HR 1170
Variable star in the constellation Perseus
HR 1170 , also known as HD 23728 and V376 Persei , is a star about 220 light years from the Earth, in the constellation Perseus .[ 1] It is a 5th magnitude star, so it will be faintly visible to the naked eye of an observer far from city lights . It is a variable star, whose brightness varies slightly from magnitude 5.77 to 5.91.[ 2]
A light curve for V376 Persei, plotted from TESS data[ 10]
Michel Breger announced that HR 1170 is a Delta Scuti variable star in 1969, based on observations taken over 6 hours and 10 minutes on October 13, 1967. He reported that it varied with a mean amplitude of 0.08 magnitudes, over a period of 2.2 hours.[ 11] In 1970 it was given the variable star designation V376 Persei.[ 12]
Early investigations of HR 1170 showed that it has more than one pulsation period,[ 13] as is true for most Delta Scuti stars,[ 14] and the light curve shows the different periods beating with each other. Many investigators have tried to determine the modes of oscillation present in this star.[ 15] [ 16] [ 17] [ 18] [ 19] [ 20] [ 21] All but one[ 19] of these studies find only two significant periods. All agree that one of the periods is approximately 2.386 hours, but the studies do not agree on the second period.[ 21] There is also no agreement as to whether the pulsations are radial, nonradial or a combination of the two, though most of the later studies, which examine data taken over a longer time window, conclude that at least one of the pulsation modes is nonradial.
References
^ a b c d e f g h i Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties" . Astronomy and Astrophysics . 674 : A1. arXiv :2208.00211 . Bibcode :2023A&A...674A...1G . doi :10.1051/0004-6361/202243940 . S2CID 244398875 .
Gaia DR3 record for this source at VizieR .
^ a b c Samus', N. N.; Kazarovets, E. V.; Durlevich, O. V.; Kireeva, N. N.; Pastukhova, E. N. (2017). "General catalogue of variable stars: Version GCVS 5.1" . Astronomy Reports . 61 (1): 80. Bibcode :2017ARep...61...80S . doi :10.1134/S1063772917010085 . S2CID 125853869 .
^ a b Netopil, Martin (August 2017). "Metallicity calibrations for dwarf stars and giants in the Geneva photometric system" . Monthly Notices of the Royal Astronomical Society . 469 (3): 3042–3055. arXiv :1705.00883 . Bibcode :2017MNRAS.469.3042N . doi :10.1093/mnras/stx1077 . Retrieved 12 March 2023 .
^ a b Oja, T. (August 1991). "UBV photometry of stars whose positions are accurately known. VI" . Astronomy and Astrophysics Supplement Series . 89 : 415–419. Bibcode :1991A&AS...89..415O . Retrieved 14 March 2023 .
^ 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 . Retrieved 12 March 2023 .
^ Barac, Natascha; Bedding, Timothy R.; Murphy, Simon J.; Hey, Daniel R. (October 2022). "Revisiting bright δ Scuti stars and their period-luminosity relation with TESS and Gaia DR3" . Monthly Notices of the Royal Astronomical Society . 516 (2): 2080–2094. arXiv :2207.00343 . Bibcode :2022MNRAS.516.2080B . doi :10.1093/mnras/stac2132 . Retrieved 12 March 2023 .
^ a b c Zorec, J.; Royer, F. (January 2012). "Rotational velocities of A-type stars. IV. Evolution of rotational velocities" . Astronomy and Astrophysics . 537 : A120. arXiv :1201.2052 . Bibcode :2012A&A...537A.120Z . doi :10.1051/0004-6361/201117691 . Retrieved 12 March 2023 .
^ Soubiran, C.; Le Campion, J. F.; Cayrel de Strobel, G.; Caillo, A. (June 2010). "The PASTEL catalogue of stellar parameters" . Astronomy and Astrophysics . 515 : A111. arXiv :1004.1069 . Bibcode :2010A&A...515A.111S . doi :10.1051/0004-6361/201014247 . Retrieved 12 March 2023 .
