J07288+0214

LAMOSTJ072849.83+021400.5  ·  Culpan knownhsd

χ²/N = 0.98

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]28332 ± 577
log g5.561 ± 0.095
log n(He)/n(H)-3.524 ± 0.499
reduced χ²0.983 over 639 points
radial velocity-159.0 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 18:28:29

Fit — Lei (TLUSTY)

Teff [K]31090 ± 330
log g5.560 ± 0.100
log n(He)/n(H)-3.130 ± 0.480
gridsLei et al. 2020, ApJ 889, 117
SYNSPEC 49 spectra from NLTE TLUSTY 204 model atmospheres, through XTgrid

Observation

cosmic rays16 pixels cancelled
source filespec-58068-HD073149N010954B01_sp15-096.fits.gz

Gaia astrometry

Gaia DR3 source3135810671409226368
parallax [mas]0.4836 ± 0.0527
G15.968
Gabs4.503
μα [mas/yr]-1.573
μδ [mas/yr]-1.151
l, b215.216, 9.336

Published (Culpan et al. 2022)

class (Culpan)sdB
Teff [K]29429 ± 262
log g5.44 ± 0.04
log y-3.09 ± 0.10
reference2021ApJS..256...28L

Fitted lines

lineλ [Å]shift [Å]continuum at±avgfitted over
Hβ4861.32-2.58-40.0, 40.05.0-45.0, 45.0
Hγ4340.46-2.30-40.0, 36.84.5-43.0, 43.0
Hδ4101.73-2.18-40.0, 31.64.2-43.0, 43.0
Hε3970.07-2.11-28.0, 30.04.1-30.0, 35.0
Hζ3889.05-2.06-20.0, 26.24.0-31.8, 32.0
Hη3835.38-2.03-20.0, 14.64.0-20.7, 21.8
Hθ3797.90-2.01-16.0, 16.03.9-15.6, 16.7
Hι3770.63-2.00-13.0, 13.03.9-11.7, 11.6
He II 46864685.70-2.49-11.9, 11.94.9-15.0, 13.8
He I 44724471.60-2.37-15.0, 15.04.6-15.0, 15.0
He I 40264026.29-2.14-24.2, 15.04.2-15.0, 15.0
He I 49224921.93-2.61-15.0, 15.05.1-15.0, 15.0