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Astronomers survey the planetary nebula NGC 6302 with Hubble.



Astronomers survey the planetary nebula NGC 6302 with Hubble.

Color overlay of NGC 6302̵

7;s WFC3 line aspect ratio image. Credit: Kastner et al., 2021.

Using the Hubble Space Telescope (HST), astronomers conducted near-ultraviolet observations via near-infrared observations of the asteroid nebula (PN), known as NGC 6302, the results of a follow-up campaign, presented today. May at arXiv.org can help us. better understand the nature of this PN

PNe is expanding the shell of gas and dust that is ejected from stars during the evolutionary process from main sequence stars to red giants or white dwarfs. They are quite rare. But it is important for astronomers studying the chemical evolution of stars and galaxies.

Located about 3,400 light-years from the constellation Scorpion, NGC 6302 (also known as Bug Nebula, Butterfly Nebula, or Caldwell 69) is a waist-squeezing two-lobed PN rich in dust and molecular gas. The relative proximity makes it an excellent target for high-resolution imaging aimed at understanding the origin and evolution of bipolar structures in known PNe populations.

Thus, a group of astronomers led by Joel H. Kastner of the Rochester Institute of Technology (RIT) used Hubble’s Wide-angle Camera 3 (WFC3) to obtain a comprehensive and contemporary set of near-range ultraviolet rays. Passing near infrared (243 nm to 1.6 µm) NGC 6302 emission line image

“Here we present the full HST/WFC3 image of NGC 6302 with different line aspect ratios. and a detailed examination of the main outcomes gleaned from these images,” the researchers wrote in the paper.

Hubble photographs show that NGC 6302 has a dusty toroidal equatorial structure that divides the PN pole and finer structures (such as tufts, knots, and filaments) within the lobe. Such morphology is highly unusual for PNe. bipolar, in addition to multipolar PNe

Study identifies 1.64 µm S-shaped unexpected brightness [Fe II] Greenhouse gas emissions in NGC 6302 traced within the southern edge of the eastern lobe. and within the northern edge of the western petal Astronomers speculate that this may be a zone of shock caused by continuous, fast, and colimate winds from the central star of PN.

The research also found that the object previously identified as the central star NGC 6302 was actually a frontal star. The scientists added that the bubble-like feature in the core region of NGC 6302 likely indicates the true position of the central star within the PN dusty central torus. However, further subarcsecond resolution observations are required in the IR midband and submillimeter to confirm this

In their conclusion, the paper’s authors state that the findings highlight the mysterious nature of NGC 6302.

“The characteristics revealed by our panchromatic HST/WFC3 images of NGC 6302, in particular, Clear horizontal structure zones and nested bubble system. and the surprisingly misaligned direction of fast airflow in today’s central engines (tracked at 1.64 µm). [Fe II] emission) and the main axis of symmetry of the nebula. (as defined by the dusty molecule torus The system at the polar axis and outer lobe wall)—presents a particularly daunting challenge for modeling the origin and evolution of bipolar structures in PNe,” the scientists conclude.


Astronomers dissect the anatomy of a planetary nebula using images from the Hubble Space Telescope.


More information:
Panchromatic HST/WFC3 imaging study of the rapidly evolving young planetary nebula I. NGC 6302, arXiv:2105.13953. [astro-ph.SR] arxiv.org/abs/2105.13953

© 2021 Science X Network

reference: Astronomers Survey Planetary Nebula NGC 6302 with Hubble (2021, June 8). Retrieved June 9, 2021 from https://phys.org/news/2021-06-astronomers-probe-planetary-nebula-ngc.html.

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