CONFIRMED M33
Equatorial coordinates
α = 23.625507 | 01 34 30.122000
δ = 30.562744 | +30 33 45.880000 |
|
| Constellation |
Triangulum |
| Symbiotic IR Type |
|
| Spectral Type |
M2, s-process enrichment |
| Magnitude range (V) |
|
| Outbursts |
No |
|
|
Identifiers
| M33SyS J013430.14+303346.0 |
GSC – |
TYC – |
WRAY – |
| SIMBAD M33SyS J013430.14+303346.0 |
HIP – |
SAO – |
Hen – |
| BD – |
IRAS – |
GAIA DR2 – |
ESO – |
| HD – |
2MASS – |
WISE – |
AAVSO – |
Position
| Right ascension (°) |
23.625507 |
Parallax (mas) |
– |
Reddening E(B-V) (mag) |
0.040 ± 0.002 |
| Declination (°) |
30.562744 |
Distance (kpc) |
847.00 ± 60.00 |
|
|
| Galactic longitude (°) |
133.793866 |
Proper motion in α (mas/yr) |
– |
|
|
| Galactic latitude (°) |
-31.399095 |
Proper motion in δ (mas/yr) |
– |
|
|
Observations
| U (mag) |
22.48 |
X-Ray |
|
Flickering |
|
| B (mag) |
23.13 |
X-Ray type |
|
Outbursts |
No |
| V (mag) |
22.65 |
IUE |
No |
Type |
|
| R (mag) |
21.32 |
IRAS flux at 12 μm (Jy) |
|
IPmax (eV) |
114.0 |
| I (mag) |
20.17 |
IRAS flux at 25 μm (Jy) |
|
OVI lines |
Yes |
| G (mag) |
|
IRAS flux at 60 μm (Jy) |
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| J (mag) |
|
IRAS flux at 100 μm (Jy) |
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| H (mag) |
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WISE W1 (mag) |
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| K (mag) |
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WISE W2 (mag) |
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| L (mag) |
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WISE W3 (mag) |
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WISE W4 (mag) |
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Radio |
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Radio flux (mJy) |
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Orbit
| Orbital period (days) |
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γ velocity (km/h) |
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Size of giant’s orbit (AU) |
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| Eccentricity |
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RV of giant (km/h) |
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Separation (AU) |
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| Inclination (°) |
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Inferior conj. of giant (JD) |
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Mass function |
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| Ephemeris type |
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Mass ratio |
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| Ephemeris T0 (JD) |
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Cool component
| Spectral type |
M2, s-process enrichment |
Mass (M⊙) |
|
Pulsation |
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| Eff. temperature (K) |
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Radius (R⊙) |
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Type |
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| IR type |
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Luminosity (L⊙) |
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Pulsation period (days) |
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| Metallicity [Fe/H] |
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Ephemeris type |
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| |
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Ephemeris T0 (JD) |
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Hot component
| Type/Spectra |
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Mass (M⊙) |
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Spin period (min) |
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| Eff. temperature (K) |
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Radius (R⊙) |
|
Accretion disk |
|
| Lower limit (K) |
114000 |
Luminosity (L⊙) |
|
|
|
| Upper limit (K) |
169000 |
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Links
SIMBAD CDS Portal
Notes
M33SyS J013430.14+303346.0 show clearly detectable ZrO bands which indicates some s-process enrichment. It was misclassified as a W Vir star with a 29.12 period by Kinman et al. (1987), however, the average gaps between original observations are comparable to the period (Mikołajewska et al., 2017).
References
- Kinman, T. D., Mould, J. R., Wood, P. R., 1987, AJ, 93, 833, 1987AJ…..93..833K
- Mikołajewska, J., Shara, M. M., Caldwell, N., et al., 2017, MNRAS, 465, 699, 2017MNRAS.465.1699M
Last updated: Jan 14, 2019 @ 2:28 pm
