Misplaced Pages

LP Andromedae

A near-infrared (L band) light curve for LP Andromedae, adapted from Jones et al. (1990)
Observation data Epoch J2000      Equinox J2000
Constellation	Andromeda
Right ascension	23 34 27.5216
Declination	+43° 33′ 01.2996″
Apparent magnitude (V)	15.12 variable
Characteristics
Spectral type	C8,3.5e
Apparent magnitude (G)	16.9041
Apparent magnitude (J)	9.623
Apparent magnitude (H)	6.355
Apparent magnitude (K)	2.71
Variable type	Mira
Astrometry
Proper motion (μ)	RA: −21.313±0.532  mas/yr Dec.: −22.058±0.453 mas/yr
Parallax (π)	2.5002 ± 0.3626 mas
Distance	approx. 1,300 ly (approx. 400 pc)
Absolute bolometric magnitude (Mbol)	−5.21±0.26
Details
Mass	0.8 M☉
Radius	340 – 420 R☉
Luminosity	2,900 – 16,200 L☉
Temperature	2,100 – 3,350 K
Other designations
2MASS J23342752+4333012, IRAS 23320+4316, RAFGL 3116
Database references
SIMBAD	data

LP Andromedae (often abbreviated to LP And) is a carbon star in the constellation Andromeda. It is also a Mira variable whose mean apparent visual magnitude is 15.12 and has pulsations with an amplitude of 1.50 magnitudes and a period of 614 days.

In 1974 LP Andromedae, known then as IRC+40540, was identified as a carbon star and also shown to be variable. It had previously been suspected of variability during the 2 Micron All Sky Survey (2MASS). A detailed study of its spectrum showed an unusually cool star with a basic class of C8, and Swan band strength of 3.5. It also showed strong C isotopic bands. The period was narrowed down to around 614 days, one of the longest periods known for a Mira variable.

This star has a dusty envelope with an estimated mass of 3.2 M_☉, fueled by the star itself which is losing mass at a rate 1.9×10 M_☉/yr. Such a high mass loss rate should place LP Andromedae close to the end of its asymptotic giant branch evolution. The envelope extends to a distance of 3 parsec from the star, and is mainly made of silicon carbide and carbon particles.

See also

• List of largest known stars

References

1. Jones, Terry Jay; Bryja, C. O.; Gehrz, Robert D.; Harrison, Thomas E.; Johnson, Joni J.; Klebe, Dimitri I.; Lawrence, Geoffrey F. (November 1990). "Photometry of Variable AFGL Sources". Astrophysical Journal Supplement. 74: 785. Bibcode:1990ApJS...74..785J. doi:10.1086/191518.
2. ^ Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
3. ^ Database entry, The Catalina Surveys periodic variable star catalog. (Drake+, 2014), A. J. Drake et al., CDS ID J/ApJS/213/9 Accessed on line 2018-11-14.
4. ^ Cohen, M. (1979). "Circumstellar envelopes and the evolution of carbon stars". Monthly Notices of the Royal Astronomical Society. 186 (4): 837–852. Bibcode:1979MNRAS.186..837C. doi:10.1093/mnras/186.4.837.
5. ^ Cutri, Roc M.; Skrutskie, Michael F.; Van Dyk, Schuyler D.; Beichman, Charles A.; Carpenter, John M.; Chester, Thomas; Cambresy, Laurent; Evans, Tracey E.; Fowler, John W.; Gizis, John E.; Howard, Elizabeth V.; Huchra, John P.; Jarrett, Thomas H.; Kopan, Eugene L.; Kirkpatrick, J. Davy; Light, Robert M.; Marsh, Kenneth A.; McCallon, Howard L.; Schneider, Stephen E.; Stiening, Rae; Sykes, Matthew J.; Weinberg, Martin D.; Wheaton, William A.; Wheelock, Sherry L.; Zacarias, N. (2003). "VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)". CDS/ADC Collection of Electronic Catalogues. 2246: II/246. Bibcode:2003yCat.2246....0C.
6. Menzies, J. W.; Feast, M. W.; Whitelock, P. A. (June 2006). "Carbon-rich Mira variables: radial velocities and distances". Monthly Notices of the Royal Astronomical Society. 369 (2): 783–790. arXiv:astro-ph/0603505. Bibcode:2006MNRAS.369..783M. CiteSeerX 10.1.1.255.9712. doi:10.1111/j.1365-2966.2006.10323.x. S2CID 18684991.
7. ^ N. N. Samus; O. V. Durlevich; et al. "LP And database entry". Combined General Catalog of Variable Stars (2017 ed.). CDS. Retrieved 2018-11-14.
8. ^ Men'shchikov, A. B.; Balega, Y. Y.; Berger, M.; Driebe, T.; Hofmann, K.-H.; Maximov, A. F.; Schertl, D.; Shenavrin, V. I.; Weigelt, G. (March 2006). "Near-infrared speckle interferometry and radiative transfer modelling of the carbon star LP Andromedae". Astronomy and Astrophysics. 448 (1): 271–281. Bibcode:2006A&A...448..271M. doi:10.1051/0004-6361:20052976.
9. Lockwood, G. W. (1974). "Near-infrared photometry of unidentified IRC stars. II". The Astrophysical Journal. 192: 113. Bibcode:1974ApJ...192..113L. doi:10.1086/153041.
10. Alksnis, A. (1989). "On the Variability of the Dusty Carbon Star LP and". Information Bulletin on Variable Stars. 3396: 1. Bibcode:1989IBVS.3396....1A.

