“Gamma Pegasi”的意思、由来-开放百科全书

Gamma Pegasi is the star's Bayer designation. Although it also had the traditional name Algenib, this name was also used for Alpha Persei. In 2016, the International Astronomical Union organized a Working Group on Star Names (WGSN)^[2] to catalog and standardize proper names for stars. The WGSN's first bulletin of July 2016^[3] included a table of the first two batches of names approved by the WGSN; which included Algenib for this star (Alpha Persei was given the name Mirfak).

The asterism of γ Pegasi and α Andromedae, in Hindu astronomy, is called Uttara Bhādrapadā (उत्तरभाद्रपदा) or Uttṛṭṭāti. It is the 26th nakshatra. In Chinese, {{lang|zh|壁宿}} ({{lang|zh-Latn|Bìxiù}}), meaning Wall (asterism) refers to an asterism consisting of γ Pegasi and α Andromedae .^[4] Consequently, γ Pegasi itself is known as {{lang|zh|壁宿一}} ({{lang|zh-Latn|Bìxiù yī}}, {{lang-en|the First Star of Wall}}.)^[5]

Properties

In 1911, American astronomer Keivin Burns discovered that the radial velocity of Gamma Pegasi varied slightly. This was confirmed in 1953 by American astronomer D. Harold McNamara, who identified it as a Beta Cephei variable.^[7] (At the time he actually identified it as a Beta Canis Majoris star, which was subsequently designated a Beta Cephei variable.)^[30] It has a radial pulsation period of 0.15175 days (3.642 hours), but also shows the behavior of a slowly pulsating B star (SPB) with three additional pulsational frequencies.^[7] Its magnitude varies between +2.78 and +2.89 over the course of each pulsation cycle.

This is a large star with almost nine^[4] times the mass of the Sun and close to five^[14] times the Sun's radius. The stellar classification of B2 IV^[4] suggests this is a subgiant star that is exhausting the hydrogen at its core and is in the process of evolving away from the main sequence. It is either rotating very slowly with no measurable rotational velocity or else it is being viewed from nearly pole-on.^[20] Gamma Pegasi has a total luminosity of 5,840 times that of the Sun,^[18] which is being radiated from its outer atmosphere at an effective temperature of more than 21,000 K.^[14] At this temperature, the star glows with a blue-white hue.^[38]

Despite claims that the star has a magnetic field (Butkovskaya & Plachinda [2007]), this didn't hold up under further observation. Neiner et al. (2014) put an upper bound on a dipolar magnetic field strength of about {{Val|40|ul=G}}.^[39]

