J04572+4303

LAMOSTJ045715.16+430320.3  ·  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]27946 ± 718
log g5.455 ± 0.113
log n(He)/n(H)-2.744 ± 0.231
reduced χ²1.012 over 637 points
radial velocity-148.0 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 18:26:46

Fit — Lei (TLUSTY)

Teff [K]27680 ± 540
log g5.480 ± 0.080
log n(He)/n(H)-2.870 ± 0.270
gridsLei et al. 2019, ApJ 881, 135
SYNSPEC 49 spectra from NLTE TLUSTY 204 model atmospheres, through XTgrid

Observation

cosmic rays5 pixels cancelled
source filespec-57428-GAC071N42M1_sp13-143.fits.gz

Gaia astrometry

Gaia DR3 source205078336132788352
parallax [mas]0.5762 ± 0.0479
G16.007
Gabs4.916
μα [mas/yr]0.041
μδ [mas/yr]-3.755
l, b162.863, 0.031

Published (Culpan et al. 2022)

class (Culpan)sdB
Teff [K]27680 ± 540
log g5.48 ± 0.08
log y-2.87 ± 0.27
reference2019ApJ...881..135L

Fitted lines

lineλ [Å]shift [Å]continuum at±avgfitted over
Hβ4861.32-2.40-40.0, 40.05.0-45.0, 45.0
Hγ4340.46-2.14-40.0, 36.84.5-43.0, 43.0
Hδ4101.73-2.02-40.0, 31.64.2-43.0, 43.0
Hε3970.07-1.96-28.0, 30.04.1-30.0, 35.0
Hζ3889.05-1.92-20.0, 26.24.0-31.8, 32.0
Hη3835.38-1.89-20.0, 14.64.0-20.7, 21.8
Hθ3797.90-1.87-16.0, 16.03.9-15.6, 16.7
Hι3770.63-1.86-13.0, 13.03.9-11.7, 11.6
He II 46864685.70-2.31-11.9, 11.94.9-15.0, 13.8
He I 44724471.60-2.21-15.0, 15.04.6-15.0, 15.0
He I 40264026.29-1.99-24.2, 15.04.2-15.0, 15.0
He I 49224921.93-2.43-15.0, 15.05.1-15.0, 15.0