| 词条 | LP Andromedae |
| 释义 |
| name= LP Andromedae }}{{Starbox observe | epoch=J2000 | ra={{RA|23|34|27.5216}}[1] | dec={{DEC|+43|33|01.2996}}[1] | appmag_v= 15.12 variable[3] | constell=Andromeda }}{{Starbox character | class=C8,3.5e[4] | appmag_1_passband = G | appmag_1 = 16.9041[1] | appmag_2_passband = J | appmag_2 = 9.623[6] | appmag_3_passband = H | appmag_3 = 6.355[6] | appmag_4_passband = K | appmag_4 = 2.71[8] | r-i = | v-r = | b-v = | u-b = | j-h = | j-k = | variable = Mira[9] }}{{Starbox astrometry | radial_v= | prop_mo_ra={{val|-21.313|0.532}} [1] | prop_mo_dec={{val|-22.058|0.453}}[1] | parallax= 2.5002 | p_error= 0.3626 | parallax_footnote = [1] | dist_ly = | dist_pc = | absmag_v = | absmag_bol = {{val|-5.21|0.26}}[13] }}{{Starbox detail | source = [13] | mass = 0.8 | mass_mj = | radius = 340 – 420 | radius_rj = | radius_km = | luminosity = 2,900 – 16,200 | luminosity_bolometric = | luminosity_visual = | habitable_inner = | habitable_outer = | gravity = | temperature = 2,100 – 3,350 | metal = | metal_fe = | rotation = | rotational_velocity = | age = | age_myr = | age_gyr = }}{{Starbox catalog | names=2MASS J23342752+4333012, IRAS 23320+4316 }}{{Starbox reference | }}{{Starbox end}}LP Andromedae (often abbreviated to LP And) is a carbon star in the constellation Andromeda. It is also a Mira variable[9] whose mean apparent visual magnitude is 15.12 and has pulsations with an amplitude of 1.50 magnitudes[3] and a period of 614 days.[13] In 1974 LP Andromedae, known then as IRC+40540, was identified as a carbon star and also shown to be variable.[18] 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 C13 isotopic bands.[4] 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 {{solar mass}}, fueled by the star itself which is losing mass at a rate 1.9{{e|-5}} {{solar mass}}/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.[13] References1. ^1 2 3 4 5 {{cite DR2|1924974006717286912}} [2][3][4][5][6][7][8]2. ^1 2 {{cite web|url=http://webviz.u-strasbg.fr/viz-bin/VizieR-S?V*%20LP%20And |title=LP And database entry |work=Combined General Catalog of Variable Stars |edition=2017 |author1=N. N. Samus |author2=O. V. Durlevich |display-authors=etal |publisher=CDS |accessdate=2018-11-14}} 3. ^1 2 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. ^1 {{cite journal|doi=10.1086/153041|title=Near-infrared photometry of unidentified IRC stars. II|journal=The Astrophysical Journal|volume=192|pages=113|year=1974|last1=Lockwood|first1=G. W.}} 5. ^1 {{cite journal | title=Carbon-rich Mira variables: radial velocities and distances | last1=Menzies | first1=J. W. | last2=Feast | first2=M. W. | last3=Whitelock | first3=P. A. | journal=Monthly Notices of the Royal Astronomical Society | volume=369 | issue=2 | pages=783–790 | date=June 2006 | bibcode=2006MNRAS.369..783M | doi=10.1111/j.1365-2966.2006.10323.x| citeseerx=10.1.1.255.9712 }} 6. ^1 2 3 4 {{cite journal |title=Near-infrared speckle interferometry and radiative transfer modelling of the carbon star LP Andromedae |journal=Astronomy and Astrophysics |pages=271–281 |last1=Men'shchikov |first1=A. B. |last2=Balega |first2=Y. Y. |last3=Berger |first3=M. |last4=Driebe |first4=T. |last5=Hofmann |first5=K.-H. |last6=Maximov |first6=A. F. |last7=Schertl |first7=D. |last8=Shenavrin |first8=V. I. |last9=Weigelt |first9=G. |volume=448 | issue=1 | date=March 2006 |bibcode=2006A&A...448..271M | doi=10.1051/0004-6361:20052976}} 7. ^1 2 {{cite journal |title=VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003) |journal=CDS/ADC Collection of Electronic Catalogues |pages=II/246 |last1=Cutri |first1=R. M. |last2=Skrutskie |first2=M. F. |last3=Van Dyk |first3=S. |last4=Beichman |first4=C. A. |last5=Carpenter |first5=J. M. |last6=Chester |first6=T. |last7=Cambresy |first7=L. |last8=Evans |first8=T. |last9=Fowler |first9=J. |last10=Gizis |first10=J. |last11=Howard |first11=E. |last12=Huchra |first12=J. |last13=Jarrett |first13=T. |last14=Kopan |first14=E. L. |last15=Kirkpatrick |first15=J. D. |last16=Light |first16=R. M. |last17=Marsh |first17=K. A. |last18=McCallon |first18=H. |last19=Schneider |first19=S. |last20=Stiening |first20=R. |last21=Sykes |first21=M. |last22=Weinberg |first22=M. |last23=Wheaton |first23=W. A. |last24=Wheelock |first24=S. |last25=Zacarias |first25=N. |display-authors=3 |number=2246 |date=June 2003 |bibcode=2003yCat.2246....0C}} 8. ^1 2 {{cite journal|bibcode=1979MNRAS.186..837C|title=Circumstellar envelopes and the evolution of carbon stars|journal=Monthly Notices of the Royal Astronomical Society|volume=186|pages=837|last1=Cohen|first1=M.|year=1979}} }}{{Stars of Andromeda}} 6 : Andromeda (constellation)|Objects with variable star designations|2MASS objects|C-type stars|IRAS catalogue objects|Emission-line stars |
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