Gemini News Archive

Tightening the (Asteroid) Belt around Zeta Leporis

New mid-infrared images of the Zeta Leporis circumstellar disk obtained with T-ReCS on Gemini South have for the first time revealed what researchers are calling an "exo-asteroid belt" around another star.

Some Rare Abnormal Stars may have White Dwarf Parents to Blame

Astronomers have announced the discovery of huge quantities of an unusual variety of oxygen in two very rare types of stars, suggesting that the origin of these oddball stars may lie in the physics behind the mergers of white dwarf star pairs.

Small Warm Doughnut Feeds Theories of Extragalactic Black Holes

An international team of astronomers used a novel approach to peer deeply into the energetic core of the nearby galaxy Centaurus A and set stringent constraints on its size and characteristics, indicating that it is likely quite petite and clumpy.

Gemini Welcomes the New Year with "Wide Eyes"

The images were obtained as part of a program to capture a time-lapse sequence of the Gemini telescopes in operation during the course of one night.

Nature's Tiniest Stellar Twins

A team of US astronomers has just released the results of a search for low-mass brown dwarf or planetary companions around young early-type M dwarf stars within 20 parsecs of the Sun.

Near Infrared Spectra Constrain an Extraordinary Pair of Cosmic Dwarves

An extremely rare stellar system composed of a white dwarf and brown dwarf pair, WD 0137-349 is the only known close, detached binary system with a white dwarf and a confirmed substellar companion.

Gemini North Recovers from Earthquake

Distant carbon atoms betray very early enrichment in the young universe

Robert A. Simcoe of the MIT has found new evidence of intensive heavy-element enrichment in intergalactic gas, occurring less than 1 billion years (Gyr) after the Big Bang, with the help of GNIRS at Gemini South.

Resolving the Hearts of Luminous Infrared Galaxies

An international team of researchers used Gemini mid-infrared images to investigate a sample of nearby Luminous InfraRed Galaxies (LIRGs).

Hawai'i Earthquake Update for Gemini North

Hidden Mass Concentration Near the Center of Starbursting Galaxy M83

Using CIRPASS at Gemini South, Ruben Diaz and an international team of astronomers have discovered a previously unknown hidden mass concentration that looks like a second nucleus in the starburst galaxy M83.

Understanding The Nature of a Distant Short GRB

Alicia M. Soderberg (CALTECH) and her collaborators have studied the GRB 051221a and its afterglow in great detail using several datasets provided by space observations, radio observations with the VLA and optical observations with Gemini.

Stellar birth control at high redshift

An international team has found that 45% of a small sample (20) of massive high-redshift galaxies exhibit very low or no star formation activity.

Dissecting the Universe's Great Power Stations

Hai Fu and Alan Stockton of the Institute for Astronomy (University of Hawai'i) recently constructed velocity maps of the gas in the EELR around the quasar (which is at a redshift of z=0.31) using the Gemini Multi-Object Spectrograph on Gemini North. 

Does IRS-8 contain the youngest and most massive star in the Galactic Center?

A team of astronomers has proven that the star at the core of a spectacular cosmic bow shock near the Galactic Center is indeed an evolved massive star.

Gemini Captures Close Encounter of Jupiter's Red Spots

Gemini North adaptive optics image of Jupiter and its two red spots (which appear white because this  is a near-infrared image; in visible light they appear reddish).

Big Cluster Elliptical Galaxies Formed First

Astronomers have just released new Gemini/HST results confirming that big galaxies form first and smaller ones later.

THE EARLY UNIVERSE IS DUSTY, AND ASTRONOMERS FINALLY KNOW WHY

Massive star supernovae have been major "dust factories" ever since the first generations of stars formed several hundred million years after the Big Bang, according to an international study.

GEMINI PROBES THE CENTER OF ANDROMEDA GALAXY WITH UNPRECEDENTED CLARITY

Gemini observations reveal an intriguing dust-enshrouded star near the core of the galaxy M31, while extremely sharp adaptive optics images allowed the analysis of thousands of individual stars that indicates a long-stable environment around the galaxy’s core.  

A Tale of Two Nebulae

Two new images from Gemini Observatory released today show a pair of beautiful nebulae that were created by two very different types of stars at what may be similar points in their evolutionary timelines.

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