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Astronomers Find Enormous Relic Of Disrupted Tadpole Galaxy | Astronomy

The interrupted "tadpole" galaxy has an elliptical head and a long straight tail and is about one million light years…

The interrupted “tadpole” galaxy has an elliptical head and a long straight tail and is about one million light years long – about 10 times greater than our own Melkweg galaxy, according to the Astronomer of Tel Aviv University Dr. Noah Brosch and Coauthor.

This image shows the HCG 98 group. The core of the HCG 98 consists of the two “spots” in the center of the image. Everyone is a galaxy like our own Milky Way Galaxy. Tadpole structure covers the central galaxy pair and formed when the pair tore a much smaller galaxy. Image Credits: Brooch et al doi: 10.1093 / mnras / sty2717.

The newly found galaxy is part of the Hickson Compact Group 98 (HCG 98), a small group of galaxies, which is approximately 300 million light years from Earth.

“In compact group environments, we believe we can study” clean “examples of galaxy-galaxy interactions, learn how materials are transferred between members, and how newly adapted materials can modify and affect gala growth and development,” said Dr. Brooch.

Dr. Brooch and colleagues observed the HCG 98 group with a 28-inch (71 cm) telescope at the Wise Observatory and confirmed with further observations with a similar 28-inch at the Polaris Observatory.

They also used archive images of the Sloan Digital Sky Survey from the IAC Stripe 82 Legacy Project.

“Extragalactic Tadpole contains a system with two very close” normal “galaxies, each about 40,000 light years over,” says Brosch.

“Together with other nearby galaxies, the galaxies make up a compact group.”

“What makes this object unusual is that the tail alone is almost 500,000 light years long,” added team leader Professor Michael Rich, an astronomer at the University of California, Los Angeles

“If it was at the distance from Andromeda Galaxen, which is about 2.5 million light years from the earth, it would reach fifth of the road to our own Winter Street.”

The giant “tadpole” was produced by the disturbance of a small, previously invisible dwarf galax that contains mostly stars, found the astronomers.

“When the gravitational strength of two visible galaxies went to stars in this vulnerable galaxy, the stars formed closer to the pair” head “of the pole

” Stars lingering in the sacrificial galaxy formed the tail. “[19659005] The discovery is reported in Monthly Announcements from the Royal Astronomical Society .] _____

Noah Brosch et al. . 2019. Hickson Compact Group 98: A Complex Merger Group with a giant tidal vane and a humongous envelope. MNRAS 482 (2): 2284-2293; doi: 10,1093 / mnras / sty2717

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