References

1. ^{{cite web | url=http://www.pas.rochester.edu/~emamajek/WGSN/IAU-CSN.txt | title=IAU Catalog of Star Names |accessdate=28 July 2016}}
2. ^{{cite web | url=https://www.iau.org/science/scientific_bodies/working_groups/280/ | title=IAU Working Group on Star Names (WGSN)|accessdate=22 May 2016}}
3. ^{{cite web | url=http://www.pas.rochester.edu/~emamajek/WGSN/WGSN_bulletin1.pdf | title=Bulletin of the IAU Working Group on Star Names, No. 1 |accessdate=28 July 2016}}
4. ^{{zh icon}} p. 170, 中國星座神話, written by 陳久金. Published by 台灣書房出版有限公司, 2005, {{ISBN|978-986-7332-25-7}}.
5. ^{{zh icon}} 香港太空館 – 研究資源 – 亮星中英對照表 {{webarchive |url=https://web.archive.org/web/20081025110153/http://www.lcsd.gov.hk/CE/Museum/Space/Research/StarName/c_research_chinengstars_ala_alz.htm |date=October 25, 2008 }}, Hong Kong Space Museum. Accessed on line November 23, 2010.
6. ^¹²³⁴⁵{{citation | last1=Fitzpatrick | first1=E. L. | last2=Massa | first2=D. | title=Determining the Physical Properties of the B Stars. II. Calibration of Synthetic Photometry | journal=The Astronomical Journal | volume=129 | issue=3 | pages=1642–1662 |date=March 2005 | doi=10.1086/427855 | bibcode=2005AJ....129.1642F |arxiv = astro-ph/0412542 }}
7. ^¹²³⁴⁵{{citation | last1=Tetzlaff | first1=N. | last2=Neuhäuser | first2=R. | last3=Hohle | first3=M. M. | title=A catalogue of young runaway Hipparcos stars within 3 kpc from the Sun | journal=Monthly Notices of the Royal Astronomical Society | volume=410 | issue=1 | pages=190–200 |date=January 2011 | doi=10.1111/j.1365-2966.2010.17434.x | bibcode=2011MNRAS.410..190T |arxiv = 1007.4883 }}
8. ^¹{{citation | last1=Gies | first1=Douglas R. | last2=Lambert | first2=David L. | title=Carbon, nitrogen, and oxygen abundances in early B-type stars | journal=Astrophysical Journal, Part 1 | volume=387 | date=March 10, 1992 | pages=673–700 | doi=10.1086/171116 | bibcode=1992ApJ...387..673G }}
9. ^¹{{citation | last=Wilson | first=Ralph Elmer | date=1953 | title=General Catalogue of Stellar Radial Velocities | publisher=Carnegie Institution of Washington | location=Washington | bibcode=1953GCRV..C......0W }}
10. ^¹²{{citation | last1=Abt | first1=Helmut A. | last2=Levato | first2=Hugo | last3=Grosso | first3=Monica | title=Rotational Velocities of B Stars | journal=The Astrophysical Journal | volume=573 | issue=1 | pages=359–365 |date=July 2002 | doi=10.1086/340590 | bibcode=2002ApJ...573..359A }}. The zero value is for {{nowrap|v sin i}}, so v and/or i must be small.
11. ^¹²³⁴{{citation | last1=Crawford | first1=D. L. | last2=Barnes | first2=J. V. | last3=Golson | first3=J. C. | title=Four-color, H-beta, and UBV photometry for bright B-type stars in the northern hemisphere | journal=The Astronomical Journal | date=1971 | pages=1058 | volume=76 | bibcode=1971AJ.....76.1058C | doi=10.1086/111220 }}
12. ^¹{{cite simbad | title=gam Peg | accessdate=2012-02-23 }}
13. ^¹²³{{citation | last1=Walczak | first1=P. | last2=Daszyńska-Daszkiewicz | first2=J. | title=Complex asteroseismology of the hybrid B-type pulsator γ Pegasi: A test of stellar opacities | journal=Astronomische Nachrichten | volume=331 | issue=9/10 | pages=1057–1060 |date=December 2010 | doi=10.1002/asna.201011456 | bibcode=2010AN....331.1057W |arxiv = 1004.2366 }}
14. ^¹{{citation | last1=McNamara | first1=D. H. | title=Gamma Pegasi: A Beta Canis Majoris Star of Small Velocity Amplitude | journal=Publications of the Astronomical Society of the Pacific | volume=65 | issue=384 | page=144 |date=June 1953 | doi=10.1086/126561 | bibcode=1953PASP...65..144M }}
15. ^¹²{{citation | last1=Hohle | first1=M. M. | last2=Neuhäuser | first2=R. | last3=Schutz | first3=B. F. | title=Masses and luminosities of O- and B-type stars and red supergiants | journal=Astronomische Nachrichten | volume=331 | issue=4 | page=349 |date=April 2010 | doi=10.1002/asna.200911355 | bibcode=2010AN....331..349H |arxiv = 1003.2335 }}
16. ^¹{{citation |title=The Colour of Stars |date=December 21, 2004 |work=Australia Telescope, Outreach and Education |publisher=Commonwealth Scientific and Industrial Research Organisation |url=http://outreach.atnf.csiro.au/education/senior/astrophysics/photometry_colour.html |accessdate=2012-01-16 |deadurl=yes |archiveurl=https://www.webcitation.org/6630AbtJZ?url=http://outreach.atnf.csiro.au/education/senior/astrophysics/photometry_colour.html |archivedate=2012-03-10 |df= }}
17. ^¹{{citation | title=γ Pegasi: testing Vega-like magnetic fields in B stars | display-authors=1 | last1=Neiner | first1=C. | last2=Monin | first2=D. | last3=Leroy | first3=B. | last4=Mathis | first4=S. | last5=Bohlender | first5=D. | journal=Astronomy & Astrophysics | volume=562 | id=A59 | pages=8 | date=February 2014 | doi=10.1051/0004-6361/201323093 | bibcode=2014A&A...562A..59N | arxiv=1312.3521 | postscript=. | url=https://hal-cea.archives-ouvertes.fr/cea-01162433}}
18. ^¹{{citation | display-authors=1 | author1=Huang | first1=W. | last2=Wallerstein | first2=G. | last3=Stone | first3=M. | title=A catalogue of Paschen-line profiles in standard stars | journal=Astronomy & Astrophysics | volume=547 | pages=A62 | year=2012 | bibcode=2012A&A...547A..62H | arxiv=1210.7893 | doi=10.1051/0004-6361/201219804 | postscript=. }}

