.2 H-beta no MA
NGC 7662 3721.8 [S III] 2 4.2 H-beta no MA
NGC 7662 3721.8 H I 2 3.7 H-beta no MA
NGC 7662 3721.8 [S III] 2 3.7 H-beta no MA
NGC 7662 3721.8 H I 1 3.1 H-beta no MA
NGC 7662 3721.94 H I 2 3.08 H-beta no AKB
NGC 7662 3726 [O II] 1 6.45 H-beta yes AC83
NGC 7662 3726 [O II] 1 1.8 other no LU
NGC 7662 3726 [O II] 1 5.6 H-beta no MA
NGC 7662 3726 [O II] 1 12.5 H-beta no MA
NGC 7662 3726 [O II] 1 6 H-beta no MA
NGC 7662 3726 [O II] 1 6 H-beta no MA
NGC 7662 3726 [O II] 1 5.92 H-beta no MI71
NGC 7662 3726.05 [O II] 1 6 H-beta no AKB
NGC 7662 3726.1 [O II] 1 6.03 H-beta yes AC79
NGC 7662 3727 [O II] 1 24 H-beta no A41
NGC 7662 3727 [O II] 1 3.5 H-beta yes B86
NGC 7662 3727 [O II] 1 5.7 H-beta yes B86
NGC 7662 3727 [O II] 1 10.5 H-beta yes B86
NGC 7662 3727 [O II] 1 27.9 H-beta yes B86
NGC 7662 3727 [O II] 1 6.7 H-beta yes FR1
NGC 7662 3727 [O II] 1 10 H-beta no LA
NGC 7662 3727 [O II] 1 19 H-beta no MA
NGC 7662 3727 [O II] 1 10.7 H-beta no MA
NGC 7662 3727 [O II] 1 22.2 H-beta yes MCWH
NGC 7662 3727 [O II] 1 7.41 H-beta no O
NGC 7662 3727 [O II] 1 11.7 H-beta no PTP
NGC 7662 3727 [O II] 1 7.9 H-beta no TAM
NGC 7662 3727 [O II] 1 14.3 H-beta yes VV1
NGC 7662 3728.8 [O II] 1 3.38 H-beta no AKB
NGC 7662 3728.8 [O II] 1 3.39 H-beta yes AC79
NGC 7662 3728.8 [O II] 1 3.1 H-beta no MA
NGC 7662 3728.8 [O II] 1 8.1 H-beta no MA
NGC 7662 3728.8 [O II] 1 4.1 H-beta no MA
NGC 7662 3728.8 [O II] 1 3.8 H-beta no MA
NGC 7662 3729 [O II] 1 3.65 H-beta yes AC83
NGC 7662 3729 [O II] 1 1 other no LU
NGC 7662 3729 [O II] 1 3.72 H-beta no MI71

"Catalog of Relative Emission Line Intensities Observed in Planetary Nebulae" (ELCAT for short)
ELCAT : ftp://ftp.noao.edu/catalogs/elcat/DATA/




François

[Jacques Montier]

Merci François,

Merci pour le catalogue !
J'ai repris le profil spectral de M27 et trouvé avec VisualSpec la longueur d'onde de 3725,73 A.
Dans le catalogue, j'ai les valeurs :
"NGC 6853" M 3722.00 "H I" 2 5.000 "H-beta" no AKI
"NGC 6853" M 3722.00 "[S III]" 2 5.000 "H-beta" no AKI
"NGC 6853" M 3726.00 "[O II]" 2 190.000 "H-beta" no AKI
"NGC 6853" M 3729.00 "[O II]" 2 190.000 "H-beta" no AKI

Il s'agit sans doute bien de [OII]