Y0V Standards: Cushing11: WISEP J1738+2732: "Y0 spectral standard" (near-IR) Kirkpatrick11: WISE 1738+2732: "Y0 standard" Cushing11 first assigned WISEP J1738+2732 as Y0 standard and classified 3 other objects as Y0 or variant (WISEP J0410+1502(Y0), WISEPC J1405+5534(Y0(pec?)), WISEP J1541-2250(Y0), WISEPC J2056+1459). Leggett17: "We estimate that the known Y dwarfs are 3 to 20 Jupiter-mass objects with ages of 0.6-8.5 Gyr." Leggett17 presents tables of Y dwarf photometry and properties. The reader is referred to Kirkpatrick19 and Kirkpatrick20 for mean properties of Y dwarfs (e.g. Teff, M_H, M_W2, H-W2, IRAC(ch1-ch2), etc.). Teff(Y0V) = 320 K (310+35-40K - 330+-45K); WISEJ0146+4234B (1-10Gyr) Teff(Y0V) = 350 K ; WISEP J1738+2732 (Cushing11) pri. stan. Teff(Y0V) = 360 K ; WISE_2209+2711 (Kirkpatrick19; plx=161.6+-2.4mas) Teff(Y0V) = 400 K ; Leggett15 Teff(Y0V) = 400 K ; Schneider15/WISE0359-5401 Teff(Y0V) = 400 K ; Schneider15/WISE0410+1502 Teff(Y0V) = 400 K ; Schneider15/WISE1639-6847 Teff(Y0V) = 400 K ; Schneider15/WISE1738+2732/ pri. stan. Teff(Y0V) = 403 K ; WISE_1639-6847 (Kirkpatrick19; plx=211.9+-2.7mas) Teff(Y0V) = 425 K [400-450K] ; Schneider15/WISE1206+8401 Teff(Y0V) = 425 K [400-450K] ; Schneider15/WISE2056+1459 Teff(Y0V) = 425 K [400-450K] ; Schneider15/WISE2220-3628 Teff(Y0V) = 425 K [410-440K] ; Dupuy13 (1-5Gyr) Teff(Y0V) = 425+-25 K ; Leggett16/W1738 pri. stan. Teff(Y0V) = 435 K ; WISE_1738+2732 (Kirkpatrick19; plx=131.0+-2.4mas) Teff(Y0V) = 445 K ; WISE_0359-5401 (Kirkpatrick19; plx=75.8+-2.5mas) Teff(Y0V) = 450 K ; Schneider15/WISE0734-7157 Teff(Y0V) = 451 K ; WISEPA J041022.71+150248.5 (Kirkpatrick20) Teff(Y0V) = 454 K ; WISE_0410+1502 (Kirkpatrick19; plx=150.2+-2.4mas) Teff(Y0V) = 458 K ; WISE_0304-2705 (Kirkpatrick19; plx=81.5+-7.7mas) Teff(Y0V) = 458 K ; WISE_2220-3628 (Kirkpatrick19; plx=97.0+-2.4mas) Teff(Y0V) = 459 K ; WISE_1206+8401 (Kirkpatrick19; plx=81.9+-2.5mas) Teff(Y0V) = 460 K ; WISEA J114156.67−332635.5 (Kirkpatrick20) Teff(Y0V) = 460 K ; Kirkpatrick20 (Table 13 polynomial) Teff(Y0V) = 461 K ; WISE_0146+4234B (Kirkpatrick19; plx=52.5+-2.3mas) Teff(Y0V) = 461 K ; WISE_1217+1626B (Kirkpatrick19; plx=104.4+-4.7mas) Teff(Y0V) = 463 K ; WISE_1141-3326 (Kirkpatrick19; plx=99.7+-4.2mas) Teff(Y0V) = 464 K ; WISE J071322.55−291751.9 (Kirkpatrick20) Teff(Y0V) = 464 K ; WISE_0336-0143 (Kirkpatrick19; plx=99.0+-2.4mas) Teff(Y0V) = 466 K ; WISE_0734-7157 (Kirkpatrick19; plx=75.0+-2.4mas) Teff(Y0V) = 466 K ; WISE_0713-2917 (Kirkpatrick19; plx=107.5+-2.4mas) Teff(Y0V) = 467 K ; WISE_2056+1459 (Kirkpatrick19; plx=138.3+-2.2mas) Teff(Y0V) = 471 K ; WISE_0302-5817 (Kirkpatrick19; plx=56.1+-4.4mas) Teff(Y0V) = 525 K [500-550K] ; Schneider15/WISE2209+2711 => adopt Teff(Y0V) = 450 K (logT = 2.653) [updated 2/2/2021] M_J(Y0V) > 19.00 ; WISE_0336-0143 20.0 calc using Kirkpatrick20 (plx=99.8mas) M_J(Y0V) > 19.25 ; WISE_2056+1459 20.0 calc using Kirkpatrick20 (plx=140.8mas) M_J(Y0V) = 20.24 ; WISE_0713-2917 20.0 calc using Kirkpatrick20 (plx=109.3mas) M_J(Y0V) > 22.71 ; WISE_1639-6847 20.0 calc using Kirkpatrick20 (plx=219.6mas) M_J(MKO)(Y0V) > 18.48 ; CWISE_0634+5049 20.0 calc using Kirkpatrick20 (plx=62.0mas) M_J(MKO)(Y0V) > 19.21 ; CWISE_1047+5457 20.0 calc using Kirkpatrick20 (plx=75.2mas) M_J(MKO)(Y0V) = 19.26 ; WISE_0146+4234 20.0 calc using Kirkpatrick20 (plx=51.7mas) M_J(MKO)(Y0V) > 19.34 ; CWISE_2011-4812 20.0 calc using Kirkpatrick20 (plx=71.0mas) M_J(MKO)(Y0V) = 19.44 ; WISE_0336-0143 20.0 calc using Kirkpatrick20 (plx=99.8mas) M_J(MKO)(Y0V) = 19.71 ; WISE_0734-7157 20.0 calc using Kirkpatrick20 (plx=74.5mas) M_J(MKO)(Y0V) = 19.85 ; WISE_1141-3326 20.0 calc using Kirkpatrick20 (plx=104.0mas) M_J(MKO)(Y0V) > 19.85 ; WISE_1936+0408 20.0 calc using Kirkpatrick20 (plx=113.9mas) M_J(MKO)(Y0V) = 19.87 ; WISE_2056+1459 20.0 calc using Kirkpatrick20 (plx=140.8mas) M_J(MKO)(Y0V) = 20.11 ; WISE_1206+8401 20.0 calc using Kirkpatrick20 (plx=84.7mas) M_J(MKO)(Y0V) = 20.11 ; WISE_0304-2705 20.0 calc using Kirkpatrick20 (plx=73.1mas) M_J(MKO)(Y0V) = 20.13 ; WISE_1738+2732 20.0 calc using Kirkpatrick20 (plx=130.9mas) M_J(MKO)(Y0V) = 20.17 ; WISE_0713-2917 20.0 calc using Kirkpatrick20 (plx=109.3mas) M_J(MKO)(Y0V) = 20.19 ; CWISE_0938+0634 20.0 calc using Kirkpatrick20 (plx=67.9mas) M_J(MKO)(Y0V) = 20.23 ; WISE_0410+1502 20.0 calc using Kirkpatrick20 (plx=151.3mas) M_J(MKO)(Y0V) = 20.32 ; Tinney14 (N=11) M_J(MKO)(Y0V) = 20.35 ; WISE_2220-3628 20.0 calc using Kirkpatrick20 (plx=95.5mas) M_J(MKO)(Y0V) = 20.90 ; WISE_0359-5401 20.0 calc using Kirkpatrick20 (plx=73.6mas) M_J(MKO)(Y0V) = 22.34 ; WISE_1639-6847 20.0 calc using Kirkpatrick20 (plx=219.6mas) M_J(MKO)(Y0V) = 23.90 ; WISE_2209+2711 20.0 calc using Kirkpatrick20 (plx=161.7mas) => adopt M_J(MKO)(Y0V) = 20.2 [updated 2/2/2021] (J(MKO)-J)(Y0V) = -0.07 +- 0.23 ; WISE__0713-2917 M_K(MKO)(Y0V) < 17.95 ; CWISE_0938+0634 calc using Kirkpatrick20 (upper limit) M_K(MKO)(Y0V) = 20.32 ; WISE_0734-7157 calc using Kirkpatrick20 M_K(MKO)(T9.5V) = 20.5 ; T9.5V adopted M_K(MKO)(Y0V) = 20.75 ; WISE_2056+1459 calc using Kirkpatrick20 M_K(MKO)(Y0V) = 20.81 ; WISE_0410+1502 calc using Kirkpatrick20 M_K(MKO)(Y0V) = 21.23 ; WISE_2220-3628 calc using Kirkpatrick20 M_K(MKO)(Y0V) = 21.49 ; WISE_0713-2917 calc using Kirkpatrick20 M_K(MKO)(Y0V) = 22.13 ; WISE_0359-5401 calc using Kirkpatrick20 => adopt M_K(MKO)(Y0V) = 21.0 [updated 12/4/2020] M_Ks(Y0V) > 16.19 ; CWISE_1359-4352 20.0 calc using Kirkpatrick20 (plx=45.3mas) upper limit M_Ks(Y0V) > 17.72 ; CWISE_2011-4812 20.0 calc using Kirkpatrick20 (plx=71.0mas) upper limit M_Ks(Y0V) > 17.76 ; WISE_0713-2917 20.0 calc using Kirkpatrick20 (plx=109.3mas) upper limit W1-W2(Y0V) = 3.64 ; Kirkpatrick19 polynomial M_W2(Y0V) = 14.65 (+-0.35 rms) ; Tinney14 (N=11) BC_YJH(Y0) = 0.8+-0.6 ; Dupuy15 Mbol(Y0) = 21.06+-0.25 mag ; Dupuy15 logL(Y0) = -6.52 ; Dupuy13 mean logL(Y0) = -6.53+-0.10 ; Dupuy15 (Mbol=21.06+-0.25 => IAU 2015 Mbol) logl(Y0) = -7.01+-0.22 ; Dupuy15 WISE J014656.66+423410.0 B => adopt logL(Y0V) = -6.52 => adopt Mbol(Y0V) = 21.04 (from logL=-6.52) Mass(Y0) = 8-18 Mjup ; Dupuy13 1-5 Gyr # Primary Standard WISEP J1738+2732 = WISE J173835.53+273259.0 = WISEA J173835.52+273258.8 = WISEP J173835.52+273258.9 *Y0: Cushing11(stan),Kirkpatrick11(stan),Schneider15(stan) Cushing11 adopts as the Y0 standard object, and adopted by Kirkpatrick11. Leggett16: "W1738 may be metal-rich". W1-W2=3.620+-0.366(Cushing11). Teffs: 350(350-400)K(Cushing11), 425+-25K(Leggett16). logg=4.0+-0.25(Leggett16). Mass: M=20(12-30)Mjup(Cushing11), 3-9Mjup(Leggett16). Age: 0.3-3 Gyr(Leggett16). # Examples WISEPA J041022.71+150248.5 Y0: Cushing11,Kirkpatrick20 plx=151.3+-2.0mas(Kirkpatrick20), plx=144.3+-9.9mas(Smart17). Teff=451+-88K(Kirkpatrick20). WISE J071322.55−291751.9 Y0: Kirkpatrick20 plx=109.3+-2.1mas(Kirkpatrick20). Teff=464+-88K(Kirkpatrick20). WISEA J114156.67−332635.5 Y0: Kirkpatrick20 plx=104.0+-2.9mas(Kirkpatrick20). Teff=460+-79K(Kirkpatrick20). WISEPC J121756.91+162640.2B Y0: Kirkpatrick20 plx=107.4+-3.5mas(Kirkpatrick20). Teff=460+-79K(Kirkpatrick20) WISEPC J1405+5534 Y0(pec?): Cushing11 WISEP J1541-2250 Y0: Cushing11 WISE J163940.83-684738.6 Y0pec: plx = 211.11+-0.56mas(Fontanive21) => D=4.737+-0.013pc. WISEPC J2056+1459 Y0: Cushing11 # Other Y0 Objects Y0V objects: WISE J014656.66+423410.0 B Y0 ; Cushing11(AB),Kirkpatrick12(AB),Dupuy15(B) WISE J035934.06−540154.6 Y0 ; Cushing11,Kirkpatrick12 WISE J041022.71+150248.4 Y0 ; Cushing11,Kirkpatrick12,Kirkpatrick20 WISE J071322.55-291751.9 Y0 ; Cushing11,Kirkpatrick12 WISE J073444.02-715744.0 Y0 ; Cushing11,Kirkpatrick12 WISE J154151.65−225024.9 Y0 ; Kirkpatrick12(Y0,Cushing11) WISE J120604.38+840110.6 Y0 ; Schneider15 WISEPC J140518.40+553421.5 Y0(pec?) ; Cushing11,Kirkpatrick12 WISE J1541-2250 Y0 ; Cushing11 WISEPA J173835.53+273258.9 Y0 ; Cushing11,Kirkpatrick12 WISE J205628.91+145953.2 Y0 ; Cushing11,Kirkpatrick12 WISE J222055.31-362817.4 Y0 ; Kirkpatrick12