Astronomy / Astrophysics

15 protoplanetary disks studied in the ODISEA project with their classification according to the proposed model

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An article published in “The Astrophysical Journal Letters” reports a model that traces the evolution of protoplanetary disks through five stages. A team of researchers from the ODISEA (Ophiuchus DIsc Survey Employing ALMA) project developed this model using both simulations and observations of protoplanetary disks within the Ophiuchus molecular cloud obtained using the ALMA radio telescope. The type of evolution observed confirms the division into stages proposed in 2020 in an article published in the journal “Monthly Notices of the Royal Astronomical Society” and offers some confirmation of the mechanisms by which giant planets influence the dynamics within those disks.

Planetary Nebula NGC 1514 (MIRI image, annotated)

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An image captured by the James Webb Space Telescope depicts NGC 1514, a planetary nebula with a dying star at its center. The MIRI (Mid-Infrared Instrument) captured details never seen before, especially of the rings visible only in infrared. The dying star has a companion, although in the images, it seems that thre’s a single bright star at the center of the nebula. This show will continue for many more millennia before the materials disperse into interstellar space. In the meantime, the dying star already only has a compact core left in the form of a white dwarf.

The area around the Acheron Fossae region on Mars

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ESA has released images of the Acheron Fossae region on Mars captured by its Mars Express space probe’s High Resolution Stereo Camera (HRSC). The peculiarity of these images is that they show the two faces of Mars, meaning that they show how the red planet is basically divided into two parts with very different geological characteristics. About half of Mars is composed of an ancient terrain marked by craters and other signs of age and activity, while the other half is much smoother, with a surface probably reshaped by lava from volcanoes that are no longer active.

The galaxy JADES-GS-z13-1 (the red circle in the center) as seen by the James Webb Space Telescope (Image ESA/Webb, NASA, STScI, CSA, JADES Collaboration, Brant Robertson (UC Santa Cruz), Ben Johnson (CfA), Sandro Tacchella (Cambridge), Phill Cargile (CfA), J. Witstok, P. Jakobsen, A. Pagan (STScI), M. Zamani (ESA/Webb))

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An article published in the journal “Nature” reports the results of observations of the primordial galaxy cataloged as JADES-GS-z13-1. A team of researchers used the James Webb Space Telescope to examine this galaxy, estimating that it dates back to about 330 million years after the Big Bang. The surprise came from spectroscopic analyses with so-called Lyman-alpha radiation, emitted in the ultraviolet by hydrogen in specific circumstances, because it was much stronger than would be expected from a galaxy of that era.

Herbig-Haro 49/50 (NIRCam and MIRI Image, annotated)

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An image captured by the James Webb Space Telescope shows Herbig-Haro 49/50, or simply HH 49/50, a type of nebula associated with star formation. The Near-Infrared Camera (NIRCam) and Mid-Infrared Instrument (MIRI) instruments were used in combination to observe infrared details of the outflows whose shape led to the object being nicknamed the Cosmic Tornado. For years, astronomers have wondered what the object they could barely see in images obtained with other instruments at the “tip of the tornado” was, and Webb helped them realize that it’s a spiral galaxy that is far more distant.