Observations will shed more light on the atmosphere of the white dwarf GD424

Astronomers have made spectroscopic observations of a newly discovered white dwarf star called GD424. The results of the observation campaign give more insight into the environment of this object budget. The study was conducted on 23 December, ARXIV.ORG. Was presented in a paper published on.

White dwarfs are left with compact cores of low mass stars that have exhausted their nuclear fuel. Although their atmosphere is composed primarily of hydrogen or helium, 25 to 50 percent of all known white dwarfs show traces of metals in their spectra. It is believed that these metals are produced in the excitation of excitedly interplanetary planetary objects. Spectroscopic observations of metal-contaminated white dwarfs may be an essential tool for measuring the bulk formations of the parent body.

Therefore, a team of astronomers led by Paula Izquerodo of the University of La Laguna, Spain, made spectroscopic observations of GD424 – a metal-polluted, helium-atmosphere white dwarf spectral type DB, containing large amounts of trace hydrogen. For this purpose, they provided the Intermediate Spray Spectrograph and Imaging System (IMS) on the mediate.૨-m William Herschel Telescope (WHT) and the 10-Cake Eye Telescope’s High-Resolution Ashell Spectrometer (HIRES).

Scientists have written in the paper that, 424 presented the discovery and analysis of chemical abundance, one of the largest amounts of trace hydrogen ever measured among metal-polluted DBA white dwarf-like white dwarfs.

The researchers used a hybrid method to fit the data of the WH optical spectrum obtained from synthetic spectra, survey photometry and ESA’s Gaia DR2 parallax, which enabled them to determine the phosphoric dimensions of GD424. It was found that the white dwarf has an effective temperature. A mass of about 1, 5 of 0 K, about 0.01 solar masses, a radius of about 0.0109 solar radii, and a cooling age of about 215 million years.

Analyzing the spectra of WHT and cake, the team identified 11 metals in the GD424 atmosphere, namely oxygen, sodium, manganese, chromium, nickel, silicon, iron, magnesium, titanium, calcium and aluminum. Astronomers have speculated that the presence of these elements is due to the accumulation of planetary bodies on the white dwarf.

They added that the GD424 mostly produces dry, rocky debris in growing or stagnant conditions. Photometric results allow researchers to estimate the composition of the parent body.

“The approximate composition of the parent body is consistent with both CI condensates and bulk earth. (…) No oxygen oxygen excess was revealed in the composition of the parent body. The authors concluded.

Further observations of GD424, focused on measuring the abundance of volatile elements, are necessary to gain a better understanding of the nature of the parent material.

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