“HD 166”的意思、由来-开放百科全书

HD 166 is a K-type main sequence star, cooler and dimmer than the Sun, and has a stellar classification of K0Ve where the e suffix indicates the presence of emission lines in the spectrum. The star has a proper motion of 0.422 arcseconds per year in a direction 114.1° from north. It has an estimated visual luminosity of 61% of the Sun,^[14] and is emitting like a blackbody with an effective temperature of 5,327K.^[17] It has a diameter that is about 90% the size of the Sun^[14] and a radial velocity of −6.9 km/s.^[5] Age estimates range from as low as 78 million years old based on its chromospheric activity,^[17] up to 9.6 billion years based on a comparison with theoretical evolutionary tracks.^[14] X-ray emission has been detected from this star, with an estimated luminosity of {{val|8.5e28|u=erg s⁻¹}}.^[33]

An infrared excess has been detected around HD 166, most likely indicating the presence of a circumstellar disk at a radius of 7.5 AU. The temperature of this dust is 90 K.^[34]

Variability

It has been found that the periodicity in the photometric variability of HD 166 is coincident with the rotation period.^[20] This leads to its classification as a BY Draconis variable, where brightness variations are caused by the presence of large starspots on the surface and by chromospheric activity.

References

1. ^¹²³⁴{{Cite DR2|2860924621205256704}}
2. ^Autostar Suite Astronomer Edition. CD-ROM. Meade, April 2006.
3. ^¹{{citation | display-authors=1 | last1=Holmberg | first1=J. | last2=Nordström | first2=B. | last3=Andersen | first3=J. | title=The Geneva-Copenhagen survey of the solar neighbourhood. III. Improved distances, ages, and kinematics | volume=501 | issue=3 |date=July 2009 | pages=941–947 | journal=Astronomy and Astrophysics | doi=10.1051/0004-6361/200811191 | bibcode=2009A&A...501..941H | arxiv=0811.3982 | postscript=. }}
4. ^¹{{citation | last1=Micela | first1=G. | last2=Favata | first2=F. | last3=Sciortino | first3=S. | title=HIPPARCOS distances of X-ray selected stars: implications on their nature as stellar population | journal=Astronomy and Astrophysics | volume=326 | pages=221–227 |date=October 1997 | bibcode=1997A&A...326..221M }}
5. ^¹²³{{cite journal | author=Gaidos | display-authors=etal | title=Spectroscopy and Photometry of Nearby Young Solar Analogs | journal=The Astronomical Journal | volume=120 | issue=2 | year=2000 | pages=1006–1013 | doi=10.1086/301488 | bibcode=2000AJ....120.1006G| citeseerx=10.1.1.43.4478 }}
6. ^¹²³⁴⁵⁶{{citation | last1 = Boyajian | first1 = Tabetha S. | last2 = von Braun | first2 = Kaspar | last3 = van Belle | first3 = Gerard | last4 = Farrington | first4 = Chris | last5 = Schaefer | first5 = Gail | last6 = Jones | first6 = Jeremy | last7 = White | first7 = Russel | last8 = McAlister | first8 = Harold A. | last9 = ten Brummelaar | first9 = Theo A. | last10 = Ridgway | first10 = Stephen | last11 = Gies | first11 = Douglas | last12 = Sturmann | first12 = Laszlo | last13 = Sturmann | first13 = Judit | last14 = Turner | first14 = Nils H. | last15 = Goldfinger | first15 = P. J. | last16 = Vargas | first16 = Norm | display-authors = 1 | title = Stellar Diameters and Temperatures. III. Main-sequence A, F, G, and K Stars: Additional High-precision Measurements and Empirical Relations | journal = The Astrophysical Journal | volume = 771 | issue = 1 | page = 40 |date=July 2013 | arxiv = 1306.2974 | doi = 10.1088/0004-637X/771/1/40 | bibcode = 2013ApJ...771...40B | postscript = .}}
