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HD 197037

Topic: Astronomy

 From HandWiki - Reading time: 3 min
Short description: Binary star system in the constellation of Cygnus
HD 197037
Observation data
Equinox J2000.0]] (ICRS)
Constellation Cygnus
Right ascension  20h 39m 32.9601s[1]
Declination 42° 14′ 54.7736″[1]
Apparent magnitude (V) 6.813[2]
Characteristics
HD 197037 A
Evolutionary stage main-sequence star
Spectral type F7V[3]
HD 197037 B
Spectral type M[4]
Astrometry
Radial velocity (Rv)9.087±0.199[5] km/s
Proper motion (μ) RA: -62.745[5] mas/yr
Dec.: -222.168[5] mas/yr
Parallax (π)30.2286 ± 0.0143[5] mas
Distance107.90 ± 0.05 ly
(33.08 ± 0.02 pc)
Position (relative to HD 197037 A)[6]
ComponentHD 197037 B
Epoch of observation2013
Angular distance3.676±0.011″
Position angle182.21±0.18°
Observed separation
(projected)		121 AU
Details[3]
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[7] K
Metallicity [Fe/H]−0.16±0.03 dex
Rotation19.1 d[2]
Age3.408±0.924 Gyr
HD 197037 B
Mass0.3412+0.0098−0.0477[6] M☉
Other designations
BD+41 3845, HIP 101948, LTT 16037, NLTT 49662, TYC 3161-126-1, 2MASS J20393296+4214549[1]
HD 197037 A: Gaia EDR3 2066437688140905600[5]
HD 197037 B: Gaia EDR3 2066437688141580928[8]
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.[3]

A multiplicity survey detected a red dwarf stellar companion HD 197037 B in 2016, at a projected separation of 121 AU.[6] The existence of other stellar companions at projected separations from 1.62 to 45.26 AU was excluded.[3]

Planetary system

In 2012 one planet, named HD 197037 Ab, was discovered on a wide, eccentric orbit by the radial velocity method.[9]

Another planet in the system was initially suspected, but the radial velocity signal was later attributed to the stellar companion HD 197037 B.[6]

The HD 197037 A planetary system[9]
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 1.2 "HD 197037". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+197037. 
  2. ↑ 2.0 2.1 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 
  3. ↑ 3.0 3.1 3.2 3.3 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 
  4. ↑ Bowler, Brendan P. (2016), "Imaging Extrasolar Giant Planets", Publications of the Astronomical Society of the Pacific 128 (968): 102001, doi:10.1088/1538-3873/128/968/102001, Bibcode: 2016PASP..128j2001B 
  5. ↑ 5.0 5.1 5.2 5.3 5.4 Brown, A. G. A. (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics 649: A1. doi:10.1051/0004-6361/202039657. Bibcode: 2021A&A...649A...1G.  Gaia EDR3 record for this source at VizieR.
  6. ↑ 6.0 6.1 6.2 6.3 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 
  7. ↑ 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 
  8. ↑ Brown, A. G. A. (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics 649: A1. doi:10.1051/0004-6361/202039657. Bibcode: 2021A&A...649A...1G.  Gaia EDR3 record for this source at VizieR.
  9. ↑ 9.0 9.1 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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