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Edward Alfin
Universitas Indraprasta PGRI
Religion Agriculture, Biological Sciences & Forestry Arts Humanities Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Engineering Environmental Science Health Professions Immunology & microbiology Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Materials Science & Nanotechnology Mathematics Medicine & Pharmacology Nursing Physics Public Health Social Sciences Other

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Journal : Journal of Physics and Its Applications

 1 
Relativistic Effects and Stellar Properties in Hipparcos Binary Stars, White Dwarfs, and Neutron Stars Yasin, Verdi; Sahroni, Taufik Roni; Siagian, Ruben Cornelius; Mardiyati, Sri; Pramarta, Pandhu; Wujarso, Riyanto; Saprudin, Saprudin; Alfin, Edward
Journal of Physics and Its Applications Vol 8, No 1 (2026): February 2026
Publisher : Diponegoro University Semarang Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jpa.v8i1.29176

Abstract

The research analyzes astrophysical phenomena in binary stars, fast stars, white dwarfs, and neutron stars, taking relativistic effects into account using Hipparcos catalog data. The objectives are to evaluate the relativistic precession of binary stars, the Shapiro delay due to the supermassive black hole Sgr A, the relativistic correction of neutron star luminosity, the distribution of star populations in the Hertzsprung–Russell diagram, the gravitational redshift of white dwarfs, and the characteristics of stars with extreme transverse velocities. Data from 10,726 binary star systems and 602 white dwarfs were processed numerically using R for data manipulation, visualization, and statistical calculations. The results show that relativistic precession in binary stars is generally small, increases in narrow orbits, and follows a power law with respect to the semi-major axis (exponent −0.453). Shapiro delay varies with projected distance to Sgr A, with most stars experiencing small delays, while some experience delays of up to 310 seconds. Neutron star luminosity shows a relativistic correction of ~0.03%, consistent with gravitational redshift and time dilation. The Hertzsprung–Russell diagram shows a clear separation between giants, main sequence stars, and white dwarfs, with a significant linear relationship between absolute magnitude and color index (B−V). The gravitational redshift of white dwarfs is controlled by radius (exponent −1.0001), while stars with extreme velocities form a heterogeneous and evenly distributed population. In conclusion, Hipparcos data support general relativity predictions and enable quantitative evaluation of stellar physics and evolution. Research novelties include systematic measurements of relativistic precession, Shapiro delay, neutron star luminosity corrections, white dwarf radius–redshift relationships, and kinematic characteristics of extreme stars.
Co-Authors Ade Setiawan Agustina, Lasia Ai Dianti Alifa Bunga Mariah Andani, Chairiah Apriliani, Pina Ari Purwaningsih arifah, nayunka rizani Bambang Perkasa Alam DESI NATALIA, DESI Destiana, Fadya Dewi Rahayu Diah Turis Kaemirawati Dinda Andriyani Fauzi Mulyatna Febriani, Vina Nur Firdaus Budhy Saputro Giri Marhento Haryanto Haryanto Hendra Hendra Hernaeny, Ulfah Hernaeny, Ulfah Humairoh Humairoh Huri Suhendri Ida Fitriani Kasih Haryo Basuki Kristiyanto Kristiyanto Kuvaini, Aang Lativa, Vaniatul Mamik Suendarti Mardiyati, Sri - maulida nasiha, siti syarah Muhamad Farhan Muhammad Imron Mulyadi Mutia, Rahma Napis Napis Niode , Alim S Novi Marliani Novrita Mulya Rosa Nugroho, Erwin Raka Nur Rizkiyah Nur Rizkiyah Nurdeni, Nurdeni Nurfaika Nurfaika Nurfatah, Agus nurhangesti, mutiara Nurhayati Nurhayati Nurhayati Nurhayati Nurrahmah, Arfatin Pandhu Pramarta Popi Purwanti Pramarta, Pandhu Prawanti, Diah Amalia Pujiastuti Pujiastuti Pujiastuti Pujiastuti Pujiastuti, Pujiastuti Rahmatulloh Rahmatulloh Rahmatulloh, Rahmatulloh Ramla Hartini Melo Renata Santoso Riantika Yuliani Ricky Eka Sanjaya Rijoice, Marissa Ririn Regiana Dwi Satya, Ririn Regiana Dwi Rita Ningsih Rizqi Ramadhani, Rizqi Sahroni, Taufik Roni Saprudin Saprudin, Saprudin Setyawati, Nunuk Siagian, Ruben Cornelius Siboro, Meilysa Berliana Sonny, Micheal Sri Mardiyati Sriyono Sriyono Stevani Priscila Sunardi, Alfianisa Karromah Supriyatno, Dawud Tanamal, Nini Adelina Tri Angkarini Wenda Nur Kawiyah Wujarso, Riyanto Yasin, Verdi Yoga Budi Bhakti Zaidan, Muhammad Zainal Arifin