7. ^¹{{cite journal | display-authors=1 | last1=Eiroa | first1=C. | last2=Marshall | first2=J. P. | last3=Mora | first3=A. | last4=Montesinos | first4=B. | last5=Absil | first5=O. | last6=Augereau | first6=J. Ch. | last7=Bayo | first7=A. | last8=Bryden | first8=G. | last9=Danchi | first9=W. | last10=del Burgo | first10=C. | last11=Ertel | first11=S. | last12=Fridlund | first12=M. | last13=Heras | first13=A. M. | last14=Krivov | first14=A. V. | last15=Launhardt | first15=R. | last16=Liseau | first16=R. | last17=Löhne | first17=T. | last18=Maldonado | first18=J. | last19=Pilbratt | first19=G. L. | last20=Roberge | first20=A. | last21=Rodmann | first21=J. | last22=Sanz-Forcada | first22=J. | last23=Solano | first23=E. | last24=Stapelfeldt | first24=K. | last25=Thébault | first25=P. | last26=Wolf | first26=S. | last27=Ardila | first27=D. | last28=Arévalo | first28=M. | last29=Beichmann | first29=C. | last30=Faramaz | first30=V. | last31=González-García | first31=B. M. | last32=Gutiérrez | first32=R. | last33=Lebreton | first33=J. | last34=Martínez-Arnáiz | first34=R. | last35=Meeus | first35=G. | last36=Montes | first36=D. | last37=Olofsson | first37=G. | last38=Su | first38=K. Y. L. | last39=White | first39=G. J. | last40=Barrado | first40=D. | last41=Fukagawa | first41=M. | last42=Grün | first42=E. | last43=Kamp | first43=I. | last44=Lorente | first44=R. | last45=Morbidelli | first45=A. | last46=Müller | first46=S. | last47=Mutschke | first47=H. | last48=Nakagawa | first48=T. | last49=Ribas | first49=I. | last50=Walker | first50=H. | title=DUst around NEarby Stars. The survey observational results | journal=Astronomy & Astrophysics | volume=555 | page=A11 | date=July 2013 | doi=10.1051/0004-6361/201321050 | bibcode=2013A&A...555A..11E | arxiv=1305.0155}}
8. ^¹²{{citation | last1=Mermilliod | first1=J.-C. | title=Compilation of Eggen's UBV data, transformed to UBV (unpublished) | journal=Catalogue of Eggen's UBV Data. SIMBAD | pages=0 | date=1986 | bibcode=1986EgUBV........0M}}
9. ^¹²³⁴{{cite journal | bibcode=2006ApJ...643.1160L| title=The Nearest Young Moving Groups| journal=The Astrophysical Journal| volume=643| issue=2| pages=1160| last1=López-Santiago| first1=J.| last2=Montes| first2=D.| last3=Crespo-Chacón| first3=I.| last4=Fernández-Figueroa| first4=M. J.| year=2006}}
10. ^¹²³⁴⁵⁶{{cite journal | bibcode=2017MNRAS.472.1736R| title=The fundamental stellar parameters of FGK stars in the SEEDS survey Norman, OK 73071, USA| journal=Monthly Notices of the Royal Astronomical Society| volume=472| issue=2| pages=1736| last1=Rich| first1=Evan A.| last2=Wisniewski| first2=John P.| last3=McElwain| first3=Michael W.| last4=Hashimoto| first4=Jun| last5=Kudo| first5=Tomoyuki| last6=Kusakabe| first6=Nobuhiko| last7=Okamoto| first7=Yoshiko K.| last8=Abe| first8=Lyu| last9=Akiyama| first9=Eiji| last10=Brandner| first10=Wolfgang| last11=Brandt| first11=Timothy D.| last12=Cargile| first12=Phillip| last13=Carson| first13=Joseph C.| last14=Currie| first14=Thayne M.| last15=Egner| first15=Sebastian| last16=Feldt| first16=Markus| last17=Fukagawa| first17=Misato| last18=Goto| first18=Miwa| last19=Grady| first19=Carol A.| last20=Guyon| first20=Olivier| last21=Hayano| first21=Yutaka| last22=Hayashi| first22=Masahiko| last23=Hayashi| first23=Saeko S.| last24=Hebb| first24=Leslie| last25=Hełminiak| first25=Krzysztof G.| last26=Henning| first26=Thomas| last27=Hodapp| first27=Klaus W.| last28=Ishii| first28=Miki| last29=Iye| first29=Masanori| last30=Janson| first30=Markus| displayauthors=29| year=2017}}

