Home » Ciência » Espaço e Cosmos » AstrA?nomos descobrem galA?xia intacta desde o inAi??cio do Universo

AstrA?nomos descobrem galA?xia intacta desde o inAi??cio do Universo

Apenas uma de cada mil galA?xias maciAi??as Ai?? uma relAi??quia do Universo primitivo e conserva intactas as propriedades que tinha quando se formou hA? bilhAi??es anos

Santa Cruz de Tenerife, Espanha ai??i?? Pesquisadores do Instituto de AstrofAi??sica das CanA?rias (IAC), naAi??Espanha, confirmaram a primeira detecAi??A?o de uma galA?xia ai???relAi??quiaai???, que estA? intacta desde o comeAi??o do Universo, atravAi??s de imagens do telescA?pio espacial Hubble.

Os resultados da pesquisa foram publicados nesta segunda-feira na revista ai???Natureai??? e o IAC explicou que apenas uma de cada mil galA?xias maciAi??as Ai?? uma relAi??quia do Universo primitivo e conserva intactas as propriedades que tinha quando se formou hA? bilhAi??es anos.

Por isso, quando pesquisadores do IAC e da Universidade de La Laguna (ULL) Michael Beasley e Ignacio Trujillo localizaram esta galA?xia, solicitaram tempo de observaAi??A?o com o telescA?pio espacial Hubble para observar os aglomerados globulares que a cercavam e, assim, confirmar o que propunham os dados que eles tinham obtido com telescA?pios terrestres.

Os aglomerados globulares sA?o agrupamentos de estrelas que flutuam ao redor das galA?xias e se formaram junto destas durante o seu nascimento.

HA? dois tipos de populaAi??Ai??es de aglomerados globulares: os vermelhos, que nascem com as galA?xias maciAi??as, se encontram perto de seu centro e tA?m alto conteA?do de elementos mais pesados que o hAi??lio; e os azuis, com menor percentual metA?lico e que estA?o ao redor das galA?xias maciAi??as como consequA?ncia de terem absorvido outras galA?xias menores.

Os resultados da pesquisa mostraram que a galA?xia NGC 1277 sA? possui os aglomerados globulares vermelhos que se formaram com ela em seu nascimento e, desde entA?o, tem se mantido inalterada.

Os aglomerados globulares sA?o peAi??as muito sensAi??veis da histA?ria da formaAi??A?o das galA?xias, indicou em comunicado Michael Beasley, primeiro autor do artigo, que tambAi??m esclareceu que ai???Ai?? a primeira vez que se observa uma galA?xia tA?o maciAi??a com tA?o poucos aglomerados azuisai???.

A galA?xia NGC 1277 estA? composta por trilhAi??es de estrelas e recebe o seu nome do Novo CatA?logo Geral de Nebulosas e Aglomerados de Estrelas.

NGC 1277 fica na A?rea central do Aglomerado de Perseu, a maior concentraAi??A?o de galA?xias prA?ximas da Via LA?ctea e arredores.

O motivo pelo qual os pesquisadores pensam que esta galA?xia maciAi??a manteve sua forma original e sua composiAi??A?o intacta durante todo este tempo Ai?? porque ela se formou como satAi??lite da galA?xia central do aglomerado de Perseu, que absorveu qualquer material que poderia ter caAi??do sobre a NGC 1277 e provocado uma evoluAi??A?o diferente.

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