词条	Gamma Pegasi
释义	Nomenclature Properties References External links {{Starbox begin \| name = Gamma Pegasi }}{{Starbox image \| image={{Location mark \|image=Pegasus constellation map.svg\|alt=\|float=center\|width=280 \|label=\|position=right \|mark=Red circle.svg\|mark_width=12\|mark_link=γ Peg \|x=94\|y=508 }} \|caption=Location of γ Pegasi (circled) }}{{Starbox observe \| epoch = J2000 \| constell = Pegasus \| ra = {{RA\|00\|13\|14.15123}} \| dec = {{DEC\|+15\|11\|00.9368}} \| appmag_v = +2.84^[3] }}{{Starbox character \| class = B2 IV^[4] \| b-v = –0.23^[3] \| u-b = –0.85^[3] \| variable = β Cep^[7] }}{{Starbox astrometry \| radial_v = +4.1^[8] \| prop_mo_ra = +1.98 \| prop_mo_dec = –9.28 \| parallax = 8.33 \| p_error = 0.53 \| parallax_footnote = \| absmag_v = −2.64^[12] }}{{Starbox detail \| mass = {{nowrap\|8.9 ± 0.1}}^[4] \| radius = {{nowrap\|4.80 ± 0.39}}^[14] \| gravity = {{nowrap\|3.98 ± 0.06}}^[14] \| metal_fe = –0.34^[16] \| age_myr = {{nowrap\|18.7 ± 3.2}}^[4] \| luminosity = 5,840^[18] \| temperature = {{nowrap\|21,179 ± 237}}^[14] \| rotational_velocity = 0^[20] }}{{Starbox catalog \| names = Algeneb,{{cn\|date=January 2019}} Algenib, 88 Peg, HD 886, FK5 7, HIP 1067, HR 39, SAO 91781.^[21] }}{{Starbox reference \| Simbad = gam+Peg }}{{Starbox end}}Gamma Pegasi (γ Pegasi, abbreviated Gamma Peg or γ Peg), also named Algenib,^[1] is a star in the constellation of Pegasus, located at the southeast corner of the asterism known as the Great Square. The average apparent visual magnitude of +2.84^[3] puts this at fourth place among the brightest stars in the constellation. The distance to this star has been measured using the parallax technique, yielding a value of roughly {{Convert\|390\|ly\|pc\|abbr=off\|lk=on}} with a margin of error of 5%. Nomenclature Gamma Pegasi is the star's Bayer designation. Although it also had the traditional name Algenib, this name was also used for Alpha Persei. In 2016, the International Astronomical Union organized a Working Group on Star Names (WGSN)^[2] to catalog and standardize proper names for stars. The WGSN's first bulletin of July 2016^[3] included a table of the first two batches of names approved by the WGSN; which included Algenib for this star (Alpha Persei was given the name Mirfak). The asterism of γ Pegasi and α Andromedae, in Hindu astronomy, is called Uttara Bhādrapadā (उत्तरभाद्रपदा) or Uttṛṭṭāti. It is the 26th nakshatra. In Chinese, {{lang\|zh\|壁宿}} ({{lang\|zh-Latn\|Bìxiù}}), meaning Wall (asterism) refers to an asterism consisting of γ Pegasi and α Andromedae .^[4] Consequently, γ Pegasi itself is known as {{lang\|zh\|壁宿一}} ({{lang\|zh-Latn\|Bìxiù yī}}, {{lang-en\|the First Star of Wall}}.)^[5] Properties In 1911, American astronomer Keivin Burns discovered that the radial velocity of Gamma Pegasi varied slightly. This was confirmed in 1953 by American astronomer D. Harold McNamara, who identified it as a Beta Cephei variable.^[7] (At the time he actually identified it as a Beta Canis Majoris star, which was subsequently designated a Beta Cephei variable.)^[30] It has a radial pulsation period of 0.15175 days (3.642 hours), but also shows the behavior of a slowly pulsating B star (SPB) with three additional pulsational frequencies.