J15270+4204

SDSSJ152702.21+420407.1  ·  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]29932 ± 341
log g5.739 ± 0.056
log n(He)/n(H)-2.778 ± 0.152
reduced χ²0.983 over 639 points
radial velocity-90.0 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 18:31:37

Fit — Lei (TLUSTY)

Teff [K]30860 ± 150
log g5.730 ± 0.050
log n(He)/n(H)-2.900 ± 0.150
gridsLei et al. 2019, ApJ 881, 135
SYNSPEC 49 spectra from NLTE TLUSTY 204 model atmospheres, through XTgrid

Observation

source filespec-57893-HD153055N404958B02_sp15-155.fits.gz

Gaia astrometry

Gaia DR3 source1390836583700955264
parallax [mas]0.3267 ± 0.0542
G16.298
Gabs3.903
μα [mas/yr]-2.111
μδ [mas/yr]-6.190
l, b68.462, 55.053

Published (Culpan et al. 2022)

class (Culpan)sdB
class (SIMBAD)sdBO
Teff [K]29168 ± 1020
log g5.58 ± 0.16
log y-3.00 ± 0.20
reference2017OAst...26..164G

Fitted lines

lineλ [Å]shift [Å]continuum at±avgfitted over
Hβ4861.32-1.46-40.0, 40.05.0-45.0, 45.0
Hγ4340.46-1.30-40.0, 36.84.5-43.0, 43.0
Hδ4101.73-1.23-40.0, 31.64.2-43.0, 43.0
Hε3970.07-1.19-28.0, 30.04.1-30.0, 35.0
Hζ3889.05-1.17-20.0, 26.24.0-31.8, 32.0
Hη3835.38-1.15-20.0, 14.64.0-20.7, 21.8
Hθ3797.90-1.14-16.0, 16.03.9-15.6, 16.7
Hι3770.63-1.13-13.0, 13.03.9-11.7, 11.6
He II 46864685.70-1.41-11.9, 11.94.9-15.0, 13.8
He I 44724471.60-1.34-15.0, 15.04.6-15.0, 15.0
He I 40264026.29-1.21-24.2, 15.04.2-15.0, 15.0
He I 49224921.93-1.48-15.0, 15.05.1-15.0, 15.0