Šarlat a dým

Dýmově  černá silueta na tomto novém obrázku je součástí velkého řídkého oblaku částečně ionizovaného vodíku - HII oblasti - známé jako Gum 15. Na širokoúhlých záběrech mlhovina vypadá jako výrazný načervenalý až nafialovělý shluk posázený hvězdami a protínaný neprůhlednými prachovými čarami. Tento obrázek se soustředí na jednu prachovou čáru v centru mlhoviny.

Tyto tmavé části oblohy mají zdánlivě méně hvězd, protože prachové čáry zakrývají jasné svítící oblasti plynu. Hvězdy, které se v tmavých čarách občas objeví, se ve skutečnosti nacházejí mezi námi a mlhovinou Gum 15, i když vytvářejí iluzi, že se skrz okno díváme na vzdálenější nebe.

Gum 15 je tvarován silnými větry, které vanou z hvězd uvnitř a okolo mlhoviny. Oblak se nachází mezi několika velkými hvězdnými asociacemi, včetně hvězdokupy ESO 313-13. O nejjasnějším členu této hvězdokupy - hvězdě HD 74804 - se předpokládá, že ionizovala vodíkový oblak Gum 15. Ionizovaný vodík vytváří červeň, která proniká obrázkem.

Obrázek byl pořízen v rámci programu ESO Cosmic Gems[1] (Kosmické drahokamy) za pomoci zařízení FORS na velkém dalekohledu ESO (VLT) na observatoři Paranal v Chile. Uvedený program ve skutečnosti vytvořil více obrázků tohoto objektu - v červenci 2014 ESO uveřejnilo nádherný širokoúhlý snímek mlhoviny Gum 15 za pomoci širokoúhlé kamery na 2.2m dalekohledu MPG/ESO na observatoři La Silla. Tento širokoúhlý snímek detailně zobrazuje zvláštně vytvarovaná oblaka mlhoviny, temný prach a jasně svítící hvězdy. Část mlhoviny, která je znovu a s většími podrobnostmi zachycena na obrázku pořízeném VLT se nachází poblíž horní levé čtvrtiny na obrázku z 2.2m dalekohledu.

Poznámky
[1] Program "ESO Cosmic Gems" má za úkol vytvářet obrázky zajímavých, poutavých nebo vizuálně atraktivních objektů za pomoci dalekohledů ESO, za účelem vzdělávání a popularizace. Program využívá čas na dalekohledech, který se nedá použít pro vědecká pozorování. Všechna naměřená se dají použít i k vědeckým účelům a astronomové je mohou získat přes vědecký archív ESO.

Kredit:

ESO

O snímku

Id:potw1444a
Jazyk:cs
Typ:Pozorování
Datum zveřejnění:3. listopadu 2014 10:00
Velikost:3441 x 3556 px

O objektu

Jméno:Gum 15, Gum Nebula
Typ:Milky Way : Nebula : Appearance : Emission : H II Region
Constellation:Vela

Image Formats


Zvětšovatelný


Pozadí

1024x768
349,7 KB
1280x1024
668,5 KB
1600x1200
1,1 MB
1920x1200
1,3 MB
2048x1536
1,8 MB

Souřadnice

Position (RA):8 44 37.72
Position (Dec):-41° 18' 44.02"
Field of view:7.23 x 7.47 arcminutes
Orientace:Sever je 180.0° levá od svislé osy

Barvy & filtry

PásmoDalekohled
Optický
B
Very Large Telescope
FORS2
Optický
V
Very Large Telescope
FORS2
Optický
R
Very Large Telescope
FORS2
Optický
H-alpha
Very Large Telescope
FORS2
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