^[7] Its magnitude varies between +2.78 and +2.89 over the course of each pulsation cycle. This is a large star with almost nine^[4] times the mass of the Sun and close to five^[14] times the Sun's radius. The stellar classification of B2 IV^[4] suggests this is a subgiant star that is exhausting the hydrogen at its core and is in the process of evolving away from the main sequence. It is either rotating very slowly with no measurable rotational velocity or else it is being viewed from nearly pole-on.^[20] Gamma Pegasi has a total luminosity of 5,840 times that of the Sun,^[18] which is being radiated from its outer atmosphere at an effective temperature of more than 21,000 K.^[14] At this temperature, the star glows with a blue-white hue.^[38] Despite claims that the star has a magnetic field (Butkovskaya & Plachinda [2007]), this didn't hold up under further observation. Neiner et al. (2014) put an upper bound on a dipolar magnetic field strength of about {{Val\|40\|ul=G}}.^[39] References 1. ^{{cite web \| url=http://www.pas.rochester.edu/~emamajek/WGSN/IAU-CSN.txt \| title=IAU Catalog of Star Names \|accessdate=28 July 2016}} 2. ^{{cite web \| url=https://www.iau.org/science/scientific_bodies/working_groups/280/ \| title=IAU Working Group on Star Names (WGSN)\|accessdate=22 May 2016}} 3. ^{{cite web \| url=http://www.pas.rochester.edu/~emamajek/WGSN/WGSN_bulletin1.pdf \| title=Bulletin of the IAU Working Group on Star Names, No. 1 \|accessdate=28 July 2016}} 4. ^{{zh icon}} p. 170, 中國星座神話, written by 陳久金. Published by 台灣書房出版有限公司, 2005, {{ISBN\|978-986-7332-25-7}}. 5. ^{{zh icon}} 香港太空館 – 研究資源 – 亮星中英對照表 {{webarchive \|url=https://web.archive.org/web/20081025110153/http://www.lcsd.gov.hk/CE/Museum/Space/Research/StarName/c_research_chinengstars_ala_alz.htm \|date=October 25, 2008 }}, Hong Kong Space Museum. Accessed on line November 23, 2010. 6. ^¹²³⁴⁵{{citation \| last1=Fitzpatrick \| first1=E. L. \| last2=Massa \| first2=D. \| title=Determining the Physical Properties of the B Stars. II. Calibration of Synthetic Photometry \| journal=The Astronomical Journal \| volume=129 \| issue=3 \| pages=1642–1662 \|date=March 2005 \| doi=10.1086/427855 \| bibcode=2005AJ....129.1642F \|arxiv = astro-ph/0412542 }} 7. ^¹²³⁴⁵{{citation \| last1=Tetzlaff \| first1=N. \| last2=Neuhäuser \| first2=R. \| last3=Hohle \| first3=M. M. \| title=A catalogue of young runaway Hipparcos stars within 3 kpc from the Sun \| journal=Monthly Notices of the Royal Astronomical Society \| volume=410 \| issue=1 \| pages=190–200 \|date=January 2011 \| doi=10.1111/j.1365-2966.2010.17434.x \| bibcode=2011MNRAS.410..190T \|arxiv = 1007.4883 }} 8. ^¹{{citation \| last1=Gies \| first1=Douglas R. \| last2=Lambert \| first2=David L. \| title=Carbon, nitrogen, and oxygen abundances in early B-type stars \| journal=Astrophysical Journal, Part 1 \| volume=387 \| date=March 10, 1992 \| pages=673–700 \| doi=10.1086/171116 \| bibcode=1992ApJ...387..673G }} 9. ^¹{{citation \| last=Wilson \| first=Ralph Elmer \| date=1953 \| title=General Catalogue of Stellar Radial Velocities \| publisher=Carnegie Institution of Washington \| location=Washington \| bibcode=1953GCRV..C......0W }} 10. ^¹²{{citation \| last1=Abt \| first1=Helmut A. \| last2=Levato \| first2=Hugo \| last3=Grosso \| first3=Monica \| title=Rotational Velocities of B Stars \| journal=The Astrophysical Journal \| volume=573 \| issue=1 \| pages=359–365 \|date=July 2002 \| doi=10.1086/340590 \| bibcode=2002ApJ...573..359A }}. The zero value is for {{nowrap\|v sin i}}, so v and/or i must be small. 