Gemini News Archive

Are "Fossil Groups" Morphed from Cannibalized Galaxies?

A team studied the dynamical properties of CG 6, a massive compact group at a redshift z=0.22, that has several properties in common with known fossil groups. The study is based on multicolor imaging and deep spectroscopic observations obtained with GMOS at Gemini South.

Most Massive Stellar Black Hole Found

Observations that combine data from the ground-based Gemini North telescope and NASA’s orbiting Chandra X-ray observatory have led to the discovery of the most massive known stellar black hole.

The Gemini Deep Planet Survey - First Results

A Canada-US-UK team has released the first results from the Gemini Deep Planet Survey (GDPS), a near-infrared adaptive optics search for giant planets and brown dwarfs around 85 nearby young stars.

The 400th Gemini Paper

Most Distant Quasar Samples Conditions in the Young Universe

The GMOS South spectra were taken in the nod-and-shuffle mode, necessary to measure the weak residual flux at wavelengths shorter than the Lyman emission line in order to determine the absorption by neutral hydrogen.

Quasar Pairs Reveal Distant Galaxy Clusters

An international team of researchers has shown that quasar pairs may be excellent beacons for finding clusters of galaxies in the early universe.

Gemini's Impact on Deep Impact

By observing the comet Tempel 1 pre-, and post-impact, the Harker team gathered baseline data sets with MICHELLE on Gemini North to compare with data obtained during the moments surrounding impact.

NIFS Dissects the Heart of HL Tauri's Jet

A team used the adaptive optics fed integral-field spectrograph NIFS on Gemini North to explore the inner structure of the jet in the young star HL Tau, located about 460 light years away in the constellation of Taurus.

Uncovering a Missing Link Between Dwarf Galaxies and Globular Clusters

Deep Gemini imaging of the cluster of galaxies Hydra I at a distance of 176 million light-years has revealed an abundance of massive luminous metal-rich globular clusters that appears to impersonate ultra-compact dwarf galaxies.

Frenetic growth of supermassive black holes in the early universe

The six distant quasars a team observed are at redshifts ranging between z = 5.8 to 6.3 and correspond to a period when the universe was only about one billion years old. Using GNIRS at Gemini South and NIRI at Gemini North, the team found these very young quasars to be already super-enriched in heavy elements.

Charon: An Ice Machine in the Ultimate Deep Freeze

NIRI observations with AO showed evidence of frigid geysers spewing material up through cracks in the crust of Pluto's companion Charon and recoating parts of its surface in ice crystals.

Young Stars Swim in Pools of Molecular Hydrogen

During a search for hydrogen emission in the disks of young stars, UK astronomers have discovered a massive layer of hot gas around a low-mass M3-type star in the 6 million-year-old Eta Chamaeleontis cluster.

Astronomers Converge in Brazil for 2007 Gemini Science Meeting

Amidst the stunning beauty of the Foz do Iguaçu park and waterfalls in Brazil, more than 130 astronomers and staff from the seven-country Gemini partnership converged during the week of June 11th, 2007.

Discovery Narrows the Gap Between Planets and Brown Dwarfs

The coolest-known star-like object, called ULAS J0034-00 and located in the constellation Cetus, has a record-setting surface temperature of 600-700 K, cooler than any known solitary brown dwarf.

Distant and Massive Galaxy Cluster Revealed in Gemini Deep Deep Survey Field

Deep HST and Spitzer imaging of a passively evolving galaxy identified in the Gemini Deep Deep Survey (GDDS) has led to the detection of a very compact cluster of massive red galaxies at a redshift of z =1.51. 

GNIRS Recovery

For some unknown reason the GNIRS temperature controller failed, resulting in temperatures near 200° C for an undetermined period of time. After the initial inspection, it was obvious that some components were damaged, but many were clearly fine.

Most Massive Galaxies have Surprisingly Diverse Origins

An Australian team used the Gemini South Telescope to find that the most massive galaxies evolve through a variety of mechanisms which are dependent on the mass of their cluster environment.

Are Short Gamma-ray Bursts Cosmic Tricksters?

Analysis of nine short gamma-ray bursts (GRBs) observed with Gemini, Magellan, and the Hubble Space Telescope reveals that the progenitors of these GRBs may reside in faint host galaxies at redshifts of z = 1.1 and beyond.

Featherweight Celestial Pair Has Uncertain Future Together

Astronomers have serendipitously discovered a record-breaking pair of low-mass objects with an extreme orbital separation. The petite objects, each of which has a mass less than 100 times that of Jupiter, are separated by more than 5,000 times the distance between the Sun and Earth

The Delicate Trails of Star Birth

An image released today by the Gemini Observatory brings into focus a new and remarkably detailed view of supersonic "bullets" of gas and the wakes created as they pierce through clouds of molecular hydrogen in the Orion Nebula.