J04449+1421

KUV04421+1416  ·  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]33756 ± 598
log g5.607 ± 0.081
log n(He)/n(H)-2.450 ± 0.171
reduced χ²0.996 over 640 points
radial velocity-134.0 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 18:26:42

Fit — Lei (TLUSTY)

Teff [K]32660 ± 320
log g5.660 ± 0.050
log n(He)/n(H)-2.490 ± 0.130
gridsLei et al. 2018, ApJ 868, 70
SYNSPEC 49 spectra from NLTE TLUSTY 204 model atmospheres, through XTgrid

Observation

source filespec-57013-GAC069N16B2_sp07-077.fits.gz

Gaia astrometry

Gaia DR3 source3308791681845675136
parallax [mas]1.4407 ± 0.0289
G14.949
Gabs5.808
μα [mas/yr]1.003
μδ [mas/yr]-6.708
l, b184.191, -19.812

Published (Culpan et al. 2022)

class (Culpan)sdBV+dM
class (SIMBAD)sdB
Teff [K]34862 ± 242
log g5.94 ± 0.04
log y-2.43 ± 0.05
reference2021ApJS..256...28L

Fitted lines

lineλ [Å]shift [Å]continuum at±avgfitted over
Hβ4861.32-2.17-40.0, 40.05.0-45.0, 45.0
Hγ4340.46-1.94-40.0, 36.84.5-43.0, 43.0
Hδ4101.73-1.83-40.0, 31.64.2-43.0, 43.0
Hε3970.07-1.77-28.0, 30.04.1-30.0, 35.0
Hζ3889.05-1.74-20.0, 26.24.0-31.8, 32.0
Hη3835.38-1.71-20.0, 14.64.0-20.7, 21.8
Hθ3797.90-1.70-16.0, 16.03.9-15.6, 16.7
Hι3770.63-1.69-13.0, 13.03.9-11.7, 11.6
He II 46864685.70-2.09-11.9, 11.94.9-15.0, 13.8
He I 44724471.60-2.00-15.0, 15.04.6-15.0, 15.0
He I 40264026.29-1.80-24.2, 15.04.2-15.0, 15.0
He I 49224921.93-2.20-15.0, 15.05.1-15.0, 15.0