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arxiv.org arXiv
arxiv.org › abs › 1602.02933v1
We present the optical spectroscopic study based on 41 spectra of 4 Her and 32 spectra of 88 Her, obtained over a period of 6 months. We estimate the rotational velocity of these stars from He{\sc i} ...
arxiv.org arXiv
arxiv.org › abs › 1201.5519v1
We have obtained the first estimates of the masses of the components of the Her X-1/HZ Her X-ray binary system taking into account non-LTE effects in the formation of the H_gamma absorption line: mx=1...
arxiv.org arXiv
arxiv.org › abs › 2103.01820v4
Regular variations of the pulse period of Her X-1 with X-ray flux observed by Fermi-GBM are examined. We argue that these regular variations result from the free precession of the neutron star in Her ...
arxiv.org arXiv
arxiv.org › abs › 2305.01197v2
I observed the very fast nova V838 Her (Nova Her 1991, optical peak at 5-5.4 mag) during the fading phase of the nova eruption in 1991. I detected eclipses, for the first time in the world in any nova...
arxiv.org arXiv
arxiv.org › abs › 0704.3062v1
First results of observations of the low mass X-ray binary Her X-1/HZ Her performed by the INTEGRAL satellite in July-August 2005 are presented. A significant part of one 35 day main-on state was cove...
arxiv.org arXiv
arxiv.org › abs › 0808.2228v6
Let $(X,ω)$ be a compact symplectic manifold, $L$ be a Lagrangian submanifold and $V$ be a codimension 2 symplectic submanifold of $X$, we consider the pseudoholomorphic maps from a Riemann surface w...
arxiv.org arXiv
arxiv.org › abs › 2404.01928v1
The first photometric light curve investigation of the NSVS 8294044, V1023 Her, and V1397 Her binary systems is presented. We used ground-based observations for the NSVS 8294044 system and Transiting ...
arxiv.org arXiv
arxiv.org › abs › 1102.3761v1
V446 Her is the best example of an old nova which has developed dwarf nova eruptions in the post-nova state. We report on observed properties of the long-term light curve of V446 Her, using photometry...
arxiv.org arXiv
arxiv.org › abs › astro-ph › 0204351v1
AM Her variables -- synchronised magnetic cataclysmic variables (CVs) -- exhibit a different period distribution from other CVs across the period gap. We show that non-AM Her systems may infiltrate th...
arxiv.org arXiv
arxiv.org › abs › astro-ph › 0605113v1
The author presents the results of Berkeley-Illinois-Maryland (BIMA) array interferometric observations in the CO J=1-0 line toward X Her and EP Aqr, the semiregular pulsating stars with a composite C...