词条	HD 166
释义	Star characteristics Variability References External links {{Starbox begin \| name = HD 166 }}{{Starbox observe \| epoch = J2000.0 \| constell = Andromeda \| ra = {{RA\|00\|06\|36.7841}}^[1] \| dec = {{DEC\|+29\|01\|17.4103}}^[1] \| appmag_v = 6.13 – 6.17 }}{{Starbox character \| class = K0Ve^[5] \| b-v = +0.755^[6] \| u-b = +0.30^[6] \| variable = BY Dra }}{{Starbox astrometry \| radial_v = {{val\|−6.9\|0.2}}^[5] \| prop_mo_ra = {{val\|380.092\|0.060}}^[1] \| prop_mo_dec = {{val\|−177.573\|0.037}}^[1] \| parallax = 72.5764 \| p_error = 0.0498 \| parallax_footnote = ^[1] \| absmag_v = 5.41^[13] }}{{Starbox detail \| mass = 0.889^[14] \| radius = {{val\|0.9172\|0.0090}}^[14] \| luminosity = {{val\|0.6078\|0.0099}}^[14] \| temperature = {{val\|5,509\|34}}^[17] \| gravity = {{val\|4.49\|0.09}}^[17] \| metal_fe = {{val\|0.00\|0.03}}^[17] \| rotational_velocity = 4.1 ^[20] \| rotation = {{val\|6.23\|0.01}} days^[20] \| age_myr = {{val\|78\|28}}^[17] }}{{Starbox catalog \| names = BD+28°4704, GC 95, GSC 01735-02532, GSC 01735-00927, Gliese 5, HD 166, HIP 544, HR 8, SAO 73743, NSV 33 }}{{Starbox reference \| Simbad = HD+166 }}{{Starbox end}}HD 166 or V439 Andromedae (ADS 69 A) is a 6th magnitude star in the constellation Andromeda, approximately 45 light years away from Earth. It is a variable star of the BY Draconis type, varying between magnitudes 6.13 and 6.18 with a 6.23 days periodicity. It appears within one degree of the star Alpha Andromedae^[2] and is a member of the Hercules-Lyra moving group.^[5] Star characteristics HD 166 is a K-type main sequence star, cooler and dimmer than the Sun, and has a stellar classification of K0Ve where the e suffix indicates the presence of emission lines in the spectrum. The star has a proper motion of 0.422 arcseconds per year in a direction 114.1° from north. It has an estimated visual luminosity of 61% of the Sun,^[14] and is emitting like a blackbody with an effective temperature of 5,327K.^[17] It has a diameter that is about 90% the size of the Sun^[14] and a radial velocity of −6.9 km/s.^[5] Age estimates range from as low as 78 million years old based on its chromospheric activity,^[17] up to 9.6 billion years based on a comparison with theoretical evolutionary tracks.^[14] X-ray emission has been detected from this star, with an estimated luminosity of {{val\|8.5e28\|u=erg s⁻¹}}.^[33] An infrared excess has been detected around HD 166, most likely indicating the presence of a circumstellar disk at a radius of 7.5 AU. The temperature of this dust is 90 K.^[34] Variability It has been found that the periodicity in the photometric variability of HD 166 is coincident with the rotation period.^[20] This leads to its classification as a BY Draconis variable, where brightness variations are caused by the presence of large starspots on the surface and by chromospheric activity. References 1. ^¹²³⁴{{Cite DR2\|2860924621205256704}} 2. ^Autostar Suite Astronomer Edition. CD-ROM. Meade, April 2006. 