2MASS J16401027+1934456

All names: 2MASS J16401027+1934456, HS 1637+1940, SDSS J164010.31+193445.9, SDSS J164010.33+193446.2, PSO J164010.332+193446.361, Gaia DR2 4563476938972834816

Parameter Unit MWDD H Pan-STARRS DR1 Gaia DR2 Gianninas et al. 2011 Mukadam et al. 2004 SDSS DR12 Simbad
Right ascension 16 40 10.34 (0.05) 16 40 10.32 16 40 10.28
Declination 19 34 46.37 (0.05) 19 34 45.90 19 34 45.70
Spectral type DA DA DA2.6
Effective temperature [K] 11481.0 19620.0 (384) 12000.0
log(g) [cgs] 7.28 7.92 (0.06)
Mass [M☉] 0.29 0.58 (0.03)
log(Luminosity) [L☉]
Cooling age [Gyr] 0.2049
log(H/He)
log(C/He)
log(Ca/He)
log(Ca/H)
log(C/H)
log(N/H)
log(O/H)
log(Na/H)
log(Mg/H)
log(Al/H)
log(Si/H)
log(P/H)
log(S/H)
log(Sc/H)
log(Ti/H)
log(Cr/H)
log(Mn/H)
log(Fe/H)
log(Ni/H)
Parallax [mas] 5.33 (0.08)
Distance [pc] 187.68 (3) 159.00
Composition H H
Proper motion (right ascension) [mas/yr] 26.1414497114 (0.1) 24.0
Proper motion (declination) [mas/yr] 37.9353640043 (0.1) 39.0
Variability NOV NOV
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude
V magnitude
R magnitude
I magnitude
J magnitude 16.79
H magnitude
K magnitude
u magnitude 17.30 (0.009) 17.32
g magnitude 17.03 (0.005) 17.07
r magnitude 17.28 (0.006) 17.30
i magnitude 17.49 (0.007) 17.50
z magnitude 17.71 (0.02) 17.72
G magnitude 17.18
BP magnitude 17.12
RP magnitude 17.21
Pan g magnitude 17.08 (0.004)
Pan r magnitude 17.30 (0.004)
Pan i magnitude 17.52 (0.004)
Pan z magnitude 17.70 (0.01)
Pan y magnitude 17.83 (0.03)

* Constant surface field

Special notes:

Spectra

Controls

Normalize at:

Range:

x: to
y: to

Spectra available:

Spectra without link are available upon request

Absorption lines

Photometric filters

BVRI
ugriz

Photometric fit




The Montreal White Dwarf Database is produced and maintained by Prof. Patrick Dufour at Université de Montréal. Please send database updates, corrections, suggestions or bug reports to dufourpa@astro.umontreal.ca.