# Eftekhari 2025: The Massive and Quiescent Elliptical Host Galaxy of the Repeating Fast Radio Burst FRB 20240209A

> T. Eftekhari, Y. Dong, W. Fong et al., 2025. 8 records on Mysteries Department cite it. A second old-population host.

Source: https://mysteriesdept.com/sources/SRC0CVCM51R7G8W/the-massive-and-quiescent-elliptical-host-galaxy-of-the  
Publisher: Mysteries Department  
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[Sources](https://mysteriesdept.com/sources)[Fast radio bursts and the origin of the one-off bursts](https://mysteriesdept.com/mysteries/fast-radio-bursts)Eftekhari 2025

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# The Massive and Quiescent Elliptical Host Galaxy of the Repeating Fast Radio Burst FRB 20240209A

T. Eftekhari, Y. Dong, W. Fong et al., 2025. _The Astrophysical Journal Letters 979(2), L22_.

The first repeater localised with the CHIME/FRB Outriggers lies in a massive, quiescent elliptical galaxy at z = 0.1384, about 11 billion years old in its stars. With FRB 20200120E, this points to a channel distinct from the core collapse of massive stars.

**Fast radio bursts and the origin of the one-off bursts** Articledoi: **[10.3847/2041-8213/ad9de2](https://doi.org/10.3847/2041-8213/ad9de2)** Checked against the original0

## What it's used for here

A second old-population host.

## Cited by on this site 8 records

[Accreting compact binaries, such as luminous X-ray binaries, rather than isolated magnetars.](https://mysteriesdept.com/mysteries/fast-radio-bursts/answers/ANS0CVCMFHP7PRT/accreting-compact-binaries-such-as-luminous-x-ray-binaries)

Answer

ANS

[Luminous X-ray binaries.](https://mysteriesdept.com/mysteries/fast-radio-bursts/answers/ANS0CVCMND603XR/luminous-x-ray-binaries)

Answer

ANS

[Both of these old-population sources are repeaters, so their bearing on one-off bursts is indirect.](https://mysteriesdept.com/mysteries/fast-radio-bursts/evidence/EVD0CVCMEJE5CDD/both-of-these-old-population-sources-are-repeaters-so-their)

Evidence

EVD

[FRB 20240209A has a large offset and a host like those of short gamma-ray bursts.](https://mysteriesdept.com/mysteries/fast-radio-bursts/evidence/EVD0CVCMN5C4QQG/frb-20240209a-has-a-large-offset-and-a-host-like-those-of)

Evidence

EVD

[FRB 20240209A lies in a quiescent elliptical galaxy with a stellar age of about 11 billion years.](https://mysteriesdept.com/mysteries/fast-radio-bursts/evidence/EVD0CVCMEAM4BC5/frb-20240209a-lies-in-a-quiescent-elliptical-galaxy-with-a)

Evidence

EVD

[Fast radio bursts and the origin of the one-off bursts](https://mysteriesdept.com/mysteries/fast-radio-bursts)

The mystery article

MYS

[How do burst sources come to be in old star clusters and dead galaxies?](https://mysteriesdept.com/mysteries/fast-radio-bursts/questions/QST0CVCMC4A44GR/how-do-burst-sources-come-to-be-in-old-star-clusters-and)

Question

QST

[What produces most of the one-off fast radio bursts?](https://mysteriesdept.com/mysteries/fast-radio-bursts/questions/QST0CVCMB5213XT/what-produces-most-of-the-one-off-fast-radio-bursts)

Question

QST

## Cite it

```
Eftekhari, T., Dong, Y., Fong, W., Shah, V., & et al. (2025). The Massive and Quiescent Elliptical Host Galaxy of the Repeating Fast Radio Burst FRB 20240209A. The Astrophysical Journal Letters 979(2), L22. https://doi.org/10.3847/2041-8213/ad9de2
```

[Read it free at doi.org](https://doi.org/10.3847/2041-8213/ad9de2)

Key

**SRC** 0CVCM51R7G8W

Kind

Journal article

Rights

CC-BY-4.0

Kept

27 Oct 2026

Checked

Against the published article

Added by

[apollo](https://mysteriesdept.com/u/apollo)

The record

Bibliographic records are CC0. Take this one as CSL-JSON, BibTeX or RIS.

[CSL-JSON](https://mysteriesdept.com/sources/SRC0CVCM51R7G8W/the-massive-and-quiescent-elliptical-host-galaxy-of-the/csl.json)