3. ^¹{{citation \| display-authors=1 \| last1=Holmberg \| first1=J. \| last2=Nordström \| first2=B. \| last3=Andersen \| first3=J. \| title=The Geneva-Copenhagen survey of the solar neighbourhood. III. Improved distances, ages, and kinematics \| volume=501 \| issue=3 \|date=July 2009 \| pages=941–947 \| journal=Astronomy and Astrophysics \| doi=10.1051/0004-6361/200811191 \| bibcode=2009A&A...501..941H \| arxiv=0811.3982 \| postscript=. }} 4. ^¹{{citation \| last1=Micela \| first1=G. \| last2=Favata \| first2=F. \| last3=Sciortino \| first3=S. \| title=HIPPARCOS distances of X-ray selected stars: implications on their nature as stellar population \| journal=Astronomy and Astrophysics \| volume=326 \| pages=221–227 \|date=October 1997 \| bibcode=1997A&A...326..221M }} 5. ^¹²³{{cite journal \| author=Gaidos \| display-authors=etal \| title=Spectroscopy and Photometry of Nearby Young Solar Analogs \| journal=The Astronomical Journal \| volume=120 \| issue=2 \| year=2000 \| pages=1006–1013 \| doi=10.1086/301488 \| bibcode=2000AJ....120.1006G\| citeseerx=10.1.1.43.4478 }} 6. ^¹²³⁴⁵⁶{{citation \| last1 = Boyajian \| first1 = Tabetha S. \| last2 = von Braun \| first2 = Kaspar \| last3 = van Belle \| first3 = Gerard \| last4 = Farrington \| first4 = Chris \| last5 = Schaefer \| first5 = Gail \| last6 = Jones \| first6 = Jeremy \| last7 = White \| first7 = Russel \| last8 = McAlister \| first8 = Harold A. \| last9 = ten Brummelaar \| first9 = Theo A. \| last10 = Ridgway \| first10 = Stephen \| last11 = Gies \| first11 = Douglas \| last12 = Sturmann \| first12 = Laszlo \| last13 = Sturmann \| first13 = Judit \| last14 = Turner \| first14 = Nils H. \| last15 = Goldfinger \| first15 = P. J. \| last16 = Vargas \| first16 = Norm \| display-authors = 1 \| title = Stellar Diameters and Temperatures. III. Main-sequence A, F, G, and K Stars: Additional High-precision Measurements and Empirical Relations \| journal = The Astrophysical Journal \| volume = 771 \| issue = 1 \| page = 40 \|date=July 2013 \| arxiv = 1306.2974 \| doi = 10.1088/0004-637X/771/1/40 \| bibcode = 2013ApJ...771...40B \| postscript = .}} 7. ^¹{{cite journal \| display-authors=1 \| last1=Eiroa \| first1=C. \| last2=Marshall \| first2=J. P. \| last3=Mora \| first3=A. \| last4=Montesinos \| first4=B. \| last5=Absil \| first5=O. \| last6=Augereau \| first6=J. Ch. \| last7=Bayo \| first7=A. \| last8=Bryden \| first8=G. \| last9=Danchi \| first9=W. \| last10=del Burgo \| first10=C. \| last11=Ertel \| first11=S. \| last12=Fridlund \| first12=M. \| last13=Heras \| first13=A. M. \| last14=Krivov \| first14=A. V. \| last15=Launhardt \| first15=R. \| last16=Liseau \| first16=R. \| last17=Löhne \| first17=T. \| last18=Maldonado \| first18=J. \| last19=Pilbratt \| first19=G. L. \| last20=Roberge \| first20=A. \| last21=Rodmann \| first21=J. \| last22=Sanz-Forcada \| first22=J. \| last23=Solano \| first23=E. \| last24=Stapelfeldt \| first24=K. \| last25=Thébault \| first25=P. \| last26=Wolf \| first26=S. \| last27=Ardila \| first27=D. \| last28=Arévalo \| first28=M. \| last29=Beichmann \| first29=C. \| last30=Faramaz \| first30=V. \| last31=González-García \| first31=B. M. \| last32=Gutiérrez \| first32=R. \| last33=Lebreton \| first33=J. \| last34=Martínez-Arnáiz \| first34=R. \| last35=Meeus \| first35=G. \| last36=Montes \| first36=D. \| last37=Olofsson \| first37=G. \| last38=Su \| first38=K. Y. L. \| last39=White \| first39=G. J. \| last40=Barrado \| first40=D. \| last41=Fukagawa \| first41=M. \| last42=Grün \| first42=E. \| last43=Kamp \| first43=I. \| last44=Lorente \| first44=R. \| last45=Morbidelli \| first45=A. \| last46=Müller \| first46=S. \| last47=Mutschke \| first47=H. \| last48=Nakagawa \| first48=T. \| last49=Ribas \| first49=I. \| last50=Walker \| first50=H. \| title=DUst around NEarby Stars. The survey observational results \| journal=Astronomy & Astrophysics \| volume=555 \| page=A11 \| date=July 2013 \| doi=10.1051/0004-6361/201321050 \| bibcode=2013A&A...555A..11E \| arxiv=1305.0155}} 8. ^¹²{{citation \| last1=Mermilliod \| first1=J.-C. \| title=Compilation of Eggen's UBV data, transformed to UBV (unpublished) \| journal=Catalogue of Eggen's UBV Data. SIMBAD \| pages=0 \| date=1986 \| bibcode=1986EgUBV........0M}} 9. ^¹²³⁴{{cite journal \| bibcode=2006ApJ...643.1160L\| title=The Nearest Young Moving Groups\| journal=The Astrophysical Journal\| volume=643\| issue=2\| pages=1160\| last1=López-Santiago\| first1=J.\| last2=Montes\| first2=D.\| last3=Crespo-Chacón\| first3=I.\| last4=Fernández-Figueroa\| first4=M. J.\| year=2006}} 10. ^¹²³⁴⁵⁶{{cite journal \| bibcode=2017MNRAS.472.1736R\| title=The fundamental stellar parameters of FGK stars in the SEEDS survey Norman, OK 73071, USA\| journal=Monthly Notices of the Royal Astronomical Society\| volume=472\| issue=2\| pages=1736\| last1=Rich\| first1=Evan A.\| last2=Wisniewski\| first2=John P.\| last3=McElwain\| first3=Michael W.\| last4=Hashimoto\| first4=Jun\| last5=Kudo\| first5=Tomoyuki\| last6=Kusakabe\| first6=Nobuhiko\| last7=Okamoto\| first7=Yoshiko K.\| last8=Abe\| first8=Lyu\| last9=Akiyama\| first9=Eiji\| last10=Brandner\| first10=Wolfgang\| last11=Brandt\| first11=Timothy D.\| last12=Cargile\| first12=Phillip\| last13=Carson\| first13=Joseph C.\| last14=Currie\| first14=Thayne M.\| last15=Egner\| first15=Sebastian\| last16=Feldt\| first16=Markus\| last17=Fukagawa\| first17=Misato\| last18=Goto\| first18=Miwa\| last19=Grady\| first19=Carol A.\| last20=Guyon\| first20=Olivier\| last21=Hayano\| first21=Yutaka\| last22=Hayashi\| first22=Masahiko\| last23=Hayashi\| first23=Saeko S.\| last24=Hebb\| first24=Leslie\| last25=Hełminiak\| first25=Krzysztof G.\| last26=Henning\| first26=Thomas\| last27=Hodapp\| first27=Klaus W.\| last28=Ishii\| first28=Miki\| last29=Iye\| first29=Masanori\| last30=Janson\| first30=Markus\| displayauthors=29\| year=2017}} ^[3]^[4]^[5]^[6]^[7]^[8]^[9]^[10] }} External links Image HD 166 [https://web.archive.org/web/20060905173504/http://nstars.nau.edu/index.cfm?fuseaction=singleSearch.systemID&SystemID=0006p2901 nstars.nau.edu]{{dead link\|date=November 2018}} {{clear}}{{Stars of Andromeda}} 12 : Andromeda (constellation)\|BY Draconis variables\|Henry Draper Catalogue objects\|Spectroscopic binaries\|K-type main-sequence stars\|Solar-type stars\|Objects with variable star designations\|HR objects\|Hipparcos objects\|Durchmusterung objects\|Gliese and GJ objects\|Emission-line stars
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Star characteristics

Variability

References

External links