2025RNAAS...9..176Z

Query : 2025RNAAS...9..176Z

2025RNAAS...9..176Z - Research Notes of the AAS, 9, 176 (2025/July-0)

Ks-band Photometry of the Extreme T Subdwarf CWISE J221706.28-145437.6.

ZHANG J.J.-Y., LODIEU N. and MARTIN E.L.

Abstract (from CDS):

We present deep Ks-band imaging of the extreme T subdwarf CWISE J221706.28-145437.6. Using the new photometry, we construct its spectral energy distribution and find this object exhibits exceptionally strong collision-induced absorption in the H and K band. The comparison with the nearest benchmark extreme T subdwarf WISEA J181006.18-101000.5 suggests the object would be cooler and more metal-poor than the benchmark.

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

Journal keyword(s): Brown dwarfs - T dwarfs - T subdwarfs - Broad band photometry - Metallicity

Simbad objects: 3

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Number of rows : 3
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 WISE J041451.64-585457.0 BD* 04 14 51.67 -58 54 56.7           esdT6: 10 0
2 WISE J181006.21-101000.3 BD* 18 10 06.18 -10 10 00.5           esdT3: 17 0
3 CWISE J221706.28-145437.6 BD? 22 17 06.28 -14 54 37.6           ~ 6 0

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