Hipparcos also suggested that Arcturus is a binary star, with the companion about twenty times dimmer than the primary and orbiting close enough to be at the very limits of our current ability to make it out.

Illustration of Antares and its companion star, Antares B

Antares has a secondary companion star, Antares B, that changed from an angular separation of 3. 3 arcseconds in 1854 to 2. 86 arcseconds in 1990.

Spectroscopic examination of the energy states in the outflow of matter from the companion star suggest that it is about 224 AU behind the primary, giving a combined separation of about 574 AU.

The A-type main sequence star has the multiple star designation WDS 19508 + 0852A and has three visual companion stars, WDS 19508 + 0852B, C, and D. Component B is not physically close to A but merely appears close to it in the sky.

* AM CVn, a very blue star of magnitude 14, is the prototype of a special class of cataclysmic variable stars, in which the companion star is a white dwarf, rather than a main sequence star.

This fate may befall carbon-oxygen white dwarfs that accrete matter from a companion giant star, leading to a steadily increasing mass.

It is now estimated that 1 % to 1. 5 % of sunlike stars possess such a planet, where " sunlike star " refers to any main-sequence star of spectral classes late-F, G, or early-K without a close stellar companion.

It is a white star 115 light-years from Earth, and has an optical companion of magnitude 6. 1, 6 Equulei.

* 1862 – Alvan Graham Clark discovers the white dwarf star Sirius B, a companion of Sirius, through an telescope now located at Northwestern University.

These observations also hinted that the companion was a main sequence star of around 0. 7 solar masses and spectral type K, instead of a white dwarf as originally thought.

Artist's conception of a white dwarf star Accretion ( astrophysics ) | accreting hydrogen from a larger companion

If a white dwarf has a close companion star that overflows its Roche lobe, the white dwarf will steadily accrete gas from the companion's outer atmosphere.

The companion may be a main sequence star, or one that is aging and expanding into a red giant.

A white dwarf can potentially generate multiple novae over time as additional hydrogen continues to accrete onto its surface from its companion star.

In 1834, Friedrich Bessel observed changes in the proper motion of the star Sirius, and inferred a hidden companion.

Alternatively a white dwarf star may accumulate sufficient material from a stellar companion ( either through accretion or via a merger ) to raise its core temperature enough to ignite carbon fusion, at which point it undergoes runaway nuclear fusion, completely disrupting it.

Although lower mass stars normally do not burn off their outer layers so rapidly, they can likewise avoid becoming red giants or red supergiants if they are in binary systems close enough so that the companion star strips off the envelope as it expands, or if they rotate rapidly enough so that convection extends all the way from the core to the surface, resulting in the absence of a separate core and envelope due to thorough mixing.

Its brightest star is the white giant star β Trianguli ( 3. 00 < sup > m </ sup >) with a close, dimmer companion.

In town after town my companion pointed out the Negro school and the White school, and in every instance the former made a better appearance ( it was newer, for one thing ).

Our companion was a huge, plain-spoken American sculptor who had been a sixteen-year-old rifleman all across France in 1944.

Only a token start was made in attacking the tax reappraisal question and its companion issue of attracting industry to the state.

There was a little blood on the hem of her dress, for the assassin had slashed Miss Harris's companion, Major Rathbone, with a knife.

One day Maeterlinck, coming with a friend upon an event which he recognized as the exact pattern of a previous dream, detailed the ensuing occurrences in advance so accurately that his companion was completely mystified.

Whoever his companion was going to be, she was going to join him later.

The big, paunchy man named Geely was on that side, half-turned in the seat toward his hatchet-faced companion so that his back partially rested against the closed door.

This place was hatred to him, just as hatred was his only companion in his aloneness.

He was your constant companion ''.

A 256-page companion volume, Shadow Knight, was published in 1993.

Agathon was the lifelong companion of Pausanias, with whom he appears in both the Symposium and Plato's Protagoras.

Abu Bakr ( Abdullah ibn Abi Quhafa ) (, c. 573 CE – 23 August 634 CE ) also known as Abū Bakr as-Șiddīq ( Arabic: أبو بكر الصديق ) was a senior companion ( Sahabi ) and the father-in-law of the Islamic prophet Muhammad.

He was the companion and friend of Alexander the Great in his Asiatic campaigns.

While Dampier was captain of the St. George, Selkirk served on the galley Cinque Ports, the St. Georges companion, as a sailing master serving under Thomas Stradling.

A large collection of Maillol's work is maintained at the Musée Maillol in Paris, which was established by Dina Vierny, Maillol's model and platonic companion during the last 10 years of his life.

Tradition holds that the text was written by Luke the companion of Paul ( named in Colossians ) and this traditional view of Lukan authorship is “ widely held as the view which most satisfactorily explains all the data .” The list of scholars maintaining authorship by Luke the physician is lengthy, and represents scholars from a wide range of theological opinion.

This description was included in Book 8 of his voluminous Philippica, which contains a dialogue between King Midas and Silenus, a companion of Dionysus.

Titus was an early Christian leader, a companion of Saint Paul, mentioned in several of the Pauline epistles.

According to the standard modern text on the work, Lamar Ronald Lacey's The Myth of Aktaion: Literary and Iconographic Studies, the most likely original version of the myth is that Actaeon was the hunting companion of the goddess who, seeing her naked in her sacred spring, attempts to force himself on her.

Orion was Artemis ' hunting companion.

Either she was brought to Tauros and led the priests there, or became Artemis ' immortal companion.

At first a gnostic Valentinian and Marcionist, Ambrose, through Origen's teaching, eventually rejected this theology and became Origen's constant companion, and was ordained deacon.

Bede ( ; ; 672 / 673 – 26 May 735 ), also referred to as Saint Bede or the Venerable Bede (), was an English monk at the Northumbrian monastery of Saint Peter at Monkwearmouth and of its companion monastery, Saint Paul's, in modern Jarrow ( see Monkwearmouth-Jarrow ), both in the Kingdom of Northumbria.