L7.5V

Kirkpatrick09(GrayCorbally): 2MASS J08251968+2115521 - L7.5 (primary optical standard)

(J-H)(L7.5V)  = 1.151 (+-0.13 rms) ; SIMBAD trend for d<30pc L dwarfs
=> adopt (J-H)(L7.5V) = 1.15 [updated 8/6/2020]

(H-Ks)(L7.5V)= 0.638 (+-0.09 rms); trend SIMBAD d<30pc L dwarfs
=> adopt (H-Ks)(L7.5V) = 0.638 [updated 8/6/2020]

Teff(L7.5V) = 1310 K ; Luhman16A (see below)
Teff(L7.5V) = 1367 K ; Filippazzo15 calibration (M6V-T9V)
Teff(L7.5V) = 1377 K ; Kirkpatrick20 (Table 13 polynomial)
Teff(L7.5V) = 1400 K ; Cifuentes20 <Teff> for CARMENES L7.5V(N=1)
=> adopt Teff(L7.5V) = 1380K (logT = 3.140) [updated 12/26/2020]

M_J(L7.5V) = 14.499 ; EEM fit to L/T dwarfs d<25pc
M_J(L7.5V) = 15.18  ; exemplar Luhman16A

M_K(MKO)(L7.5V)=13.0902 ; Gl_584C   7.5 calc using Kirkpatrick20 (plx=55.98mas)

M_Ks(L7.5V)=  11.7496 ; DENIS_2252-1730 7.5 calc using Kirkpatrick20 (plx=59.1461mas)
M_Ks(L7.5V)=  12.3416 ; WISE_1049-5319 7.5 calc using Kirkpatrick20 (plx=501.557mas)
M_Ks(L7.5V)= 12.64    ; fit to SIMBAD L0-T7.5 dwarfs d<25pc (12/2020)
M_Ks(L7.5V)= 12.64    ; trend to L/T dwarfs in notes (1/2021)
M_Ks(L7.5V)=  12.7796 ; LHS_2397aB  7.5 calc using Kirkpatrick20 (plx=69.4903mas)
M_Ks(L7.5V)=  12.7946 ; SDSS_1520+3546 7.5 calc using Kirkpatrick20 (plx=57.4mas)
M_Ks(L7.5V)=  12.911  ; 2MASS_2325+4251 7.5 calc using Kirkpatrick20 (plx=67.6385mas)
M_Ks(L7.5V)=  12.9466 ; WISE_1800+0134 7.5 calc using Kirkpatrick20 (plx=127.4450mas)
M_Ks(L7.5V)=  12.96   ; exemplar Luhman 16A 
M_Ks(L7.5V)=  13.0902 ; Gl_584C   7.5 calc using Kirkpatrick20 (plx=55.98mas)
=> adopt M_Ks(L7.5V) = 12.64 [adopted 12/30/2020]

logL(L7.5V) = -4.67 ; Luhman 16A (Faherty14)

# Exemplar 

Luhman 16A = WISE J104915.57−531906.1A
   L6/7.5: Lodieu15
  *L7.5: Burgasser13(L7.5+-0.9,Faherty14 cites L7.5+-0.5),Kirkpatrick20(near-IR)
   L8: Luhman13(L8+-1),Kniazev13(L8+-1),Kirkpatrick20(opt.)
   L8.8: Luhman14

   Famous nearby L/T binary at 2pc discovered by
   Luhman13(2013ApJ...767L...1L), and a flux-reversal binary which
   switches which component is brighter between J and K band.
   Remarkably, Lodieu15 finds that A & B have essentially identical
   luminoisities and statistically similar Teffs, despite the 2+
   subtype differences. Faherty14 estimates B to be only ~30K cooler (1310+-30K for A,
   1280+-75K for B). 
   logL=-4.66+-0.08(Lodieu15).  
   G=16.9317+-0.0053(GaiaDR2), 
   J_MKO=11.53+-0.04(Burgasser13),
   J=11.68+-0.05(Burgasser15,2MASS sys.),
   H_MKO=10.37+-0.04(Burgasser13),
   H=10.31+-0.05(Burgasser15,2MASS sys.),
   K_MKO=9.44+-0.07(Burgasser13),
   Ks=9.46+-0.08(Burgasser15,2MASS sys.)
   plx=500.51+-0.11mas(Sahlmann15) =>
   M_J = 15.177+-0.050, 
   M_Ks = 12.957+-0.080.
   Teff=1305_180-135K(Lodieu15), 1310+-30K(Faherty14), 1334+-58K(Kirkpatrick20) =>
   <Teff> = 1310K. 
   
# Examples