v t e Constellation of Andromeda
Adhil Andromeda in Chinese astronomy List of Andromeda's satellite galaxies List of stars in Andromeda
Stars	Bayer α (Alpheratz) β (Mirach) γ (Almach) δ ε ζ η θ ι κ λ μ ν ξ (Adhil) ο π ρ σ τ υ (Titawin) φ χ ψ ω A b c υ Per (Nembus) Flamsteed 2 3 4 5 6 7 8 9 10 11 12 13 14 (Veritate) 15 18 22 23 26 28 32 36 39 41 44 45 47 55 56 58 59 63 64 65 66 6 Per Variable R T U W Z RT RV RX SU SW TU TW WZ XZ AB AC AD AE AF AR BM BX CC CG CN DS DX EG ET EU FF GO GP GQ GX GR GY HH HN IW KK KX KZ LL LN LP LQ OP OS OU PX PY QR QV QX V385 V428 V439 V455 V529 V807 HR 1 40 56 78 104 122 134 178 275 282 283 289 379 410 483 687 746 748 8884 8925 8950 8962 8973 9011 9074 9075 9105 HD 16175 (Buna) 222155 Other 3XMM J004232.1+411314 ADS 48 HAT-P-6 (Sterrennacht) HAT-P-16 HAT-P-19 HAT-P-28 M31-RV KELT-1 NGC 44 NGC 82 NGC 84 NGC 91 NGC 162 NGC 464 Qatar-3 Qatar-4 Qatar-5 PA-99-N2 WASP-1 WISE 0146+4234 WISE J0005+3737 WISE J004945.61+215120.0
Exoplanets 14 Andromedae b κ Andromedae b υ Andromedae b c d Gliese 15 Ab c HD 13931 b HD 16175 b HAT-P-6b HAT-P-32b WASP-1b WASP-33b Qatar-4b Qatar-5b
Star clusters	NGC 206 272 752 956 7686 Other Mayall II RBC EXT8
Nebulae	NGC 7662
Galaxies	Messier 32 110 NGC 5 11 13 19 20 21 27 39 43 48 49 51 67 68 69 70 71 72 74 76 79 80 81 83 85 86 90 93 94 96 97 108 109 112 140 149 160 169 181 183 184 214 218 226 228 229 233 243 252 258 260 262 280 304 317 389 393 404 425 431 477 512 513 523 528 529 531 536 542 561 605 620 668 679 687 700 703 704 705 708 709 710 712 714 717 721 732 753 759 801 812 834 891 906 910 911 912 913 920 937 980 995 996 999 1000 7640 7836 Numbered I II III IV V VIII IX X XI XVIII XIX XXI Other 3C 66A 3C 66B Andromeda Galaxy Arp 273 Donatiello I UGC 1840
Galaxy clusters Abell 262 NGC 68 group
Astronomical events GRB 101225A SN 1885A (S)
Category

• Andromeda (constellation)
• Objects with variable star designations
• 2MASS objects
• Carbon stars
• IRAS catalogue objects
• Emission-line stars