Results 11 to 20 of about 2,261,610 (72)

Superhumps in AM Canum Venaticorum stars [PDF]

, 1996
The AM Canum Venaticorum stars are an in homogeneous group of six stars that are characterised by the absence of hydrogen lines in their spectra. The structure of these stars has been the subject of much debate, and single star models were considered as recently as 1992.
Harrop-Allin, Margaret
core   +3 more sources

The UV-excess survey of the Northern Galactic Plane [PDF]

, 2009
The UV-Excess survey of the northern Galactic plane images a 10 degrees x 185 degrees wide band, centred on the Galactic equator using the 2.5-m Isaac Newton Telescope in four bands (U, g, r, He 15875) down to similar to 21-22 mag (similar to 20 in He ...
Roelofs, Gijs H. A., Drew, J, Deacon, N, Schellart, P, van den Besselaar, Else J.M., Groot, Paul J., Gaensicke, B. T., Aungwerojwit, Amornrat, Gonzalez-Solares, E, Rodríguez-Gil, Pablo, Deacon, Niall, King, R., Gonzalez-Solares, E. A., Knigge, Christian, Morales-Rueda, L., Barlow, M, Morales-Rueda, L, Marsh, Tom R., Naylor, Tim, Unruh, Yvonne, Barros, S, Deacon, N. R., Hu, H, Corradi, Romano, Corradi, R, Augusteijn, T, Roelofs, Gijs H A, Nelemans, G., Woudt, Patrick, Heber, Uli, Walton, NA, Augusteijn, Thomas, Oosting, T., Irwin, Mike, Irwin, M, Napiwotzki, Ralf, Drew, J. E., Pyrzas, Stylianos, Steeghs, D., Rodriguez-Gil, P, Pyrzas, S, Steeghs, D, Corral-Santana, JM, de Groot, E, Hu, Haili, Sale, Stuart, Barros, Susana, Walton, Nicholas A., Zijlstra, Albert, Aungwerojwit, A, Barros, S. C. C., Jonker, Peter G., Groot, PJ, Unruh, Y, Hu, H., Rodriguez-Gil, P., Greimel, R, Napiwotzki, R, Unruh, Y. C., Casares, J., Pyrzas, S., Mampaso, A, Jonker, PG, Greimel, R., Pretorius, M, Naylor, T., Casares, Jorge, Weston, S, Besselaar, Else J. M. van den, de Groot, E., Steeghs, Danny, Verbeek, K, González-Solares, Eduardo, Witham, A, Witham, Andrew, Greimel, Robert, Morales-Rueda, Luisa, King, R, Drew, Janet, Zijlstra, A, Augusteijn, T., Corral-Santana, Jesus M., Nelemans, Gijs, Gaensicke, BT, Szyszka, C, Mampaso, A., Woudt, P. A., Knigge, C, Jonker, P. G., Roelofs, GHA, Naylor, T, Schellart, Pim, Szyszka, Cezary, Zijlstra, A. A., van Ham, W, Groot, P. J., Aungwerojwit, A., Van Ham, Wilbert, Walton, N. A., Zijlstra, Albert; id_orcid, Mampaso, Antonio, Oosting, Tim, Weston, Simon, Verbeek, Kars, King, Rob, Sale, S. E., Heber, U., Sale, S, Casares, J, Woudt, P, Corradi, R. L. M., Gänsicke, Boris T., Marsh, T. R., van den Besselaar, EJM, Oosting, T, Barlow, Mike, Heber, U, Nelemans, G, Barlow, Michael J., Pretorius, Magaretha, de Groot, Eelco, Van Den Besselaar, Else J M, Marsh, TR, Deacon, N.R., Napiwotzki, R., Groot, P.J., Groot, E de, Verbeek, K., Weston, S., Irwin, M.J., Nelemans, G.A., Groot, P., Besselaar, E.J.M. van den, et al., Schellart, P., Drew, J.E., Gansicke, B.T., Ham, W.C.P. van, Gonzalez-Solares, E.   +138 more
core   +9 more sources

New candidates for AM Canum Venaticorum stars among ASAS-SN transients [PDF]

Publications of the Astronomical Society of Japan, 2021
Abstract We studied Zwicky Transient Facility (ZTF) light curves of 34 dwarf nova candidates discovered by the All-Sky Automated Survey for Supernovae (ASAS-SN) between 2020 May 12 and September 9 and found six AM CVn-type candidates. All objects showed short outbursts (post-superoutburst rebrightenings) on the fading tail.
Kato, Taichi, Kojiguchi, Naoto
openaire   +2 more sources

