Change in the design of tapping spouts

Guseinov, B.

doi:10.1007/bf00735454

Cited by 4 publications

(5 citation statements)

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“…A more detailed orbit was estimated by Margoni et al (1988): P = 362.8 ± 0.1 days, K = 48 ± 2 km s −1 , e = 0.30 ± 0.03. KS Per has been proposed as a binary BH in the literature (Zeldovich & Guseynov 1966;Guseinov & Zel'dovich 1966).…”

Section: Objects With the Largest Magnitudes Of Accelerationmentioning

confidence: 99%

Verification of Astrometrically Accelerating Stars from Hipparcos and Gaia. I. Methodology and Application to HIP 44842

Makarov,

Tokovinin

2024

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A large number of candidate binary stars with apparent acceleration on the sky has emerged from analysis of astrometric data collected by the Hipparcos, Tycho-2, and Gaia space missions. Although the apparent acceleration can serve as a relatively reliable indicator of binarity, it provides scarce information about the orbital and physical parameters of the components. With an emphasis on the search for stellar-mass black holes and neutron stars hidden in binary systems, we start a broader effort to characterize the most promising candidates using follow-up ground-based observations. Accurate quantification of orbital and physical parameters of systems with dim or invisible companions requires combination of Hipparcos, Gaia, and precision spectroscopic measurements. In this paper, we review the necessary steps in this implementation and describe the improved Hipparcos–Gaia sample of long-term astrometric accelerations, which includes correction of sky-correlated systematic errors using the vector spherical decomposition method. As an example, we study one Hipparcos star with a large acceleration, HIP 44842, where the companion is revealed to be a normal main-sequence star.

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Section: Objects With the Largest Magnitudes Of Accelerationmentioning

confidence: 99%

Verification of Astrometrically Accelerating Stars from Hipparcos and Gaia. I. Methodology and Application to HIP 44842

Makarov,

Tokovinin

2024

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“…Optical observations of visible stars in binaries with unseen objects have been proposed to hunt BHs (Guseinov & Zel'dovich 1966;Trimble & Thorne 1969;Gu et al 2019). Identification of BHs by measuring their dynamical masses in this way has become a hot topic (e.g., Gould & Salim 2002;Breivik et al 2017;Mashian & Loeb 2017;Yalinewich et al 2018;Yamaguchi et al 2018;Andrews et al 2019;Shao & Li 2019;Yi et al 2019;Shikauchi et al 2020Shikauchi et al , 2022Wiktorowicz et al 2020;Chawla et al 2022;Janssens et al 2022).…”

Section: Detached Bh Systems With a Main-sequence/giant Companionmentioning

confidence: 99%

“…With gravitational microlensing, optical surveys have been carried out to probe a wide range of stellar-remnant masses (Wyrzykowski & Mandel 2020;. In binary systems, radial velocity searches of optical companions have been proposed to discover quiescent BHs (Guseinov & Zel'dovich 1966;Trimble & Thorne 1969;Gu et al 2019). Recently, a series of optical surveys are implemented to identify these types of BHs in the Galactic field (e.g., Liu et al 2019;Thompson et al 2019;Zheng et al 2019;Rowan et al 2021;Fu et al 2022;Gaia Collaboration et al 2022;Gomel et al 2022;Jayasinghe et al 2022;Mahy et al 2022;Shahaf et al 2022;Tanikawa et al 2022), globular clusters (Giesers et al 2018(Giesers et al , 2019, and the Large Magellanic Cloud (Shenar et al 2022a(Shenar et al , 2022b.…”

Section: Introductionmentioning

confidence: 99%

On the Neutron Star/Black Hole Mass Gap and Black Hole Searches

Shao

2022

Res. Astron. Astrophys.

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Mass distribution of black holes in low-mass X-ray binaries previously suggested the existence of a $ \sim 2-5M_{\odot} $ mass gap between the most massive neutron stars and the least massive black holes, while some recent evidence appears to support that this mass gap is being populated. Whether there is a mass gap or not can potentially shed light on the physics of supernova explosions that form neutron stars and black holes, although significant mass accretion of neutron stars including binary mergers may lead to the formation of mass-gap objects. In this review, I collect the compact objects that are probable black holes with masses being in the gap. Most of them are in binaries, their mass measurements are obviously subject to some uncertainties. Current observations are still unable to confidently infer an absence or presence of the mass gap. Ongoing and future surveys are expected to build the mass spectrum of black holes which can be used to constrain the process of their formation especially in binaries. I describe the theoretical predictions for the formation of black holes in various types of binaries, and present some prospects of searching for black holes via electromagnetic and gravitational wave observations.

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“…All papers on neutron-star structure before 1968 obviously count as predictions, and a surprising fraction of them are worth re-reading. Just now, however, we are struck by a pair that predicts the neutrino flux from a single corecollapse (supernova) event (Zeldovich and Guseinov 1965) and then addresses the detectability of the background flux due to the sum of all past events (Guseinov 1966). A bit esoteric you say?…”

Section: Why Stars Become Red Giantsmentioning

confidence: 99%

Astrophysics in 1995

Trimble¹,

Leonard²

1996

PASP

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Ap95 differs from Ap91 to Ap94 primarily in Ap number. That is, it once again attempts to highlight some areas of our mutual science where a major event has occurred during the year (a possible solution of the Type II supernova problem, the faintness of quasar host galaxies, the collision of Shoemaker-Levy 9 with Jupiter), but also to focus on some topics where dogged determination is producing more gradual advances (dense star clusters, the second-parameter problem, inventories of nearby objects, and dark-matter candidates). In moderate departure from the rules of Ap92-94, there has been some deliberate up-dating of topics discussed previously. The topics are only partly ordered from nearby to far away.

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Change in the design of tapping spouts

Cited by 4 publications

References 0 publications

Verification of Astrometrically Accelerating Stars from Hipparcos and Gaia. I. Methodology and Application to HIP 44842

Verification of Astrometrically Accelerating Stars from Hipparcos and Gaia. I. Methodology and Application to HIP 44842

On the Neutron Star/Black Hole Mass Gap and Black Hole Searches

Astrophysics in 1995

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