Pressemeddelelse
Et flammende drama af stjernefødsel og -død
27. november 2013
Den Store Magellanske Sky er en af de galakser, der ligger tættest på vores egen. Astronomer har nu brugt ESOs kraftfulde Very Large Telescope til at udforske en af den mindre kendte regioner. Dette nye billede viser skyer af gas og støv, hvor varme nye stjerner fødes og omdanner deres omgivelser til mærkelige figurer. Dette billede viser dog også effekterne efter stjerners død - filamenter der skabes af en supernovaeksplosion.
I en afstand på 160.000 lysår (eso1311) ligger en af vores tætte galaksenaboer den Store Magellanske Sky i stjernebilledet Dorado (Sværdfisken). Der dannes aktivt nye stjerner i områder, der er så klare, at nogle endda kan ses med det blotte øje fra Jorden, dette gælder f.eks. Taranteltågen (eso1033). Dette nye billede der er taget med ESOs Very Large Teleskope på Paranal-observatoriet i Chile, undersøger et område kaldet NGC 2035 (til højre), der nogle gange kaldes ved sit kælenavn Dragehovedtågen.
NGC 2035 er en HII region - også kaldet en emissionståge. Den består af skyer af gas der gløder på grund af den energirige stråling, der udsendes fra unge stjerner. Denne stråling flår elektronerne væk fra atomerne inde i skyen, og når de rekombinerer med andre atomer frigiver de lys. Inde i gassen er mørke klumper af støv, der absorberer snarere end udsender lys, hvilket skaber lange baner af mørke figurer langs stjernetågen.
Filamentformerne i venstre side af billedet, er ikke et resultat af stjernefødsel, men rettere stjernedød. De blev skabt af en af de mest voldelige begivenheder, der kan forekomme i universet - en supernovaeksplosion [1]. Disse eksplosioner er så klare, at de ofte for en kort tid, overstråler hele deres hjemgalakse, før de falmer over flere uger eller måneder (se også eso1315 og potw1323a).
Når vi kigger på dette billede, er det måske svært at begribe, hvor store disse skyer er, men de er altså flere hundrede lysår på tværs. Og de ligger ikke i vores egen galakse, men langt udenfor. Den Store Magellanske Sky er enorm, men når den sammenlignes med vores egen galakse, har den en meget beskeden udstrækning, kun på omkring 14.000 lysår - ti gange mindre end Mælkevejen.
Dette billede blev taget ved brug af FOcal Reducer and low dispersion Spectrograph instrumentet der er fastsat på ESOs Very Large Telescope, der ligger på Paranal-observatoriet i Chile. Billedet er den del af ESOs Cosmic Gems projektet [2].
Noter
[1] Efterladenskaberne fra den supernovaeksplosion der kan ses i dette billede kaldes SNR 0536-67.6.
[2] ESO Cosmic Gems programme er et initiativ, der forsøger at tage billeder af nogle interessante, spændende eller æstetiske objekter med ESOs teleskoper, med uddannelses- og formidlingsformål. Dette projekt bruger observationstider på teleskoperne, der ikke kan bruges til videnskabelige observationer. Al den data der samles kan måske også bruges videnskabeligt og er gjort tilgængeligt til forskere igennem ESOs videnskabsarkiv.
Mere information
ESO, det Europæiske Syd Observatorium, er den mest fremtrædende internationale astronomi-organisation i Europa og verdens mest produktive astronomiske observatorium. ESO har i dag følgende 14 medlemslande: Belgien, Danmark, Finland, Frankrig, Holland, Italien, Portugal, Schweiz og Storbritannien, Spanien, Sverige, Tjekkiet, Tyskland og Østrig. Flere lande har udtrykt interesse i medlemskab. ESO’s aktiviteter er fokuseret på design, konstruktion og drift af jordbaserede observationsfaciliteter for astronomi for at muliggøre vigtige videnskabelige opdagelser. ESO spiller også en ledende rolle for at fremme og organisere samarbejdet inden for astronomisk forskning. I Chile driver ESO tre unikke observatorier i verdensklasse: La Silla, Paranal og Chajnantor. På Paranal driver ESO Very Large Telescope (VLT), der er verdens mest avancerede astronomiske observatorium til observationer i synligt lys. ESO er den europæiske partner i et revolutionerede astronomisk teleskop kaldet ALMA, det største igangværende astronomiske projekt. ESO planlægger i øjeblikket et 42 meter optisk/nær-infrarødt teleskop kaldet European Extremely Large Telescope (E-ELT), der vil blive ”verdens største øje mod himlen”.
