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NOAO News & Reports

July 11, 2017

Distant Galaxies ‘Lift the Veil’ on the End of the Cosmic Dark Ages

False color image of a 2 square degree region of the LAGER survey field, created from images taken in the optical at 500 nm (blue), in the near-infrared at 920 nm (red), and in a narrow-band filter centered at 964 nm (green). The last is sensitive to hydrogen Lyman alpha emission at z ~ 7. The small white boxes indicate the positions of the 23 LAEs discovered in the survey. The detailed insets (yellow) show two of the brightest LAEs; they are 0.5 arcminutes on a side, and the white circles are 5 arcseconds in diameter. Image Credit: Zhen-Ya Zheng (SHAO) & Junxian Wang (USTC).

A study of the distant Universe finds that small star-forming galaxies were abundant when the Universe was only only 800 million years old, a few percent of its present age. The results suggest that the earliest galaxies, which illuminated and ionized the Universe, formed at even earlier times. The study was carried out by an international team, including NOAO astronomer Alistair Walker, using the Dark Energy Camera on the CTIO Blanco telescope.

Read more in NOAO Press Release 17-03.

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June 5, 2017

Blowing the Cover of a Hidden Black Hole

Color image of the barred spiral galaxy NGC 7582 which hosts a hidden black hole. MUSE observations (inset) reveal emission from a hot gaseous wind (in green) that is ionized and launched by the black hole. Image Credits: Stefan Binnewies and Josef Pöpsel of Capella Observatory (background image); Stephanie Juneau of NOAO and CEA-Saclay (inset).

The nearby galaxy NGC 7582 is an extreme example of an “obscured AGN”, a galaxy with an accreting supermassive black hole that is deeply enshrouded in gas and dust. New observations show that the black hole launches a powerful wind, which is confined by a rotating ring of gas and dust 2000 light years in diameter. The ring also contributes to the extreme obscuration of the black hole. The results, reported by a team led by NOAO astronomer Stephanie Juneau, lend new insights into the interaction between black holes and their host galaxies.

Read more in NOAO Press Release 17-02.

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May 17, 2017

Punching Above Its Weight, a Brown Dwarf Launches a Parsec-Scale Jet

The HH 1165 jet launched by a brown dwarf in the outer periphery of the sigma Ori cluster. Traced by emission from singly ionized sulfur, which appears green in the image, the jet extends 0.7 light years (equivalent to 0.2 parsecs) northwest of the brown dwarf.

Astronomers using the SOAR telescope at CTIO have discovered a spectacular extended jet from a young brown dwarf. While young stars are known to launch jets that extend over a light year or more, this is the first such jet from a brown dwarf. The discovery, made by a team that includes NOAO astronomers Cesar Briceno and Steve Heathcote, lends new insight into how substellar objects form.

Read more in NOAO Press Release 17-01.

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June 20, 2016

Young Super-Neptune Offers Clues to the Origin of Close-In Exoplanets

Image Credit: NASA/JPL-Caltech

A team of astronomers has confirmed the existence of a young planet, only 11 million years old, that orbits very close to its star (at 0.05 AU), with an orbital period of 5.4 days. Approximately 5 times the size of the Earth, the new planet is a “super-Neptune” and the youngest such planet known. Observations with ARCoIRIS, the new infrared spectrograph on the 4-m Blanco telescope at the Cerro Tololo Inter-American Observatory (CTIO), played a critical role in measuring the size of the planet. NOAO astronomer David James is a coauthor on the study.

Read more in NOAO Press Release 16-02

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May 25, 2016

Young Mammoth Cluster of Galaxies Sighted in the Early Universe

Image Credit: Dr. Rui Xue, Purdue University

Astronomers have uncovered evidence for a vast collection of young galaxies 12 billion light years away. The newly discovered “proto-cluster” of galaxies, observed when the universe was only 1.7 billion years old (12% of its present age), is one of the most massive structures known at that distance. The discovery was made using telescopes at KPNO and Keck Observatory. NOAO Astronomer Arjun Dey is the lead author of the study.

Read more in NOAO Press Release 16-01.

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