Ficheiro:NGC 5044 (Chandra - Herschel) nhsc2014-003c.jpg
![Ficheiro:NGC 5044 (Chandra - Herschel) nhsc2014-003c.jpg](http://upload.wikimedia.org/wikipedia/commons/thumb/4/47/NGC_5044_%28Chandra_-_Herschel%29_nhsc2014-003c.jpg/600px-NGC_5044_%28Chandra_-_Herschel%29_nhsc2014-003c.jpg)
Imagem numa resolução maior (690 × 690 píxeis, tamanho: 105 kB, tipo MIME: image/jpeg)
![]() |
Esta imagem provém do Wikimedia Commons, um acervo de conteúdo livre da Wikimedia Foundation que pode ser utilizado por outros projetos.
|
Descrição do ficheiro
DescriçãoNGC 5044 (Chandra - Herschel) nhsc2014-003c.jpg |
English: This image shows a composite view of the giant elliptical galaxy NGC 5044.The stellar component, as observed at optical wavelengths, is shown in white at the centre of the image. The other stars scattered around the image are foreground stars from our own Galaxy.The galaxy is embedded in a hot atmosphere of ionised hydrogen gas, which is shown in blue. With temperatures up to tens of millions of K, the hot gas shines brightly in X-rays and was observed using NASA's Chandra X-ray Observatory.Observations show that some of the hot gas cools down and flows towards the centre of the galaxy. There, the cold gas may condense and form stars, unless it is reheated or expelled from the galaxy by other agents.The filamentary network shown in red is warm hydrogen gas, as observed in the H-alpha emission line at a rest wavelength of 656.28 nm with the Southern Observatory for Astrophysical Research (SOAR) telescope in Chile.When observed in radio wavelengths, this galaxy appears only as the weak source shown in violet at the centre of the image, which belies the moderately active black hole sitting at the centre of the galaxy. The radio observations were performed with NRAO's Very Large Array (VLA).A team of astronomers has observed NGC 5044 and other nearby giant elliptical galaxies using ESA's Herschel Space Observatory, to try to figure out why galaxies of this type do not form stars. Spectroscopic observations obtained with Herschel showed that, contrary to previous belief, NGC 5044 contains plenty of cold gas – the raw material to form stars. The same holds true for most of the giant elliptical galaxies that the team observed.A multi-wavelength study suggests that, while hot gas cools down in these galaxies, stars do not form because of feedback from the central supermassive black hole, which stirs up the gas preventing it from turning into stars. |
Data | |
Origem | http://www.herschel.caltech.edu/system/avm_image_sqls/binaries/137/page/nhsc2014-003c.jpg?1393349390 |
Autor | NASA Chandra/Digitised Sky Survey/Southern Observatory for Astrophysical Research/Very Large Array |
Licenciamento
Public domainPublic domainfalsefalse |
![]() |
Este ficheiro está no domínio público nos Estados Unidos porque foi criado exclusivamente pela NASA. As orientações sobre o direito de autor da NASA são que «as obras da NASA não têm os direitos de autor protegidos salvo indicação em contrário». Veja Template:PD-USGov, as orientações sobre o direito de autor da NASA ou as normas de uso de imagens do Laboratório de Propulsão a Jato (Jet Propulsion Lab, JPL). | ![]() |
![]() |
Avisos:
|
Legendas
Elementos retratados neste ficheiro
retrata
24 fevereiro 2014
Histórico do ficheiro
Clique uma data e hora para ver o ficheiro tal como ele se encontrava nessa altura.
Data e hora | Miniatura | Dimensões | Utilizador | Comentário | |
---|---|---|---|---|---|
atual | 19h32min de 17 de março de 2016 | ![]() | 690 × 690 (105 kB) | Mylkomeda | User created page with UploadWizard |
Utilização local do ficheiro
A seguinte página usa este ficheiro:
Utilização global do ficheiro
As seguintes wikis usam este ficheiro:
- en.wikiversity.org
- it.wikipedia.org
Metadados
Este ficheiro contém informação adicional, provavelmente adicionada a partir da câmara digital ou scanner utilizada para criar ou digitalizar a imagem. Caso o ficheiro tenha sido modificado a partir do seu estado original, alguns detalhes poderão não refletir completamente as mudanças efetuadas.
Data e hora de geração de dados | 25 de fevereiro de 2014 |
---|---|
Largura | 973 px |
Altura | 1 024 px |
Bits por componente |
|
Composição do píxel | RGB |
Número de componentes | 3 |
Resolução horizontal | 72 ppp |
Resolução vertical | 72 ppp |
Espaço de cores | sRGB |
Largura da imagem | 973 px |
Altura da imagem | 1 024 px |
Informação de contacto |
http://www.herschel.caltech.edu/ 1200 E. California Blvd. Pasadena, CA, 91125 USA |
Título |
|
Título curto |
|
Atribuição/Fornecedor | Digitised Sky Survey/NASA Chandra/Southern Observatory for Astrophysical Research/Very Large Array (Robert Dunn et al. 2010) |
Título | This image shows a composite view of the giant elliptical galaxy NGC 5044. |
Fonte | NASA Herschel Science Center |
Condições de utilização |
|
Data e hora de modificação do ficheiro | 23h26min de 24 de fevereiro de 2014 |
Software utilizado | Adobe Photoshop CS3 Macintosh |
Data e hora de digitalização | 23h26min de 24 de fevereiro de 2014 |
Data da última modificação dos metadados | 23h26min de 24 de fevereiro de 2014 |
Versão IIM | 7 |
Comentário de ficheiro JPEG | This image shows a composite view of the giant elliptical galaxy NGC 5044.
The stellar component, as observed at optical wavelengths, is shown in white at the centre of the image. The other stars scattered around the image are foreground stars from our own Galaxy. The galaxy is embedded in a hot atmosphere of ionised hydrogen gas, which is shown in blue. With temperatures up to tens of millions of K, the hot gas shines brightly in X-rays and was observed using NASA's Chandra X-ray Observatory. Observations show that some of the hot gas cools down and flows towards the centre of the galaxy. There, the cold gas may condense and form stars, unless it is reheated or expelled from the galaxy by other agents. The filamentary network shown in red is warm hydrogen gas, as observed in the H-alpha emission line at a rest wavelength of 656.28 nm with the Southern Observatory for Astrophysical Research (SOAR) telescope in Chile. When observed in radio wavelengths, this galaxy appears only as the weak source shown in violet at the centre of the image, which belies the moderately active black hole sitting at the centre of the galaxy. The radio observations were performed with NRAO's Very Large Array (VLA). A team of astronomers has observed NGC 5044 and other nearby giant elliptical galaxies using ESA's Herschel Space Observatory, to try to figure out why galaxies of this type do not form stars. Spectroscopic observations obtained with Herschel showed that, contrary to previous belief, NGC 5044 contains plenty of cold gas Ð the raw material to form stars. The same holds true for most of the giant elliptical galaxies that the team observed. A multi-wavelength study suggests that, while hot gas cools down in these galaxies, stars do not form because of feedback from the central supermassive black hole, which stirs up the gas preventing it from turning into stars. |