J07250+2703

SDSSJ072501.47+270318.3  ·  Culpan knownhsd

χ²/N = 1.00

Spectrum

shaded: the intervals the fit used ·  │ a cancelled pixeldrag on either panel to zoom · dbl-click or Esc to reset · arrows to pan

The whole reduced spectrum above, the region marked on it below. Shaded bands are the intervals the fit used; a tick under the axis marks a pixel the rejection mask cancelled.

Line-profile fit — Bamberg

profile fit on the Bamberg grid
Observed spectrum in black, model in red, offset by line. Balmer series left, helium right.

Results and provenance

Fit — Bamberg

Teff [K]30727 ± 325
log g5.829 ± 0.047
log n(He)/n(H)-2.248 ± 0.063
reduced χ²0.999 over 639 points
radial velocity-88.0 km s−1
resolution (FWHM)2.50 Å
lines fitted12
gridsHE-0.041.fits
HE-0.125.fits
HE-0.300.fits
HE-0.550.fits
+9 more
fitted04/09/2026 18:28:25

Fit — Lei (TLUSTY)

Teff [K]31890 ± 420
log g5.570 ± 0.120
log n(He)/n(H)-2.290 ± 0.060
gridsLei et al. 2020, ApJ 889, 117
SYNSPEC 49 spectra from NLTE TLUSTY 204 model atmospheres, through XTgrid

Observation

cosmic rays6 pixels cancelled
source filespec-58081-GAC113N27M1_sp10-248.fits.gz

Gaia astrometry

Gaia DR3 source872695092069071360
parallax [mas]0.6847 ± 0.0622
G16.161
Gabs5.366
μα [mas/yr]-2.884
μδ [mas/yr]-1.907
l, b191.518, 18.853

Published (Culpan et al. 2022)

class (Culpan)sdB
class (SIMBAD)sd
Teff [K]32331 ± 140
log g6.00 ± 0.03
log y-2.30 ± 0.04
reference2021ApJS..256...28L

Fitted lines

lineλ [Å]shift [Å]continuum at±avgfitted over
Hβ4861.32-1.43-40.0, 40.05.0-45.0, 45.0
Hγ4340.46-1.27-40.0, 36.84.5-43.0, 43.0
Hδ4101.73-1.20-40.0, 31.64.2-43.0, 43.0
Hε3970.07-1.17-28.0, 30.04.1-30.0, 35.0
Hζ3889.05-1.14-20.0, 26.24.0-31.8, 32.0
Hη3835.38-1.13-20.0, 14.64.0-20.7, 21.8
Hθ3797.90-1.11-16.0, 16.03.9-15.6, 16.7
Hι3770.63-1.11-13.0, 13.03.9-11.7, 11.6
He II 46864685.70-1.38-11.9, 11.94.9-15.0, 13.8
He I 44724471.60-1.31-15.0, 15.04.6-15.0, 15.0
He I 40264026.29-1.18-24.2, 15.04.2-15.0, 15.0
He I 49224921.93-1.44-15.0, 15.05.1-15.0, 15.0