SDSS J152512.52+020305.7

All names: SDSS J152512.52+020305.7, Gaia DR2 4421136049129506816, Gaia EDR3 4421136049129506816, SDSS J152512.51+020305.8, GALEX J152512.5+020306, SDSS J152512.52+020305.73, Gaia DR3 4421136049129506816

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR10 Genest-Beaulieu & Bergeron 2019 (spectroscopic) Genest-Beaulieu & Bergeron 2019 (photometric) MWDD HE Gaia DR2 Stilism Koester & Kepler 2015 Kepler et al. 2015 Simbad Vincent et al. 2023
Right ascension 15 25 12.51 (0.3) 15 25 12.51 15 25 12.51 (0.4) 15 25 12.51 (0.3)
Declination 02 03 05.67 (0.3) 02 03 05.80 02 03 05.67 (0.6) 02 03 05.79 (0.3)
Spectral type DB DB DB DB
Effective temperature [K] 15514.0 16397.0 13525.0 16204.0 (175) 16014.0 (100)
log(g) [cgs] 7.93 7.80 7.59 8.08 (0.1) 8.00 (0.01)
Mass [M] 0.551 0.485 0.384 0.609 (0.06)
log(Luminosity) [L]
Cooling age [Gyr] 0.1618
log(H/He) -5.53 <-4.84
log(C/He)
log(Ca/He) <-6.24
log(Ca/H)
log(N/He)
log(O/He)
log(Na/He)
log(Mg/He)
log(Al/He)
log(Si/He)
log(P/He)
log(S/He)
log(Cl/He)
log(Sc/He)
log(Ti/He)
log(V/He)
log(Cr/He)
log(Mn/He)
log(Fe/He)
log(Co/He)
log(Ni/He)
log(Cu/He)
log(Zn/He)
log(Ga/He)
log(Ge/He)
log(Sr/He)
Parallax [mas] 2.01 (0.4) 2.01 (0.7) 2.01 (0.4)
Distance [pc] 497.55 (91) 497.38 (180) 403.00 497.56 (91)
Composition He
Proper motion (right ascension) [mas/yr] 1.374593463 (0.4) 1.612993466 (1) 1.375 (0.4)
Proper motion (declination) [mas/yr] -7.651329542 (0.3) -5.51849269 (1) -7.651 (0.3)
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude
V magnitude
R magnitude
I magnitude
J magnitude
H magnitude
K magnitude
u magnitude 19.26 (0.03) 19.26 (0.03) 19.26 (0.03)
g magnitude 19.28 (0.01) 19.28 (0.01) 19.28 (0.01)
r magnitude 19.55 (0.02) 19.55 (0.02) 19.55 (0.02)
i magnitude 19.79 (0.03) 19.79 (0.03) 19.79 (0.03)
z magnitude 19.84 (0.1) 19.84 (0.1) 19.84 (0.1)
G magnitude 19.41 (0.04) 19.46 19.41 (0.005)
BP magnitude 19.40 (0.04) 19.35
RP magnitude 19.50 (0.05) 19.49
Pan g magnitude 19.34 (0.01)
Pan r magnitude 19.58 (0.01)
Pan i magnitude 19.82 (0.01)
Pan z magnitude 19.98 (0.03)
Pan y magnitude 20.16 (0.06)
E(B-V) 0.040

* Constant surface field

Special notes:

Spectra

Controls

Normalize at:
Normalize by mean flux

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 (Université de Montréal) and Dr. Simon Blouin (University of Victoria). Please send database updates, corrections, suggestions or bug reports to patrick.dufour@umontreal.ca.