Iota1 Cygni: Difference between revisions

Iota¹ Cygni
Observation data; Epoch J2000 Equinox J2000
Constellation	Cygnus
Right ascension	19h 27m 25.96022s
Declination	52° 19′ 13.5871″
Apparent magnitude (V)	5.73
Characteristics
Evolutionary stage	main sequence
Spectral type	A1V
B−V color index	−0.002±0.002
Astrometry
Radial velocity (Rv)	+1.90 km/s
Proper motion (μ)	RA: -12.639 mas/yr ; Dec.: -27.567 mas/yr
Parallax (π)	8.4332 ± 0.0867 mas
Distance	387 ± 4 ly ; (119 ± 1 pc)
Absolute magnitude (MV)	+0.57
Details
Mass	2.59±0.03 M☉
Luminosity	74.1+11.0; −20.5 L☉
Surface gravity (log g)	4.18 cgs
Temperature	9,683+89; −178 K
Rotational velocity (v sin i)	51.6±2.2 km/s
Age	404 Myr
Other designations
	ι1 Cyg, 7 Cygni, BD+52° 2434, HD 183534, HIP 95656, HR 7408, SAO 31673
Database references
SIMBAD	data

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Iota¹ Cygni, Latinized from ι¹ Cygni, is a probable binary star^[6] system in the northern constellation Cygnus, and is separated by less than a degree from its brighter visual neighbor, Iota² Cygni.^[9] It is near the lower limit of visibility to the naked eye with an apparent visual magnitude of 5.75.^[8] The system is located approximately 387 light years away based on parallax,^[1] and it is drifting further away with a radial velocity of +2 km/s.^[5]

This is a candidate double-lined spectroscopic binary system.^[6] It has a stellar classification of A1V,^[4] suggesting the primary component is an A-type main-sequence star. The star is about 400^[7] million years old with a moderate rotation rate, showing a projected rotational velocity of 52 km/s.^[6] It has 2.6^[3] times the mass of the Sun and is radiating 74^[6] times the Sun's luminosity from its photosphere at an effective temperature of 9,683 K.^[3]

References

^ ^a ^b ^c ^d ^e ^f 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.
^ ^a ^b ^c Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters, 38 (5): 331, arXiv:1108.4971, Bibcode:2012AstL...38..331A, doi:10.1134/S1063773712050015, S2CID 119257644.
^ ^a ^b ^c ^d ^e Zorec, J.; Royer, F. (2012), "Rotational velocities of A-type stars. IV. Evolution of rotational velocities", Astronomy & Astrophysics, 537: A120, arXiv:1201.2052, Bibcode:2012A&A...537A.120Z, doi:10.1051/0004-6361/201117691, S2CID 55586789.
^ ^a ^b Jaschek, M. (July 1978), "Catalogue of selected spectral types in the MK system", Bulletin d'Information du Centre de Données Stellaires, 15 (121): 121, Bibcode:1978BICDS..15..121J. Vizier catalog entry
^ ^a ^b Evans, D. S. (June 20–24, 1966), "The Revision of the General Catalogue of Radial Velocities", in Batten, Alan Henry; Heard, John Frederick (eds.), Determination of Radial Velocities and their Applications, Proceedings from IAU Symposium no. 30, vol. 30, University of Toronto: International Astronomical Union, p. 57, Bibcode:1967IAUS...30...57E.
^ ^a ^b ^c ^d ^e ^f ^g Royer, F.; et al. (February 2014), "Normal A0-A1 stars with low rotational velocities. I. Abundance determination and classification", Astronomy & Astrophysics, 562: 21, arXiv:1401.2372, Bibcode:2014A&A...562A..84R, doi:10.1051/0004-6361/201322762, S2CID 54511685, A84.
^ ^a ^b Gontcharov, G. A. (November 2012), "Spatial distribution and kinematics of OB stars", Astronomy Letters, 38 (11): 694–706, arXiv:1606.09028, Bibcode:2012AstL...38..694G, doi:10.1134/S1063773712110035, S2CID 119108982.
^ ^a ^b "iot01 Cyg". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2016-04-10.
^ Kaler, James B. (September 11, 2015), "Kappa, Iota, and Iota-1 Cygni, a three-for-one-special", Stars, retrieved 2019-09-10.

