2025ApJ...980L..16K

Query : 2025ApJ...980L..16K

2025ApJ...980L..16K - Astrophys. J., 980, L16 (2025/February-2)

Discovery of Metal-poor and Distant Pre-Main Sequence Candidates in WLM with JWST.

KALARI V.M., SALINAS R., ANDERSEN M., DE MARCHI G., RUBIO M., VINK J.S. and ZINNECKER H.

Abstract (from CDS):

We present the discovery of 12 metal-poor and ​​​distant pre-main sequence (PMS) candidates in the dwarf irregular galaxy Wolf-Lundmark-Melotte ∼968 kpc away, at a present-day metallicity of [Fe/H] ∼ -0.9. These candidates have masses between 1.25 and 5 M⊙, with ages <10 Myr, and exhibit significant near-infrared excesses at 2.5 and 4.3 μm. They are concentrated within a cluster roughly 10 pc (2″) across, situated in the H II region [HM95]-9. These are the most distant and metal-poor PMS stars known, and they can offer new quantitative insights into star formation at low metallicities.

Abstract Copyright: © 2025. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Star formation - Pre-main sequence - Dwarf irregular galaxies

Status at CDS : Examining the need for a new acronym. // All or part of tables of objects will be ingested in SIMBAD with priority 1.

Simbad objects: 7

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Number of rows : 7
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 [HM95] WLM 9 HII 00 01 56.5 -15 26 52           ~ 11 0
2 MCG-03-01-015 G 00 01 57.9 -15 27 50   11.50 11.10 10.93   ~ 782 2
3 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 12317 1
4 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 7988 0
5 NAME Magellanic Bridge HI 03 11 -77.5           ~ 522 1
6 LBN 211.65-01.51 HII 06 45 28 +00 17.8           ~ 75 0
7 NAME Local Group GrG ~ ~           ~ 9325 0

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