Comparação de diferentes imagens da galáxia NGC 4303
Nesta comparação vemos duas imagens de NGC 4303, uma galáxia em espiral com uma barra de estrelas e gás no seu centro, situada a aproximadamente 55 milhões de anos-luz de distância da Terra na constelação da Virgem. As imagens foram obtidas a diferentes comprimentos de onda da luz e as observações foram levadas a cabo com o instrumento MUSE (Multi-Unit Spectroscopic Explorer), montado no Very Large Telescope (VLT) do ESO, e com o Atacama Large Millimeter/submillimeter Array (ALMA), do qual o ESO é um parceiro.
A imagem da esquerda mostra dados MUSE. O brilho dourado corresponde a nuvens de hidrogénio, oxigénio e enxofre ionizados, que assinalam a presença de estrelas recém nascidas, enquanto as regiões azuladas no fundo revelam a distribuição de estrelas jovens.
No lado direito, a imagem MUSE é sobreposta por dados rádio do ALMA (a laranja-acastanhado), revelando-se assim as nuvens frias de gás molecular, as maternidades estelares onde as estrelas nascem.
Ao sobrepôr imagens MUSE e ALMA, os astrónomos podem examinar regiões galácticas onde as estrelas se estão a formar e compará-las aos locais onde se espera que ocorra esta formação, tentando deste modo compreender melhor o que ativa, estimula ou trava o nascimento de novas estrelas.
E toda a gente pode experimentar! Desloque a pequena barra verde com o rato para tentar desvendar os segredos da NGC 4303, descobrindo onde se estão a formar estrelas como o esperado e onde isto não está a acontecer. Vê algumas regiões na galáxia onde algo parece estar a travar a formação estelar?
Créditos
ESO/ALMA (ESO/NAOJ/NRAO)/PHANGS
Sobre a comparação de imagens
| Id: | eso2110a |
| Data de divulgação: | 16 de Julho de 2021 às 14:00 |
| Notícias relacionadas: | eso2110 |
Imagens
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