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PreprintCC BY 4.0arXiv

KKR 18: A Late Arrival Galaxy?

  • R. Brent Tully
  • Valentina E. Karachentseva
  • Igor D. Karachentsev
  • Gagandeep S. Anand
  • Maksim I. Chazov
  • Serafim S. Kaisan
  • Ehsan Kourkchi
  • Lidia N. Makarova
  • Simon A. Pustilnik
  • Edward J Shaya
  • Arina L. Tepliakova
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Abstract

KKR 18 is a dwarf irregular galaxy in the Local Void at a distance of 9.46 Mpc. It is gas rich and was experiencing vigorous star formation 20 - 100 Myr ago. Its metallicity is 4% of Solar from an emission spectrum, qualifying is as extremely metal poor (XMP). Its most remarkable characteristic is an extremely deficient Red Giant Branch. This feature is shared with a small number of other dwarf galaxies and it is inferred that they lack ancient stellar components. It is suggested that these are late arrival galaxies (LAG).

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Cite

BibTeXRIS
BibTeX
@misc{tully2026late,
  title = {{KKR 18: A Late Arrival Galaxy?}},
  author = {R. Brent Tully and Valentina E. Karachentseva and Igor D. Karachentsev and Gagandeep S. Anand and Maksim I. Chazov and Serafim S. Kaisan and Ehsan Kourkchi and Lidia N. Makarova and Simon A. Pustilnik and Edward J Shaya and Arina L. Tepliakova},
  howpublished = {arXiv},
  year = {2026},
  month = sep,
  doi = {10.48550/arxiv.2609.04437},
  eprint = {2609.04437},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2609.04437},
  note = {CC BY 4.0},
}
RIS
TY  - UNPB
TI  - KKR 18: A Late Arrival Galaxy?
AU  - R. Brent Tully
AU  - Valentina E. Karachentseva
AU  - Igor D. Karachentsev
AU  - Gagandeep S. Anand
AU  - Maksim I. Chazov
AU  - Serafim S. Kaisan
AU  - Ehsan Kourkchi
AU  - Lidia N. Makarova
AU  - Simon A. Pustilnik
AU  - Edward J Shaya
AU  - Arina L. Tepliakova
PY  - 2026
DA  - 2026/09/03
PB  - arXiv
DO  - 10.48550/arxiv.2609.04437
UR  - https://arxiv.org/abs/2609.04437
AB  - KKR 18 is a dwarf irregular galaxy in the Local Void at a distance of 9.46 Mpc. It is gas rich and was experiencing vigorous star formation 20 - 100 Myr ago. Its metallicity is 4% of Solar from an emission spectrum, qualifying is as extremely metal poor (XMP). Its most remarkable characteristic is an extremely deficient Red Giant Branch. This feature is shared with a small number of other dwarf galaxies and it is inferred that they lack ancient stellar components. It is suggested that these are late arrival galaxies (LAG).
ER  -