Results tagged “astrochemistry”

It is well-known that stars with giant planets are on average more metal-rich than stars without giant planets, whereas stars with detected low-mass planets do not need to be metal-rich.

The nitrogen to carbon (N/C) and nitrogen to oxygen (N/O) ratios are the most sensitive quantities to mixing in stellar interiors of intermediate and massive stars.

In this work, we studied the stability of the glycine molecule in the crystalline zwitterion form, known as {alpha}-glycine (+ NH3 CH2 COO− ) under action of heavy cosmic ray analogs.

By obtaining images and spectra at the same light echo position between 2011 and 2014, we follow the evolution of the Great Eruption on a three-year timescale.

While it is well recognized that interstellar grains are made of amorphous silicates and some form of carbonaceous materials, it remains debated regarding what exact chemical and physical form the carbonaceous component takes.

Emission from a class of benzene-based molecules known as Polycyclic Aromatic Hydrocarbons (PAHs) dominates the infrared spectrum of star-forming regions.

Broad infrared emission features (e.g., at 3.3, 6.2, 7.7, 8.6, and 11.3 microns) from the gas phase interstellar medium have long been attributed to polycyclic aromatic hydrocarbons (PAHs).

Polycyclic aromatic hydrocarbons (PAHs) have been observed in O-rich planetary nebulae towards the Galactic Bulge.

Protoplanetary disks are vital objects in star and planet formation, possessing all the material which may form a planetary system orbiting the new star.

While the origin of life remains mysterious, scientists are finding more and more evidence that material created in space and delivered to Earth by comet and meteor impacts could have given a boost to the start of life.

Polycyclic aromatic hydrocarbons (PAHs) are some of the major dust components in the interstellar medium (ISM).

Volatiles in Protoplanetary Disks

Volatiles are compounds with low sublimation temperatures, and they make up most of the condensible mass in typical planet-forming environments.

Spitzer Probes Weather on Brown Dwarfs

Swirling, stormy clouds may be ever-present on cool celestial orbs called brown dwarfs. New observations from NASA's Spitzer Space Telescope suggest that most brown dwarfs are roiling with one or more planet-size storms akin to Jupiter's "Great Red Spot."

Astrochemistry is a discipline that studies physico-chemical processes in astrophysical environments.

We present a new method to probe atmospheric pressure on Earthlike planets using (O2-O2) dimers in the near-infrared.

Cosmic rays may be linked to the formation of volatiles necessary for prebiotic chemistry.

Context: The dusty debris disk around the ~20 Myr old main-sequence A-star beta Pic is known to contain gas.

The Voyager 1 flyby of Titan in 1980 gave a first glimpse of the chemical complexity of Titan's atmosphere, detecting many new molecules with the infrared spectrometer (IRIS). These included propane (C3H8) and propyne (CH3C2H), while the intermediate-sized C3Hx hydrocarbon (C3H6) was curiously absent. Using spectra from the Composite Infrared Spectrometer (CIRS) on Cassini, we show the first positive detection of propene (C3H6) in Titan's stratosphere (5-sigma significance), finally filling the three-decade gap in the chemical sequence.

Scientists have discovered a 'cosmic factory' for producing the building blocks of life, amino acids, according to research.

New research has revealed that chemical reactions previously thought to be 'impossible' in space actually occur 'with vigour,' a discovery that could ultimately change our understanding of how alcohols are formed and destroyed in space - and which could also mean that places like Saturn's moon Titan, once considered too cold for life to form, may have a shortcut for biochemical reactions.

« Previous  1 2