J21220+2141

LAMOSTJ212205.57+214111.5  ·  Culpan knownhsd

χ²/N = 1.01

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]26467 ± 312
log g5.537 ± 0.049
log n(He)/n(H)-2.734 ± 0.108
reduced χ²1.007 over 659 points
radial velocity-96.0 km s−1
resolution (FWHM)2.50 Å
lines fitted13
gridsHE-0.041.fits
HE-0.125.fits
HE-0.300.fits
HE-0.550.fits
+9 more
fitted04/09/2026 18:33:28

Fit — Lei (TLUSTY)

Teff [K]27620 ± 180
log g5.500 ± 0.020
log n(He)/n(H)-2.610 ± 0.030
gridsLei et al. 2020, ApJ 889, 117
SYNSPEC 49 spectra from NLTE TLUSTY 204 model atmospheres, through XTgrid

Observation

cosmic rays21 pixels cancelled
source filespec-58043-GACII320N19B1_sp11-200.fits.gz

Gaia astrometry

Gaia DR3 source1790728894004387712
parallax [mas]0.8922 ± 0.0577
G15.164
Gabs4.989
μα [mas/yr]1.906
μδ [mas/yr]-2.703
l, b71.559, -19.683

Published (Culpan et al. 2022)

class (Culpan)sdB
Teff [K]27345 ± 321
log g5.40 ± 0.04
log y-2.87 ± 0.06
reference2021ApJS..256...28L

Fitted lines

lineλ [Å]shift [Å]continuum at±avgfitted over
Hβ4861.32-1.56-40.0, 40.05.0-45.0, 45.0
Hγ4340.46-1.39-40.0, 36.84.5-43.0, 43.0
Hδ4101.73-1.31-40.0, 31.64.2-43.0, 43.0
Hε3970.07-1.27-28.0, 30.04.1-30.0, 35.0
Hζ3889.05-1.25-20.0, 26.24.0-31.8, 32.0
Hη3835.38-1.23-20.0, 14.64.0-20.7, 21.8
Hθ3797.90-1.22-16.0, 16.03.9-15.6, 16.7
Hι3770.63-1.21-13.0, 13.03.9-11.7, 11.6
Hκ3750.15-1.20-10.0, 10.03.9-7.4, 8.7
He II 46864685.70-1.50-11.9, 11.94.9-15.0, 13.8
He I 44724471.60-1.43-15.0, 15.04.6-15.0, 15.0
He I 40264026.29-1.29-24.2, 15.04.2-15.0, 15.0
He I 49224921.93-1.58-15.0, 15.05.1-15.0, 15.0