From Wikipedia, the free encyclopedia
Star in the constellation of Scorpius
N Scorpii , also known as HD 148703 , is a solitary,
[14] bluish-white hued
star located in the southern
constellation
Scorpius . It has an
apparent magnitude of 4.23, making it readily visible to the
naked eye . N Scorpii was initially given the
Bayer designation Alpha Normae by
Lacaille but it was later moved from
Norma to Scorpius.
[15] N Scorpii is currently located 550
light years away based on
parallax measurements from the
Hipparcos satellite and is part of the Upper Scorpius–Centaurus region of the
Scorpius–Centaurus association .
[16]
N Scorpii has been given several
stellar classifications over the years. It has been given the
luminosity class of a
main sequence star (V),
[17] a
subgiant (IV),
[18] an evolved
giant star (III),
[19] or a blend between the last two classes (III-IV).
[3] It is generally classified as either a B2 or B3 star several times hotter than the
Sun . HD 148703 is a candidate
β Cephei variable
[4] and its variability was first noticed in 1983 by C. Sterken.
[20] Further observations were made by Abt et al. (2002) by observing its
projected rotational velocity .
[21] It was identified as a candidate in 2002 in a survey for non-radial pulsations in
B-type stars .
[22]
The object has two generally accepted classes: B2 III-IV and B2 IV. It has 7.8 times the
mass of the Sun
[7] and 6.25 times its
size .
[8] It has a
bolometric luminosity 6,918 times greater than the Sun from its
photosphere at an
effective temperature of 21,877
K .
[9] N Scorpii is estimated to be 22
million years old,
[7] which is twice the average age of the aforementioned association. Like most hot stars, N Scorpii spins rapidly, having a
projected rotational velocity of 70
km/s .
[11]
References
^
a
b
c
d van Leeuwen, Floor (13 August 2007).
"Validation of the new Hipparcos reduction" . Astronomy & Astrophysics . 474 (2): 653–664.
arXiv :
0708.1752 .
Bibcode :
2007A&A...474..653V .
doi :
10.1051/0004-6361:20078357 .
eISSN
1432-0746 .
ISSN
0004-6361 .
Hipparcos record for this source at
VizieR .
^
a
b
c Ducati, J. R. (2002). "VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system". VizieR Online Data Catalog .
Bibcode :
2002yCat.2237....0D .
^
a
b Houk, N. (1982). Michigan Catalogue of Two-dimensional Spectral Types for the HD stars. Volume_3. Declinations −40° to −26° .
Bibcode :
1982mcts.book.....H .
^
a
b Stankov, Anamarija; Handler, Gerald (June 2005).
"Catalog of Galactic β Cephei Stars" . The Astrophysical Journal Supplement Series . 158 (2): 193–216.
arXiv :
astro-ph/0506495 .
Bibcode :
2005ApJS..158..193S .
doi :
10.1086/429408 .
eISSN
1538-4365 .
ISSN
0067-0049 .
^ Gontcharov, G. A. (November 2006). "Pulkovo Compilation of Radial Velocities for 35,495 Hipparcos stars in a common system". Astronomy Letters . 32 (11): 759–771.
arXiv :
1606.08053 .
Bibcode :
2006AstL...32..759G .
doi :
10.1134/S1063773706110065 .
eISSN
1562-6873 .
ISSN
1063-7737 .
S2CID
119231169 .
^ Anderson, E.; Francis, Ch. (May 2012). "XHIP: An extended hipparcos compilation". Astronomy Letters . 38 (5): 331–346.
arXiv :
1108.4971 .
Bibcode :
2012AstL...38..331A .
doi :
10.1134/S1063773712050015 .
eISSN
1562-6873 .
ISSN
1063-7737 .
S2CID
119257644 .
^
a
b
c
d Tetzlaff, N.; Neuhäuser, R.; Hohle, M. M. (October 12, 2010).
"A catalogue of young runaway Hipparcos stars within 3 kpc from the Sun" . Monthly Notices of the Royal Astronomical Society . 410 (1). Oxford University Press (OUP): 190–200.
arXiv :
1007.4883 .
Bibcode :
2011MNRAS.410..190T .
doi :
10.1111/j.1365-2966.2010.17434.x .
ISSN
0035-8711 .
^
a
b Kervella, Pierre; Arenou, Frédéric; Thévenin, Frédéric (2022).
"Stellar and substellar companions from Gaia EDR3" . Astronomy & Astrophysics . 657 : A7.
arXiv :
2109.10912 .
Bibcode :
2022A&A...657A...7K .
doi :
10.1051/0004-6361/202142146 .
eISSN
1432-0746 .
ISSN
0004-6361 .
