CONFIRMED LMC
Equatorial coordinates
α = 87.180981 ± 0.023063 | 05 48 43.4317066
δ = -67.602860 ± 0.023484 | -67 36 10.309134 |
|
Constellation |
Dorado |
Symbiotic IR Type |
S |
Spectral Type |
C2.1J |
Magnitude range (V) |
14.5-16.8 |
Outbursts |
Z And? |
|
|
Identifiers
Position
Right ascension (°) |
87.180981 ± 0.023063 |
Parallax (mas) |
– |
Reddening E(B-V) (mag) |
0.103 ± 0.015 |
Declination (°) |
-67.602860 ± 0.023484 |
Distance (kpc) |
49.97 ± 0.19 |
|
|
Galactic longitude (°) |
277.6270266 ± 0.023484 |
Proper motion in α (mas/yr) |
1.400171 ± 0.048563 |
|
|
Galactic latitude (°) |
-30.879002 ± 0.023063 |
Proper motion in δ (mas/yr) |
0.843894 ± 0.053309 |
|
|
Observations
U (mag) |
|
X-Ray |
Yes |
Flickering |
|
B (mag) |
16.71 |
X-Ray type |
α |
Outbursts |
Yes |
V (mag) |
15.51 |
IUE |
Yes |
Type |
Z And? |
R (mag) |
15.17 |
IRAS flux at 12 μm (Jy) |
|
IPmax (eV) |
97.1 |
I (mag) |
14.07 |
IRAS flux at 25 μm (Jy) |
|
OVI lines |
No |
G (mag) |
15.16 |
IRAS flux at 60 μm (Jy) |
|
|
|
J (mag) |
12.51 |
IRAS flux at 100 μm (Jy) |
|
|
|
H (mag) |
11.65 |
WISE W1 (mag) |
11.01 |
|
|
K (mag) |
11.33 |
WISE W2 (mag) |
11.07 |
|
|
L (mag) |
10.90 |
WISE W3 (mag) |
10.54 |
|
|
|
|
WISE W4 (mag) |
9.36 |
|
|
|
|
Radio |
|
|
|
|
|
Radio flux (mJy) |
|
|
|
Orbit
Orbital period (days) |
1050 ± 0.5 |
γ velocity (km/h) |
|
Size of giant’s orbit (AU) |
|
Eccentricity |
|
RV of giant (km/h) |
|
Separation (AU) |
|
Inclination (°) |
|
Inferior conj. of giant (JD) |
|
Mass function |
|
Ephemeris type |
Min(B) |
|
|
Mass ratio |
|
Ephemeris T0 (JD) |
2449885.6 ± 7.4 |
|
|
|
|
Cool component
Spectral type |
C2.1J |
Mass (M⊙) |
2 |
Pulsation |
Yes |
Eff. temperature (K) |
3500 ± 250
3662 |
Radius (R⊙) |
190
230 |
Type |
|
IR type |
S |
Luminosity (L⊙) |
9120
3900 |
Pulsation period (days) |
72 ± 1 |
Metallicity [Fe/H] |
|
|
|
Ephemeris type |
Min(I) |
|
|
|
|
Ephemeris T0 (JD) |
2456035 ± 1 |
Hot component
Type/Spectra |
|
Mass (M⊙) |
|
Spin period (min) |
|
Eff. temperature (K) |
100000
85000 |
Radius (R⊙) |
0.40 |
Accretion disk |
|
Lower limit (K) |
|
Luminosity (L⊙) |
1600
7500 |
|
|
Upper limit (K) |
|
|
|
|
|
Links
SIMBAD CDS Portal VSX
Notes
The giant companion was spectroscopically classified as a carbon star. The photographic light curve revealed a 2.5 mag outburst which started in 1930 and the star remained active in the optical for at least 14 years (Iłkiewicz et al., 2015).
References
- Akras, S., Guzman-Ramirez, L., Leal-Ferreira, M. L., et al., 2019, ApJS, 240, 21, 2019ApJS..240…21A
- Allen, D. A., 1980, Astrophysical Letters, 20, 131, 1980ApL….20..131A
- Angeloni, R., Ferreira Lopes, C. E., Masetti, N., et al., 2014, MNRAS, 438, 35, 2014MNRAS.438…35A
- Bickert, K. F., Stencel, R. E., Luthardt, R., 1993, Planetary Nebulae, 405, 1993IAUS..155..405B
- Iłkiewicz, K., Mikołajewska, J., Miszalski, B., et al., 2015, MNRAS, 451, 3909, 2015MNRAS.451.3909I
- Kafatos, M., Michalitsianos, A. G., Allen, D. A., et al., 1983, ApJ, 275, 584, 1983ApJ…275..584K
- Morgan, D. H., 1992, MNRAS, 258, 639, 1992MNRAS.258..639M
Last updated: May 2, 2019 @ 11:08 am