[GaiaDR2-1] ^ ^a ^b ^c ^d ^e ^f 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.

[Anderson2012-2] Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters, 38 (5): 331, arXiv:1108.4971, Bibcode:2012AstL...38..331A, doi:10.1134/S1063773712050015, S2CID 119257644.

[zorec2012-3] Zorec, J.; Royer, F. (2012), "Rotational velocities of A-type stars. IV. Evolution of rotational velocities", Astronomy & Astrophysics, 537: A120, arXiv:1201.2052, Bibcode:2012A&A...537A.120Z, doi:10.1051/0004-6361/201117691, S2CID 55586789.

[Jaschek1978-4] Jaschek, M. (July 1978), "Catalogue of selected spectral types in the MK system", Bulletin d'Information du Centre de Données Stellaires, 15 (121): 121, Bibcode:1978BICDS..15..121J. Vizier catalog entry

[Evans1967-5] Evans, D. S. (June 20–24, 1966), "The Revision of the General Catalogue of Radial Velocities", in Batten, Alan Henry; Heard, John Frederick (eds.), Determination of Radial Velocities and their Applications, Proceedings from IAU Symposium no. 30, vol. 30, University of Toronto: International Astronomical Union, p. 57, Bibcode:1967IAUS...30...57E.

[Royer2014-6] ^ ^a ^b ^c ^d ^e ^f ^g Royer, F.; et al. (February 2014), "Normal A0-A1 stars with low rotational velocities. I. Abundance determination and classification", Astronomy & Astrophysics, 562: 21, arXiv:1401.2372, Bibcode:2014A&A...562A..84R, doi:10.1051/0004-6361/201322762, S2CID 54511685, A84.

[Gontcharov2012-7] Gontcharov, G. A. (November 2012), "Spatial distribution and kinematics of OB stars", Astronomy Letters, 38 (11): 694–706, arXiv:1606.09028, Bibcode:2012AstL...38..694G, doi:10.1134/S1063773712110035, S2CID 119108982.

[SIMBAD-8] "iot01 Cyg". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2016-04-10.

[Kaler2015-9] Kaler, James B. (September 11, 2015), "Kappa, Iota, and Iota-1 Cygni, a three-for-one-special", Stars, retrieved 2019-09-10.