^
a
b
c
d Sartori, M. J.; Lépine, J. R. D.; Dias, W. S. (June 2003).
"Formation scenarios for the young stellar associations between galactic longitudes l = 280° - 360° " . Astronomy & Astrophysics . 404 (3): 913–926.
arXiv :
astro-ph/0304426 .
Bibcode :
2003A&A...404..913S .
doi :
10.1051/0004-6361:20030581 .
eISSN
1432-0746 .
ISSN
0004-6361 .
^ Anders, F.; et al. (August 2019).
"Photo-astrometric distances, extinctions, and astrophysical parameters for Gaia DR2 stars brighter than G = 18" . Astronomy & Astrophysics . 628 : A94.
arXiv :
1904.11302 .
Bibcode :
2019A&A...628A..94A .
doi :
10.1051/0004-6361/201935765 .
eISSN
1432-0746 .
ISSN
0004-6361 .
^
a
b Brown, A. G. A.; Verschueren, W. (March 1997). "High S/N Echelle spectroscopy in young stellar groups. II. Rotational velocities of early-type stars in SCO OB2". Astronomy & Astrophysics . 319 : 811–838.
arXiv :
astro-ph/9608089 .
Bibcode :
1997A&A...319..811B .
ISSN
0004-6361 .
^ Gould, Benjamin Apthorp (1878). "Uranometria Argentina : brillantez y posicion de las estrellas fijas, hasta la septima magnitud, comprendidas dentro de cien grados del polo austral : con atlas". Resultados del Observatorio Nacional Argentino . 1 .
Bibcode :
1879RNAO....1.....G .
^
"N Scorpii" .
SIMBAD .
Centre de données astronomiques de Strasbourg . Retrieved October 17, 2022 .
^ Eggleton, P. P.; Tokovinin, A. A. (11 September 2008).
"A catalogue of multiplicity among bright stellar systems" . Monthly Notices of the Royal Astronomical Society . 389 (2): 869–879.
arXiv :
0806.2878 .
Bibcode :
2008MNRAS.389..869E .
doi :
10.1111/j.1365-2966.2008.13596.x .
eISSN
1365-2966 .
ISSN
0035-8711 .
^
"Norma Constellation (the Level): Stars, Story, Facts... | Constellation Guide" . www.constellation-guide.com . Retrieved 11 October 2021 .
^ Rizzuto, A. C.; Ireland, M. J.; Robertson, J. G. (18 August 2011).
"Multidimensional Bayesian membership analysis of the Sco OB2 moving group" . Monthly Notices of the Royal Astronomical Society . 416 (4): 3108–3117.
arXiv :
1106.2857 .
Bibcode :
2011MNRAS.416.3108R .
doi :
10.1111/j.1365-2966.2011.19256.x .
ISSN
0035-8711 .
^ de Vaucouleurs, A. (1 August 1957).
"Spectral Types and Luminosities of B, A and F Southern Stars" . Monthly Notices of the Royal Astronomical Society . 117 (4): 449–462.
Bibcode :
1957MNRAS.117..449D .
doi :
10.1093/mnras/117.4.449 .
eISSN
1365-2966 .
ISSN
0035-8711 .
^ Buscombe, W. (1 May 1969).
"Line Strengths for Southern OB stars--II: Observations with Moderate Dispersion" . Monthly Notices of the Royal Astronomical Society . 144 (1): 31–39.
Bibcode :
1969MNRAS.144...31B .
doi :
10.1093/mnras/144.1.31 .
ISSN
0035-8711 .
^ Hiltner, W. A.; Garrison, R. F.; Schild, R. E. (July 1969).
"MK Spectral Types for Bright Southern OB Stars" . The Astrophysical Journal . 157 : 313.
Bibcode :
1969ApJ...157..313H .
doi :
10.1086/150069 .
eISSN
1538-4357 .
ISSN
0004-637X .
^ Sterken, C.; Jerzykiewicz, M. (1983). "Search for beta Cephei stars south of declination -20 II. Photometric and spectrographic observations of early B giants and subgiants - Winter objects". Acta Astronomica . 33 : 89–111.
Bibcode :
1983AcA....33...89S .
ISSN
0001-5237 .
^ Abt, Helmut A.; Levato, Hugo; Grosso, Monica (July 2002).
"Rotational Velocities of B Stars" . The Astrophysical Journal . 573 (1): 359–365.
Bibcode :
2002ApJ...573..359A .
doi :
10.1086/340590 .
ISSN
0004-637X .
^ Schrijvers, C.; Telting, J. H.; De Ridder, J. (2002). A Spectroscopic Search for Non-Radial Pulsations in Early B-Type Stars . Vol. 259. p. 204.
Bibcode :
2002ASPC..259..204S .