^ "HD 151804 -- Blue Supergiant" . SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved 2023-03-03 .
^ "MAST: Barbara A. Mikulski Archive for Space Telescopes" . Space Telescope Science Institute. Retrieved 11 March 2023 .
^ Breger, M. (March 1969). "Short-period variability of B, A, and F stars. II. Photometry of new Delta Scuti stars" . Astronomical Journal . 74 : 166–176. Bibcode :1969AJ.....74..166B . doi :10.1086/110788 .
^ Kukarkin, B. V.; Kholopov, P. N.; Perova, N. B. (October 1970). "57th Name-List of Variable Stars" . Information Bulletin on Variable Stars . 480 : 1. Bibcode :1970IBVS..480....1K . Retrieved 12 March 2023 .
^ Warman, J.; Malacara, Z.; Breger, M. (November 1974). "The light curves of Delta Scuti stars HR 1170 and HR 7563" . Revista Mexicana de Astronomía y Astrofísica . 1 : 143–150. Bibcode :1974RMxAA...1..143W . Retrieved 14 March 2023 .
^ Jayasinghe, T.; Stanek, K. Z.; Kochanek, C. S.; Vallely, P. J.; Shappee, B. J.; Holoien, T. W. S.; Thompson, Todd A.; Prieto, J. L.; Pejcha, O.; Fausnaugh, M.; Otero, S.; Hurst, N.; Will, D. (April 2020). "The ASAS-SN catalogue of variable stars VI: an all-sky sample of δ Scuti stars" . Monthly Notices of the Royal Astronomical Society . 493 (3): 4186–4208. arXiv :1910.14187 . Bibcode :2020MNRAS.493.4186J . doi :10.1093/mnras/staa499 . Retrieved 14 March 2023 .
^ Breger, M.; Bregman, J. N. (September 1975). "Period-luminosity-color relations and pulsation modes of pulsating variable stars" . Astrophysical Journal . 200 : 343–353. Bibcode :1975ApJ...200..343B . doi :10.1086/153794 .
^ Gupta, S. K. (May 1977). "Study of the Delta Scuti Star HR 1170" . Astrophysics and Space Science . 48 (1): 199–206. Bibcode :1977Ap&SS..48..199G . doi :10.1007/BF00643051 . Retrieved 14 March 2023 .
^ Pena, J. H.; Warman, J. (July 1979). "HR 1170 and HR 7331, two nonradial Delta Scuti pulsators" . Astronomical Journal . 84 : 1046–1055. Bibcode :1979AJ.....84.1046P . doi :10.1086/112511 . Retrieved 14 March 2023 .
^ Pena, J. H.; Warman, J. (April 1980). "On the periods of the del SCT star HR 1170" . Revista Mexicana de Astronomía y Astrofísica . 5 : 5–7. Bibcode :1980RMxAA...5....5P . Retrieved 14 March 2023 .
^ a b Warman, J.; Pena, J. H.; Margrave, T. E. (October 1980). "Nonradial period structure of the del SCT star HR 1170" . Publications of the Astronomical Society of the Pacific . 92 : 696–699. Bibcode :1980PASP...92..696W . doi :10.1086/130732 .
^ Kurtz, D. W. (March 1981). "Radial and non-radial oscillations in the Del SCT star HR 1170" . Monthly Notices of the Royal Astronomical Society . 194 : 747–754. Bibcode :1981MNRAS.194..747K . doi :10.1093/mnras/194.3.747 . Retrieved 14 March 2023 .
^ a b Ostermann, W. M. (February 1990). "Pulsation periods in theδ Scuti star HR 1170" . Astrophysics and Space Science . 164 (1): 87–93. Bibcode :1990Ap&SS.164...87O . doi :10.1007/BF00653553 . Retrieved 14 March 2023 .