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HD 142527 (Star)


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HD 142527
Star (星)

星座 (Constellation)
おおかみ座 (Lup) (Lupus)


距離 (Distance)
450光年 (450 light-years)

HD 142527 is a star located 450 light years from the Earth in the constellation Lupus.

HD 142527 (Star) : Picture

HD 142527
ALMA observations of the disc and gas streams around HD 142527
(C) ESO
Observations made with the Atacama Large Millimeter/submillimeter Array (ALMA) telescope of the disc of gas and cosmic dust around the young star HD 142527, showing vast streams of gas flowing across the gap in the disc. These are the first direct observations of these streams, which are expected to be created by giant planets guzzling gas as they grow, and which are a key stage in the birth of giant planets.

The dust in the outer disc is shown in red. Dense gas in the streams flowing across the gap, as well as in the outer disc, is shown in green. Diffuse gas in the central gap is shown in blue. The gas filaments can be seen at the three o'clock and ten o'clock positions, flowing from the outer disc towards the centre. The dense gas observed is HCO+, and the diffuse gas is CO. The outer disk is roughly two light-days across. If this were our own Solar System, the Voyager 1 probe — the most distant manmade object from Earth — would be at approximately the inner edge of the outer disk.

HD 142527
Artist’s impression of the disc and gas streams around HD 142527
(C) ESO
This artist’s impression shows the disc of gas and cosmic dust around the young star HD 142527. Astronomers using the Atacama Large Millimeter/submillimeter Array (ALMA) telescope have seen vast streams of gas flowing across the gap in the disc. These are the first direct observations of these streams, which are expected to be created by giant planets guzzling gas as they grow, and which are a key stage in the birth of giant planets.

HD 142527
Location of the young star HD 142527 in the constellation of Lupus
(C) ESO
This chart shows the position of the young star HD 142527, in the constellation of Lupus. The star is too faint to be marked on this chart, but is located at the centre of the red circle.

Mid-IR spectra of HD 142527 Inner Disc and Common Dust Types
Mid-IR spectra of HD 142527 Inner Disc and Common Dust Types
(C) ESO
Mid-IR spectrum of the inner region of the protoplanetary disc around the young star HD 142527, as observed with the MIDI instrument at the VLT Interferometer (upper). Below it are shown laboratory spectra of two crystalline minerals as well as of an Interplanetary Dust Particle (IDP; captured in the Earth's upper atmosphere) with hydrated silicates and, at the bottom, a typical telescopic spectrum of dust grains in the interstellar space. The spectral "signatures" of crystalline pyroxene and olivine, i.e. peaks at wavelength 9.2 and 11.3 µm, respectively, are clearly visible in the spectrum of the inner stellar disc, demonstrating the presence of these species in that region of the disc.

HD 142527 HD 142527
HD 142527
(C) ESO
HD 142527
(C) ESO
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HD 142527 (Star) : Movie

The young star HD 142527 (zoom)
This video starts with a broad panorama of the spectacular central regions of the Milky Way seen in visible light. It then zooms in to the young star HD 142527.

Artist's impression of the disc and gas streams around HD 142527
This artist's impression shows the disc of gas and cosmic dust around the young star HD 142527. Astronomers using the Atacama Large Millimeter/submillimeter Array (ALMA) telescope have seen vast streams of gas flowing across the gap in the disc. These are the first direct observations of these streams, which are expected to be created by giant planets guzzling gas as they grow, and which are a key stage in the birth of giant planets.
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