Astronomy:HD 197037

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Short description: Binary star system in the constellation of Cygnus
HD 197037
Observation data
{{#ifeq:J2000|J2000.0 (ICRS)|Epoch J2000.0      Equinox J2000.0 (ICRS)| Epoch J2000      [[Astronomy:Equinox (celestial coordinates)|Equinox J2000}}
Constellation Cygnus[1]
A
Right ascension  20h 39m 32.95994s[2]
Declination +42° 14′ 54.7783″[2]
Apparent magnitude (V) 6.813[3]
B
Right ascension  20h 39m 32.93627s[4]
Declination +42° 14′ 51.1696″[4]
Apparent magnitude (V)
Characteristics
HD 197037 A
Evolutionary stage main sequence
Spectral type F7V[5]
HD 197037 B
Spectral type M[6]
Astrometry
A
Radial velocity (Rv)9.087±0.199[2] km/s
Proper motion (μ) RA: −62.745[2] mas/yr
Dec.: −222.168[2] mas/yr
Parallax (π)30.2286 ± 0.0143[2] mas
Distance107.90 ± 0.05 ly
(33.08 ± 0.02 pc)
Absolute magnitude (MV)4.26[1]
B
Proper motion (μ) RA: −54.165[4] mas/yr
Dec.: −227.397[4] mas/yr
Parallax (π)30.3173 ± 0.0339[4] mas
Distance107.6 ± 0.1 ly
(32.98 ± 0.04 pc)
Position (relative to HD 197037 A)[7]
ComponentHD 197037 B
Epoch of observation2013
Angular distance3.676±0.011″
Position angle182.21±0.18°
Observed separation
(projected)		121 AU
Details[5]
HD 197037 A
Mass1.063±0.022 M☉
Radius1.105±0.023 R☉
Luminosity1.568±0.074 L☉
Surface gravity (log g)4.37±0.04 cgs
Temperature6137±20[8] K
Metallicity [Fe/H]−0.16±0.03 dex
Rotation19.1 d[3]
Age3.408±0.924 Gyr
HD 197037 B
Mass0.3412+0.0098−0.0477[7] M☉
Radius0.16[9] R☉
Luminosity0.01[10] L☉
Temperature4,766[9] K
Other designations
BD+41 3845, HIP 101948, LTT 16037, NLTT 49662, TYC 3161-126-1, 2MASS J20393296+4214549[11]
Database references
SIMBADdata

HD 197037 is a binary star system. Its primary or visible star, HD 197037 A, is a F-type main-sequence star. Its surface temperature is 6150±34 K. HD 197037 A is depleted in heavy elements compared to the Sun, with a metallicity Fe/H index of −0.16±0.03, but is younger at an age of 3.408±0.924 billion years.[5]

A multiplicity survey detected a red dwarf stellar companion HD 197037 B in 2016, at a projected separation of 121 AU.[7] The existence of other stellar companions at projected separations from 1.62 to 45.26 AU was excluded.[5]

Planetary system

In 2012 one planet, named HD 197037 Ab, was discovered on a wide, eccentric orbit by the radial velocity method.[12]

Another planet in the system was initially suspected, but the radial velocity signal was later attributed to the stellar companion HD 197037 B.[7]

The HD 197037 A planetary system[12]
Companion
(in order from star) 		Mass Semimajor axis
(AU) 		Orbital period
(days) 		Eccentricity Inclination Radius
b ≥0.79±0.05 MJ 2.07±0.05 1035.7±13 0.22±0.07 — —

References

  1. ↑ 1.0 1.1 Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters 38 (5): 331, doi:10.1134/S1063773712050015, Bibcode: 2012AstL...38..331A 
  2. ↑ 2.0 2.1 2.2 2.3 2.4 2.5 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940  Gaia DR3 record for this source at VizieR.
  3. ↑ 3.0 3.1 France, Kevin; Arulanantham, Nicole; Fossati, Luca; Lanza, Antonino F.; Loyd, R. O. Parke; Redfield, Seth; Schneider, P. Christian (2018), "Far-ultraviolet Activity Levels of F, G, K, and M Dwarf Exoplanet Host Stars", The Astrophysical Journal Supplement Series 239 (1): 16, doi:10.3847/1538-4365/aae1a3, Bibcode: 2018ApJS..239...16F 
  4. ↑ 4.0 4.1 4.2 4.3 4.4 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940  Gaia DR3 record for this source at VizieR.
  5. ↑ 5.0 5.1 5.2 5.3 Wittrock, Justin M.; Kane, Stephen R.; Horch, Elliott P.; Howell, Steve B.; Ciardi, David R.; Everett, Mark E. (2017), "Exclusion of Stellar Companions to Exoplanet Host Stars", The Astronomical Journal 154 (5): 184, doi:10.3847/1538-3881/aa8d69, Bibcode: 2017AJ....154..184W 
  6. ↑ Bowler, Brendan P. (2016), "Imaging Extrasolar Giant Planets", Publications of the Astronomical Society of the Pacific 128 (968), doi:10.1088/1538-3873/128/968/102001, Bibcode: 2016PASP..128j2001B 
  7. ↑ 7.0 7.1 7.2 7.3 Ginski, C.; Mugrauer, M.; Seeliger, M.; Buder, S.; Errmann, R.; Avenhaus, H.; Mouillet, D.; Maire, A.-L. et al. (2016), "A lucky imaging multiplicity study of exoplanet host stars – II", Monthly Notices of the Royal Astronomical Society 457 (2): 2173–2191, doi:10.1093/mnras/stw049, Bibcode: 2016MNRAS.457.2173G 
  8. ↑ Stassun, Keivan G.; Collins, Karen A.; Gaudi, B. Scott (2017), "Accurate Empirical Radii and Masses of Planets and Their Host Stars with Gaia Parallaxes", The Astronomical Journal 153 (3): 136, doi:10.3847/1538-3881/aa5df3, Bibcode: 2017AJ....153..136S 
  9. ↑ 9.0 9.1 Adibekyan, V.; Santos, N. C.; Demangeon, O. D. S.; Faria, J. P.; Barros, S. C. C.; Oshagh, M.; Figueira, P.; Delgado Mena, E. et al. (2021), "Stellar clustering and orbital architecture of planetary systems", Astronomy and Astrophysics 649: A111, doi:10.1051/0004-6361/202040201, Bibcode: 2021A&A...649A.111A 
  10. ↑ Hardegree-Ullman, Kevin K.; Apai, Dániel; Bergsten, Galen J.; Pascucci, Ilaria; López-Morales, Mercedes (2023), "Bioverse: A Comprehensive Assessment of the Capabilities of Extremely Large Telescopes to Probe Earth-like O2 Levels in Nearby Transiting Habitable-zone Exoplanets", The Astronomical Journal 165 (6): 267, doi:10.3847/1538-3881/acd1ec, Bibcode: 2023AJ....165..267H 
  11. ↑ "HD 197037". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+197037. 
  12. ↑ 12.0 12.1 Robertson, Paul; Endl, Michael; Cochran, William D.; MacQueen, Phillip J.; Wittenmyer, Robert A.; Horner, J.; Brugamyer, Erik J.; Simon, Attila E. et al. (2012), "THE McDONALD OBSERVATORY PLANET SEARCH: NEW LONG-PERIOD GIANT PLANETS AND TWO INTERACTING JUPITERS IN THE HD 155358 SYSTEM", The Astrophysical Journal 749 (1): 39, doi:10.1088/0004-637X/749/1/39, Bibcode: 2012ApJ...749...39R 

Coordinates: Sky map 20h 39m 32.9601s, +42° 14′ 54.7736″



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