Optical constraints on the coldest metal-poor population

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Volume 698 (May 2025)

A&A, 698 (2025) A141

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Table A.1.

List of metal-poor T and Y dwarf candidates in our work separated by astrometric and photometric samples.

For astrometry:

Full name	α, δ (deg)	MJD	μ_{α cos δ, δ} (mas/yr)	Sp.T.	Parallax (mas)

⁽¹⁾WISEA J000430.66−260402.3	⁽¹²⁾1.127859, −26.067652	⁽¹²⁾57234.57	⁽¹²⁾+1±4, −244±4	sdT2.0,⁽¹²⁾T4.0	⁽¹²⁾33.1±4.7
⁽¹⁾WISEA J030119.39−231921.1	⁽¹²⁾45.331221, −23.322665	⁽¹²⁾57262.58	⁽¹²⁾+234±3, −119±4	sdT1.0	⁽¹²⁾37.3±3.8
⁽²⁾WISEA J042236.95−044203.5	65.656712, −4.702669	58467.54	+1150±53, −695±55	T8.0±1.0
⁽²⁾WISEA J155349.96+693355.2	238.445876, +69.567907	58358.98	−1684±56, +1348±53	⁽²⁾T5.0±1.0, ⁽³⁾sdT4.0
⁽³⁾CWISE J221706.28−145437.6	⁽¹³⁾334.278402, −14.912140	⁽¹³⁾59826.03	⁽¹³⁾+1257±44, −986±44	esdT5.5±1.2


For photometry:

Full name	α, δ (deg)	MJD	μ_α cos δ, μ_δ (mas/yr)	Sp.T.	Parallax (mas)	Notes

⁽⁴⁾CWISEP J015613.24+325526.6	29.0568626, +32.9235107	58419.89	+1138±84, −373±84	sdT
⁽⁵⁾CWISE J021948.68+351845.3	⁽¹⁴⁾34.9528878, +35.3125796	⁽¹⁴⁾57095.63	+673.2±46.4, −504.4±57.0	T9.5±1.5	⁽¹⁵⁾57.33±0.04	Ross 19B
⁽⁴⁾CWISEP J050521.29−591311.7	76.3403687, −59.2215888	58448.04	+461±36, −1003±35	T6.5
⁽⁶⁾CWISE J052306.42−015355.4	⁽¹⁴⁾80.7767575, −1.8987457	⁽¹⁴⁾57392.63	⁽¹⁴⁾+511.6±53.6, −39.9±55.9	esdT0.0±1.0
⁽⁷⁾WISEA J071121.36−573634.2	⁽¹⁴⁾107.8390823, −57.6092955	⁽¹⁴⁾56557.08	+18±10, +990±90	sdT0±1
⁽³⁾CWISE J073844.52−664334.6	⁽¹⁴⁾114.6855096, −66.7262825	⁽¹⁴⁾57258.48	⁽¹⁴⁾+768.4±32.0, −445.1±29.8	esdT5.5±1.2
⁽⁴⁾CWISEP J090536.35+740009.1	136.4033148, +74.0008111	58494.02	+465±67, −1490±71	T6.0
⁽¹⁾WISEA J101944.62−391151.6	⁽¹⁴⁾154.9352802, −39.1974770	⁽¹⁴⁾57156.08	−472.2±28.0, +222.7±26.4	sdT3.0
⁽⁸⁾WISEA J153429.75−104303.3	233.621873, −10.721775	57645.36	−1253.1±8.9, −2377.0±7.0	esdY?	38.5±8.4	The Accident
⁽⁹⁾WISEA J200520.35+542433.6	⁽¹⁶⁾301.333016, +54.408501	⁽¹⁶⁾56658.00	⁽¹⁶⁾−1154.4±1.2, −900.4±1.2	T8	⁽¹⁷⁾59.91±0.55	Wolf 1130C
^{(10, 19)}WISE J201404.13+042408.5	⁽¹⁸⁾303.516175, +4.402821	⁽¹⁸⁾57326.30	⁽¹⁸⁾−611.3±1.5, +313.4±1.5	⁽¹⁹⁾T6.5	⁽¹²⁾45.5±2.4
⁽¹¹⁾WISE J210529.08−623558.7	⁽¹⁴⁾316.3716241, −62.5999392	⁽¹⁴⁾55961.60	⁽¹⁴⁾765.0±15.7, −1507.2±15.0	T1.5
⁽²⁾WISEAR J220746.67−503631.7	331.9449276, −50.6122455	58503.19	+108±99, −1380±98	T7.5

Notes. The targets are ordered by right ascension. The coordinates are in degrees under equinox J2000. MJDs are the Modified Julian dates of these coordinates. MJD = JD − 2400000.5. If not specified, all the information is from the same references as those of the targets. In the rest of the paper, we subsequently use Whhmm as abbreviations for these objects.

References. (1): Greco et al. (2019); (2): Meisner et al. (2020a); (3): Meisner et al. (2021); (4): Meisner et al. (2020b); (5): Schneider et al. (2021) (6): Brooks et al. (2022); (7): Kellogg et al. (2018) (8): Kirkpatrick et al. (2021a); (9): Mace et al. (2013a); (10): Kirkpatrick et al. (2012) (11): Luhman & Sheppard (2014) (12): Best et al. (2020); (13): Zhang et al. (2023); (14): CatWISE, Marocco et al. (2021); (15): Parallax of the primary Ross 19A (Schneider et al. 2021); (16): Kirkpatrick et al. (2019); (17): Parallax of the primary Wolf 1130A (Mace et al. 2018); (18): Kirkpatrick et al. (2021b); (19): Mace et al. (2013b).

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