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@@ Line 1: / Line 1: @@
+{{short description|Binary star system in the constellation Cygnus}}
 {{DISPLAYTITLE:Iota<sup>1</sup> Cygni}}
 {{other stars by Bayer designation|Iota Cygni{{!}}ι Cygni}}
@@ Line 38: / Line 39: @@
 }}
 {{Starbox catalog
- | names = {{odlist | B=ι<sup>1</sup> Cyg | F=7&nbsp;Cygni | BD=+52°&nbsp;2434 | HD=183534 | HIP=95656 | HR=7408 | Mac=n'Cheese | SAO=31673 }}<ref name=SIMBAD/>
+ | names = {{odlist | B=ι<sup>1</sup> Cyg | F=7&nbsp;Cygni | BD=+52°&nbsp;2434 | HD=183534 | HIP=95656 | HR=7408 | SAO=31673 }}<ref name=SIMBAD/>
 }}
 {{Starbox reference
@@ Line 52: / Line 53: @@
 {{reflist|refs=
-<ref name=SIMBAD>{{cite simbad | title=iot01 Cyg | accessdate=2016-04-10 }}</ref>
+<ref name=SIMBAD>{{cite simbad | title=iot01 Cyg | access-date=2016-04-10 }}</ref>
 <ref name=GaiaDR2>{{cite DR2|2136367795901179136}}</ref>
@@ Line 62: / Line 63: @@
  | volume=38 | issue=11 | pages=694–706 | date=November 2012
  | doi=10.1134/S1063773712110035 | bibcode=2012AstL...38..694G
- | arxiv=1606.09028 | postscript=. }}</ref>
+ | arxiv=1606.09028 | s2cid=119108982 | postscript=. }}</ref>
 <ref name=Royer2014>{{citation
@@ Line 74: / Line 75: @@
  | volume=562 | id=A84 | pages=21 | date=February 2014
  | doi=10.1051/0004-6361/201322762 | postscript=.
- | bibcode=2014A&A...562A..84R | arxiv=1401.2372 }}</ref>
+ | bibcode=2014A&A...562A..84R | arxiv=1401.2372 | s2cid=54511685 }}</ref>
 <ref name=zorec2012>{{citation
@@ Line 82: / Line 83: @@
  | volume=537 | pages=A120 | year=2012
  | bibcode=2012A&A...537A.120Z | arxiv=1201.2052
- | doi=10.1051/0004-6361/201117691 | postscript=. }}</ref>
+ | doi=10.1051/0004-6361/201117691 | s2cid=55586789 | postscript=. }}</ref>
 <ref name=Jaschek1978>{{citation
  | last1=Jaschek | first1=M.
  | title=Catalogue of selected spectral types in the MK system
- | journal=Bulletin d'Information du Centre de Donnees Stellaires
+ | journal=Bulletin d'Information du Centre de Données Stellaires
  | volume=15 | issue=121 |date=July 1978
+ | page=121
  | bibcode=1978BICDS..15..121J | postscript=.
 }} [http://vizier.u-strasbg.fr/viz-bin/VizieR-4?-source=III/42/catalog&Name=183534 Vizier catalog entry]</ref>
@@ Line 98: / Line 100: @@
  | contribution=The Revision of the General Catalogue of Radial Velocities
  | title=Determination of Radial Velocities and their Applications, Proceedings from IAU Symposium no. 30
- | location=University of Toronto | postscript=.
+ | volume=30 | page=57 | location=University of Toronto | postscript=.
  | publisher=[[International Astronomical Union]]
  | bibcode=1967IAUS...30...57E }}</ref>
@@ Line 108: / Line 110: @@
  | issue=5 | pages=331 | year=2012
  | bibcode=2012AstL...38..331A | arxiv=1108.4971
- | doi=10.1134/S1063773712050015 | postscript=. }}</ref>
+ | doi=10.1134/S1063773712050015 | s2cid=119257644 | postscript=. }}</ref>
 <ref name=Kaler2015>{{citation
@@ Line 114: / Line 116: @@
  | title=Kappa, Iota, and Iota-1 Cygni, a three-for-one-special | work=Stars
  | url=http://stars.astro.illinois.edu/sow/kappacyg.html
- | accessdate=2019-09-10 | postscript=. }}</ref>
+ | access-date=2019-09-10 | postscript=. }}</ref>
 }}
@@ Line 120: / Line 122: @@
 {{Stars of Cygnus}}
 <!-- Properties -->
 [[Category:A-type main-sequence stars]]
 [[Category:Spectroscopic binaries]]
@@ Line 129: / Line 132: @@
 [[Category:Henry Draper Catalogue objects|183534]]
 [[Category:Hipparcos objects|095656]]
-[[Category:HR objects|7408]]
+[[Category:Bright Star Catalogue objects|7408]]

Observation data Epoch J2000 Equinox J2000
Constellation	Cygnus
Right ascension	19^h 27^m 25.96022^s^[1]
Declination	52° 19′ 13.5871″^[1]
Apparent magnitude (V)	5.73^[2]
Characteristics
Evolutionary stage	main sequence^[3]
Spectral type	A1V^[4]
B−V color index	−0.002±0.002^[2]
Astrometry

Radial velocity (R_v)	+1.90^[5] km/s
Proper motion (μ)	RA: -12.639^[1] mas/yr Dec.: -27.567^[1] mas/yr
Parallax (π)	8.4332 ± 0.0867 mas^[1]
Distance	387 ± 4 ly (119 ± 1 pc)
Absolute magnitude (M_V)	+0.57^[2]

Details

Mass	2.59±0.03^[3] `M`_☉
Luminosity	74.1+11.0 −20.5^[6] `L`_☉
Surface gravity (log g)	4.18^[6] cgs
Temperature	9,683+89 −178^[3] K
Rotational velocity (v sin i)	51.6±2.2^[6] km/s
Age	404^[7] Myr

Other designations
ι¹ Cyg, 7 Cygni, BD+52° 2434, HD 183534, HIP 95656, HR 7408, SAO 31673^[8]
Database references
SIMBAD	data