Results 1 to 10 of about 1,008,045 (157)

Modelling and observations of molecules in discs around young stars [PDF]

, 2013
This thesis contains a study of molecules within circumstellar discs around young stars. Firstly, the chemistry of a disc around a young, Class 0 protostar is modelled.
Ilee, John David
core   +6 more sources

V1507 CYGNI (HD187399): A Highly Evolved, Enigmatic Interacting Binary System with an Eccentric Orbit

The Astronomical Journal, 2023
The properties of the interacting, eccentric orbit binary V1507 Cyg (HD187399) are examined with spectra that cover wavelengths from 0.63–0.68 μ m. The spectrum of the brightest star is similar to that of the B8 I star β Ori, although with absorption ...
T. J. Davidge
doaj   +1 more source

NY Bootes: An Active Deep and Low-mass-ratio Contact Binary with a Cool Companion in a Hierarchical Triple System

The Astrophysical Journal, 2023
The first detailed photometric and spectroscopic study of G-type short-period binary NY Boo is presented. The radial velocity curve was obtained by the cross-correlation function (CCF) method based on LAMOST and SDSS spectra, which derived its mass ratio
Fangbin Meng, Liying Zhu, Shengbang Qian, Nianping Liu, Linjia Li, Azizbek Matekov   +5 more
doaj   +1 more source

Orbital Elements of visual binary stars with very short arcs: With application to double stars from the 1829 southern double star catalog of James Dunlop [PDF]

, 2022
Binary double stars are those whose binding energies are less than zero. Obtaining binary star orbits from short arcs has been a long-standing problem in astrophysics.
Roderick R. Letchford, Carolyn J. Brown, Brown, Carolyn J., White, Graeme L., Graeme L. White, Letchford, Roderick R.   +5 more
core   +1 more source

POSYDON: A General-purpose Population Synthesis Code with Detailed Binary-evolution Simulations

The Astrophysical Journal Supplement Series, 2023
Most massive stars are members of a binary or a higher-order stellar system, where the presence of a binary companion can decisively alter their evolution via binary interactions. Interacting binaries are also important astrophysical laboratories for the
Tassos Fragos, Jeff J. Andrews, Simone S. Bavera, Christopher P. L. Berry, Scott Coughlin, Aaron Dotter, Prabin Giri, Vicky Kalogera, Aggelos Katsaggelos, Konstantinos Kovlakas, Shamal Lalvani, Devina Misra, Philipp M. Srivastava, Ying Qin, Kyle A. Rocha, Jaime Román-Garza, Juan Gabriel Serra, Petter Stahle, Meng Sun, Xu Teng, Goce Trajcevski, Nam Hai Tran, Zepei Xing, Emmanouil Zapartas, Michael Zevin   +24 more
doaj   +1 more source

Wide binary stars in the Galactic field : a statistical approach [PDF]

, 2010
This thesis focuses on the statistical properties of wide binary (WB) star systems in the Galactic field. With projected separations larger than 200 AU and, consequently, having very low binding energies, WB are sensitive probes of the Galactic ...
Longhitano, Marco
core   +1 more source

New spectroscopic binary companions of giant stars and updated metallicity distribution for binary systems [PDF]

, 2016
We report the discovery of 24 spectroscopic binary companions to giant stars. We fully constrain the orbital solution for 6 of these systems. We cannot unambiguously derive the orbital elements for the remaining stars because the phase coverage is ...
Vanzi, L., Wittenmyer, R., Drass, H, L. Vanzi, Jenkins, J., Wittenmyer, R. A., Bluhm, P., Rojo, P, Bluhm, P, Voss, J., Vuckovic, M, Wittenmyer, RA, Soto, M., Vuckovic, M., H. Drass, Vanzi, Leonardo, Jenkins, James Stewart, Jones, M. I., C. H. F. Melo, Rojo, P., Olivares, F., Drass, H., Jones, MI, P. Rojo, Soto, M. G, Melo, CHF, R. A. Wittenmyer, F. Olivares, M. Vučković, Mennickent, R. E., Jenkins, J. S., Jones Fernández, Matías Ignacio, Melo, C. H. F., Vanzi, L, Soto, M. G., Olivares, F, M. G. Soto, J. Vos, P. Bluhm, Drass, Holger, J. S. Jenkins, R. E. Mennickent, Mennickent, RE, Melo, C., Jenkins, JS, Mennickent, R., Voss, J, Vos, J., M. I. Jones, Soto, MG   +49 more
core   +1 more source

Gravitoastronomy with neutron stars [PDF]

, 2004
Recent advances in gravitational wave detectors mean that we can start to make astrophysically important statements about the physics of neutron stars based on observed upper limits to their gravitational luminosity.
Woan, G., Graham Woan
core   +1 more source

Born to Be Wide: The Distribution of Wide Binaries in the Field and Soft Binaries in Clusters

The Astrophysical Journal, 2023
Most stars, binaries, and higher-multiplicity systems are thought to form in stellar clusters and associations that later dissociate. Very wide binaries can be easily disrupted in clusters due to dynamical evaporation (soft binaries) and/or tidal ...
Mor Rozner, Hagai B. Perets
doaj   +1 more source

The magnetosphere of the close accreting PMS binary V4046 Sgr [PDF]

, 2014
SGG acknowledges support from the Science & Technology Facilities Council (STFC) via an Ernest Rutherford Fellowship [ST/J003255/1]. GAW is supported by a Discovery Grant from the Natural Science & Engineering Research Council of Canada (NSERC).V4046 ...
Damiani, F., V. R. Holzwarth, Audard, M., Audard, M, Güdel, M, J.-F. Donati, Gregory, S. G.; id_orcid, S. H. P. Alencar, D. P. Huenemoerder, Wade, G. A., Huenemoerder, D. P, Sacco, G. G, Holzwarth, V.R., Wade, G.A., Argiroffi C., Maggio, A, Kastner, J.H., C. Argiroffi, Kastner J. H., Hussain, G. A. J, Bouvier, J, M. Audard, Alencar, S. H. P, Sacco, G. G., Huenemoerder, D.P., Holzwarth V. R., Huenemoerder D. P., Gregory, S.G., Hussain, G. A. J., Maggio, A., Damiani F., A. Maggio, ARGIROFFI, Costanza, Donati, J.-F., Damiani, F, Audard, Marc, F. Damiani, Sacco G. G., Hussain, G.A.J., Alecian, E., Sacco, G.G., Montmerle, T, Donati J.-F., Alencar S. H. P., Güdel, M., Argiroffi, C., Kastner, J. H., Alecian, E, Alencar, S.H.P., Gregory, S. G, Gregory, S. G., Montmerle T., G. A. J. Hussain, Donati, J. -F., Alencar, S. H. P., Audard M., E. Alecian, Kastner, J. H, T. Montmerle, Montmerle T, J. Bouvier, Wade G. A., Donati, J. F, J. H. Kastner, G. G. Sacco, Holzwarth, V. R., Bouvier, J., Alecian E., M. Güdel, Bouvier J., Gregory S. G., G. A. Wade, Güdel M., Montmerle, T., Huenemoerder, D. P., Maggio A., Holzwarth, V. R, S. G. Gregory, Hussain G. A. J.   +78 more
core   +1 more source