11. ^¹²³⁴{{citation \| last1=Crawford \| first1=D. L. \| last2=Barnes \| first2=J. V. \| last3=Golson \| first3=J. C. \| title=Four-color, H-beta, and UBV photometry for bright B-type stars in the northern hemisphere \| journal=The Astronomical Journal \| date=1971 \| pages=1058 \| volume=76 \| bibcode=1971AJ.....76.1058C \| doi=10.1086/111220 }} 12. ^¹{{cite simbad \| title=gam Peg \| accessdate=2012-02-23 }} 13. ^¹²³{{citation \| last1=Walczak \| first1=P. \| last2=Daszyńska-Daszkiewicz \| first2=J. \| title=Complex asteroseismology of the hybrid B-type pulsator γ Pegasi: A test of stellar opacities \| journal=Astronomische Nachrichten \| volume=331 \| issue=9/10 \| pages=1057–1060 \|date=December 2010 \| doi=10.1002/asna.201011456 \| bibcode=2010AN....331.1057W \|arxiv = 1004.2366 }} 14. ^¹{{citation \| last1=McNamara \| first1=D. H. \| title=Gamma Pegasi: A Beta Canis Majoris Star of Small Velocity Amplitude \| journal=Publications of the Astronomical Society of the Pacific \| volume=65 \| issue=384 \| page=144 \|date=June 1953 \| doi=10.1086/126561 \| bibcode=1953PASP...65..144M }} 15. ^¹²{{citation \| last1=Hohle \| first1=M. M. \| last2=Neuhäuser \| first2=R. \| last3=Schutz \| first3=B. F. \| title=Masses and luminosities of O- and B-type stars and red supergiants \| journal=Astronomische Nachrichten \| volume=331 \| issue=4 \| page=349 \|date=April 2010 \| doi=10.1002/asna.200911355 \| bibcode=2010AN....331..349H \|arxiv = 1003.2335 }} 16. ^¹{{citation \|title=The Colour of Stars \|date=December 21, 2004 \|work=Australia Telescope, Outreach and Education \|publisher=Commonwealth Scientific and Industrial Research Organisation \|url=http://outreach.atnf.csiro.au/education/senior/astrophysics/photometry_colour.html \|accessdate=2012-01-16 \|deadurl=yes \|archiveurl=https://www.webcitation.org/6630AbtJZ?url=http://outreach.atnf.csiro.au/education/senior/astrophysics/photometry_colour.html \|archivedate=2012-03-10 \|df= }} 17. ^¹{{citation \| title=γ Pegasi: testing Vega-like magnetic fields in B stars \| display-authors=1 \| last1=Neiner \| first1=C. \| last2=Monin \| first2=D. \| last3=Leroy \| first3=B. \| last4=Mathis \| first4=S. \| last5=Bohlender \| first5=D. \| journal=Astronomy & Astrophysics \| volume=562 \| id=A59 \| pages=8 \| date=February 2014 \| doi=10.1051/0004-6361/201323093 \| bibcode=2014A&A...562A..59N \| arxiv=1312.3521 \| postscript=. \| url=https://hal-cea.archives-ouvertes.fr/cea-01162433}} 18. ^¹{{citation \| display-authors=1 \| author1=Huang \| first1=W. \| last2=Wallerstein \| first2=G. \| last3=Stone \| first3=M. \| title=A catalogue of Paschen-line profiles in standard stars \| journal=Astronomy & Astrophysics \| volume=547 \| pages=A62 \| year=2012 \| bibcode=2012A&A...547A..62H \| arxiv=1210.7893 \| doi=10.1051/0004-6361/201219804 \| postscript=. }} ^[6]^[7]^[8]^[9]^[10]^[11]^[12]^[13]^[14]^[15]^[16]^[17]^[18] }} External links {{citation \| first1=James B. \| last1=Kaler \| title=ALGENIB (Gamma Pegasi) \| work=Stars \| publisher=University of Illinois \| url=http://stars.astro.illinois.edu/sow/algenib.html \| accessdate=2012-02-24 }} {{Stars of Pegasus}} 10 : Pegasus (constellation)\|Bayer objects\|B-type subgiants\|Beta Cephei variables\|Flamsteed objects\|Hipparcos objects\|HR objects\|Henry Draper Catalogue objects\|Stars with proper names\|Durchmusterung objects
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Nomenclature

Properties

References

External links