Publications by authors named "J A Calanog"
Stellar archaeology shows that massive elliptical galaxies formed rapidly about ten billion years ago with star-formation rates of above several hundred solar masses per year. Their progenitors are probably the submillimetre bright galaxies at redshifts z greater than 2. Although the mean molecular gas mass (5 × 10(10) solar masses) of the submillimetre bright galaxies can explain the formation of typical elliptical galaxies, it is inadequate to form elliptical galaxies that already have stellar masses above 2 × 10(11) solar masses at z ≈ 2.
View Article and Find Full Text PDFArticle Synopsis
- Present-day massive early-type galaxies likely formed their stellar mass and elements from intense starburst events in early dark-matter haloes.
- Recent studies suggest that previously measured redshift distributions of dusty starbursts may be biased low, but new observations have identified a massive starburst galaxy at a redshift of z = 6.34.
- This galaxy contains a vast amount of excited interstellar material and is converting gas into stars at a rate over 2,000 times greater than that of our Milky Way, indicating that intense star formation was possible just 880 million years post-Big Bang.