Links
Kontakter
Richard Hook
ESO Public Information Officer
Garching bei München, Germany
Tel: +49 89 3200 6655
Mobil: +49 151 1537 3591
E-mail: rhook@eso.org
Ole J. Knudsen (Pressekontakt Danmark)
ESOs formidlingsnetværk
og Aarhus Space Centre, Aarhus Universitet
Aarhus, Danmark
Tel: +45 8715 5597
E-mail: eson-denmark@eso.org
Om pressemeddelelsen
| Pressemeddelelse nr.: | eso1348da |
| Navn: | NGC 2035 |
| Type: | Local Universe : Nebula : Type : Star Formation |
| Facility: | Very Large Telescope |
Billeder
Our use of Cookies
We use cookies that are essential for accessing our websites and using our services. We also use cookies to analyse, measure and improve our websites’ performance, to enable content sharing via social media and to display media content hosted on third-party platforms.
ESO Cookies Policy
The European Organisation for Astronomical Research in the Southern Hemisphere (ESO) is the pre-eminent intergovernmental science and technology organisation in astronomy. It carries out an ambitious programme focused on the design, construction and operation of powerful ground-based observing facilities for astronomy.
This Cookies Policy is intended to provide clarity by outlining the cookies used on the ESO public websites, their functions, the options you have for controlling them, and the ways you can contact us for additional details.
What are cookies?
Cookies are small pieces of data stored on your device by websites you visit. They serve various purposes, such as remembering login credentials and preferences and enhance your browsing experience.
Categories of cookies we use
Essential cookies (always active): These cookies are strictly necessary for the proper functioning of our website. Without these cookies, the website cannot operate correctly, and certain services, such as logging in or accessing secure areas, may not be available; because they are essential for the website’s operation, they cannot be disabled.
Functional Cookies: These cookies enhance your browsing experience by enabling additional features and personalization, such as remembering your preferences and settings. While not strictly necessary for the website to function, they improve usability and convenience; these cookies are only placed if you provide your consent.
Analytics cookies: These cookies collect information about how visitors interact with our website, such as which pages are visited most often and how users navigate the site. This data helps us improve website performance, optimize content, and enhance the user experience; these cookies are only placed if you provide your consent. We use the following analytics cookies.
Matomo Cookies:
This website uses Matomo (formerly Piwik), an open source software which enables the statistical analysis of website visits. Matomo uses cookies (text files) which are saved on your computer and which allow us to analyze how you use our website. The website user information generated by the cookies will only be saved on the servers of our IT Department. We use this information to analyze www.eso.org visits and to prepare reports on website activities. These data will not be disclosed to third parties.
On behalf of ESO, Matomo will use this information for the purpose of evaluating your use of the website, compiling reports on website activity and providing other services relating to website activity and internet usage.
Matomo cookies settings:
Additional Third-party cookies on ESO websites: some of our pages display content from external providers, e.g. YouTube.
Such third-party services are outside of ESO control and may, at any time, change their terms of service, use of cookies, etc.
YouTube: Some videos on the ESO website are embedded from ESO’s official YouTube channel. We have enabled YouTube’s privacy-enhanced mode, meaning that no cookies are set unless the user actively clicks on the video to play it. Additionally, in this mode, YouTube does not store any personally identifiable cookie data for embedded video playbacks. For more details, please refer to YouTube’s embedding videos information page.
Cookies can also be classified based on the following elements.
Regarding the domain, there are:
- First-party cookies, set by the website you are currently visiting. They are stored by the same domain that you are browsing and are used to enhance your experience on that site;
- Third-party cookies, set by a domain other than the one you are currently visiting.
As for their duration, cookies can be:
- Browser-session cookies, which are deleted when the user closes the browser;
- Stored cookies, which stay on the user's device for a predetermined period of time.
How to manage cookies
Cookie settings: You can modify your cookie choices for the ESO webpages at any time by clicking on the link Cookie settings at the bottom of any page.
In your browser: If you wish to delete cookies or instruct your browser to delete or block cookies by default, please visit the help pages of your browser:
Please be aware that if you delete or decline cookies, certain functionalities of our website may be not be available and your browsing experience may be affected.
You can set most browsers to prevent any cookies being placed on your device, but you may then have to manually adjust some preferences every time you visit a site/page. And some services and functionalities may not work properly at all (e.g. profile logging-in, shop check out).
Updates to the ESO Cookies Policy
The ESO Cookies Policy may be subject to future updates, which will be made available on this page.
Additional information
For any queries related to cookies, please contact: pdprATesoDOTorg.
As ESO public webpages are managed by our Department of Communication, your questions will be dealt with the support of the said Department.