Astronomers have conducted photometric and spectroscopic observations of a binary system known as TIC 60040774. Results of the observational campaign shed more light on the properties of this system, revealing that it is an eclipsing post-common-envelope binary. The study was published August 5 on arXiv.org.
A common envelope (CE) is gas that contains a binary star system. Observations show that once the more massive star in a binary leaves the main sequence, and depending on the initial conditions, dynamically unstable mass transfer or a tidal instability may force such a system to enter the CE phase.
The CE evolution produces a significant population of close, but detached white-dwarf/main-sequence (WDMS) binaries. Approximately a quarter of WDMS are close enough that they must be the so-called post-common-envelope binaries (PCEBs), and about 10% of these systems exhibit eclipses. Studies of PCEBs could advance our knowledge regarding formation and evolution of close compact binary stars.
That is why a team of astronomers led by Rhorom Priyatikanto of the National Research and Innovation Agency in Bandung, Indonesia, investigated TIC 60040774—one of the close binaries with a low-mass secondary star, located some 437 light years away. Previous studies have suggested that it may be a PCEB.
“In this paper, we present the discovery and characterization of a bright new eclipsing PCEB. The system, TIC 60040774, is a high proper-motion object that lies close to the WD sequence in the color-magnitude diagram and is located fairly nearby,” the researchers wrote.
The team analyzed the light curve of TIC 60040774 from the Transiting Exoplanet Survey Satellite (TESS), multi-band photometry from the Virtual Observatory SED Analyzer (VOSA), and spectroscopic data obtained the Southern African Large Telescope (SALT). They found that this system consists of a young white dwarf and an M dwarf companion.
According to the study, the white dwarf in TIC 60040774 has a mass of nearly 0.6 solar masses and an effective temperature of 14,050 K. When it comes to the companion dwarf star, it was found to be of spectral type M6.5, with a mass of about 0.11 solar masses and effective temperature at a level of 2,759 K.
The orbital period of the system was estimated to be 9.71 hours, therefore relatively long when compared to other known PCEBs. The total age of TIC 60040774 the system was calculated to be approximately 1.024 billion years and the researchers assume that the common-envelope stage occurred some 243 million years ago.
Summing up the results, the astronomers concluded that TIC 60040774 most likely started from binary with a late B primary star with a mass of around 2.5 solar masses and an initial separation of approximately 2.4 AU. However, they added that more precise high-cadence photometry is required in order to better understand the history and nature of this system.
New eclipsing binary system detected by Kepler spacecraft
R. Priyatikanto et al, Characterisation of the eclipsing post-common-envelope binary TIC 60040774. arXiv:2208.02986v1 [astro-ph.SR], arxiv.org/abs/2208.02986
© 2022 Science X Network
Citation:
Astronomers detect new eclipsing post-common-envelope binary (2022, August 15)
retrieved 15 August 2022
from https://phys.org/news/2022-08-astronomers-eclipsing-post-common-envelope-binary.html
This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no
part may be reproduced without the written permission. The content is provided for information purposes only.
Astronomers detect new eclipsing post-common-envelope binary & Latest News Update
Astronomers detect new eclipsing post-common-envelope binary & More Live News
All this news that I have made and shared for you people, you will like it very much and in it we keep bringing topics for you people like every time so that you keep getting news information like trending topics and you It is our goal to be able to get
all kinds of news without going through us so that we can reach you the latest and best news for free so that you can move ahead further by getting the information of that news together with you. Later on, we will continue
to give information about more today world news update types of latest news through posts on our website so that you always keep moving forward in that news and whatever kind of information will be there, it will definitely be conveyed to you people.
Astronomers detect new eclipsing post-common-envelope binary & More News Today
All this news that I have brought up to you or will be the most different and best news that you people are not going to get anywhere, along with the information Trending News, Breaking News, Health News, Science News, Sports News, Entertainment News, Technology News, Business News, World News of this made available to all of you so that you are always connected with the news, stay ahead in the matter and keep getting today news all types of news for free till today so that you can get the news by getting it. Always take two steps forward
Credit Goes To News Website – This Original Content Owner News Website . This Is Not My Content So If You Want To Read Original Content You Can Follow Below Links