Disk Instability Model for the AM Canum Venaticorum Stars [PDF]

Publications of the Astronomical Society of Japan, 1997
We examine AM CVn stars, ultra-short-period variables thought to have helium disks, from the stand-point of the disk instability model. By calculating the vertical structure of the helium accretion disks, we have confirmed that the helium accretion disks are thermally unstable, since their thermal-equilibrium curves exhibit the characteristic S-shaped ...
Motohiko Tsugawa, Yoji Osaki
openaire   +1 more source

AM CANUM VENATICORUM PROGENITORS WITH HELIUM STAR DONORS AND THE RESULTANT EXPLOSIONS [PDF]

The Astrophysical Journal, 2015
We explore the outcome of mass transfer via Roche lobe overflow (RLOF) of $M_{\rm He}\lesssim0.51 M_\odot$ pure helium burning stars in close binaries with white dwarfs (WDs). The evolution is driven by the loss of angular momentum through gravitational wave radiation (GWR), and both stars are modeled using Modules for Experiments in Stellar ...
Brooks, Jared, Bildsten, Lars, Marchant Campos, Pablo, Paxton, Bill   +3 more
openaire   +3 more sources

THEORETICAL SPECTRA OF THE AM CANUM VENATICORUM BINARY SYSTEM SDSS J0926+3624: EFFECTS OF IRRADIATION ONTO THE DONOR STAR [PDF]

The Astrophysical Journal, 2011
Taking into account a range of parameters determined from evolutionary models and available observational data, the detailed non-LTE spectrum for the primary star and the irradiated donor star in the AM Canum Venaticorum system SDSS J0926+3624 are constructed based on the TLUSTY stellar atmosphere code.
Sujan Sengupta, Ronald E. Taam
openaire   +1 more source

The population of AM CVn stars from the Sloan Digital Sky Survey [PDF]

, 2007
Contains fulltext : 36605.pdf ( ) (Open Access)The AM Canum Venaticorum (AM CVn) stars are rare interacting white dwarf binaries, whose formation and evolution are still poorly known. The Sloan Digital Sky Survey provides, for the first
Nelemans, G.A., Roelofs, G.H.A., Groot, P.J.   +2 more
core   +1 more source

Magnetic activities on two single-lined RS Canum Venaticorum binaries IM Pegasi and $\sigma$ Geminorum [PDF]

, 2022
We present the study on continuous high-resolution spectroscopic observations of two long-period single-lined RS Canum Venaticorum (RS CVn) binary stars IM Pegasi (IM Peg) and $\sigma$ Geminorum ($\sigma$ Gem), obtained with the Hertzsprung SONG ...
Gu, Shenghong, Grundahl, F., Pallé, P. L., Cao, Dongtao, Dongtao Cao, P L Pallé, Shenghong Gu, F Grundahl   +7 more
core   +1 more source

Kinematics of the ultracompact helium accretor AM canum venaticorum [PDF]

, 2006
We report on the results from a five-night campaign of high-speed spectroscopy of the 17-min binary AM Canum Venaticorum (AM CVn), obtained with the 4.2-m William Herschel Telescope on La Palma.
Roelofs, Gijs H. A., Nelemans, G., Marsh, T.R., Steeghs, D., Nelemans, G.A., Groot, P. J., Roelofs, G.H.A., Marsh, T. R., Groot, P.J.   +8 more
core   +1 more source

Coherent radio emission from a population of RS Canum Venaticorum systems [PDF]

, 2021
International audienceCoherent radio emission from stars can be used to constrain fundamental coronal plasma parameters, such as plasma density and magnetic field strength.
Veken, K.C., H. J. A. Röttgering, J. R. Callingham, T. W. Shimwell, Toet, S. E.B., Veken, K., C, Shimwell, T.W., H. K. Vedantham, S. E. B. Toet, Callingham, J.R., Toet, S., E B, Vedantham, H., K, Callingham, J. R., K. C. Veken, Zarka, P., Toet, S.E.B., Rottgering, H.J.A., A. Drabent, Shimwell, T. W., P. Zarka, Shimwell, T., W, Vedantham, H. K., Drabent, A., Röttgering, H., J A, Veken, K. C., Röttgering, H. J.A., Callingham, J., R, Vedantham, H.K., Toet, S.,, Shimwell, T.,, Vedantham, H.,, Veken, K.,, Callingham, J.,, Röttgering, H.,   +33 more
core   +1 more source