PG 0921+092

All names: GALEX J092355.2+085716, Gaia DR3 587622861205266688, USNO-B1.0 0989-00187782, SDSS J092355.26+085717.3, PG 0921+092, Gaia DR2 587622861205266688, SDSS J092355.25+085716.9, Gaia EDR3 587622861205266688, WD 0921+091, LAMOST J092355.26+085717.3

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR12 MWDD HE Gaia DR2 Stilism Guo et al. 2015 Koester & Kepler 2015 Bergeron et al. 2011 Voss et al. 2007 Beauchamp et al. 1999 Vincent et al. 2024 Simbad Eisenstein et al. 2006 White Dwarf Catalog (McCook & Sion 1999) Kleinman et al. 2013 Vincent et al. 2023
Right ascension 09 23 55.24 (0.06) 09 23 55.26 09 23 55.24 (0.09) 09 23 55.24 09 23 55.27 (0.06) 09 23 55.26 09 23 54.50 09 23 55.26
Declination 08 57 16.74 (0.04) 08 57 17.34 08 57 16.76 (0.06) 08 57 16.74 08 57 17.46 (0.04) 08 57 17.34 08 57 11.16 08 57 17.34
Spectral type DBA DB DBA DB DB DBA+M DBA DB2 DBAM: DB
Effective temperature [K] 17783.0 20501.0 (148) 19430.0 (522) 18713.0 23000.0 19201.0 (646) 19992.0 (127) 22816.0 (248)
log(g) [cgs] 7.87 7.96 (0.02) 8.01 (0.07) 7.96 8.01 7.99 (0.03) 8.15 (0.02) 8.02 (0.02)
Mass [M] 0.525 0.6 (0.04) 0.571 0.59 (0.03)
log(Luminosity) [L] -1.68
Cooling age [Gyr] 0.0868 0.0871 0.8590
log(H/He) -4.16 (0.1) -4.63 (0.4) -4.81
log(C/He)
log(Ca/He) <-5.43
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] 6.72 (0.08) 6.64 (0.1) 6.72 6.72 (0.08)
Distance [pc] 148.82 (2) 150.63 (2) 154.00 123.00 148.82 148.82 (2)
Composition He He He
Proper motion (right ascension) [mas/yr] -27.57008739 (0.08) -27.37385712 (0.2) -27.57 (0.08) -25.6
Proper motion (declination) [mas/yr] -45.36587683 (0.05) -45.61924021 (0.1) -45.366 (0.05) -45.6
Variability NOV
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude 16.30
V magnitude 16.19 16.19
R magnitude 16.60
I magnitude
J magnitude 17.00 (0.01)
H magnitude
K magnitude 17.20 (0.06)
u magnitude 16.28 (0.006) 16.28 (0.006) 16.25 (0.02) 16.25 16.29 (0.02)
g magnitude 16.37 (0.004) 16.37 (0.004) 16.36 (0.02) 16.36 16.40 (0.02)
r magnitude 16.72 (0.004) 16.72 (0.004) 16.73 (0.03) 16.73 16.75 (0.03)
i magnitude 17.02 (0.005) 17.02 (0.005) 17.00 (0.02) 17.00 17.02 (0.02)
z magnitude 17.30 (0.01) 17.30 (0.01) 17.30 (0.03) 17.29 17.32 (0.03)
G magnitude 16.57 (0.005) 16.59 16.57 16.57 (0.003)
BP magnitude 16.50 (0.005) 16.46
RP magnitude 16.73 (0.006) 16.72
Pan g magnitude 16.45 (0.006)
Pan r magnitude 16.76 (0.003)
Pan i magnitude 17.05 (0.004)
Pan z magnitude 17.28 (0.01)
Pan y magnitude 17.45 (0.01)
E(B-V) 0.009

* 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.