Results 141 to 150 of about 141,416 (254)

Exploring the complexities of cooperative breeding: insights from African wild dog packs

Journal of Zoology, Volume 328, Issue 1, Page 16-29, January 2026.
Across 14 years of monitoring African wild dog packs in Savé Valley Conservancy, Zimbabwe, we found that younger and larger packs were significantly more likely to produce multiple litters, with second‐born pups showing higher survival. Pup survival also increased with pack size, rainfall, and alpha female age, highlighting the adaptive benefits of ...
R. J. Groom, J. Comley, A. Wolton, N. Ngwenya, R. Mandisodza‐Chikerema, J. P. Watermeyer   +5 more
wiley   +1 more source

Millinovae: A New Class of Transient Supersoft X-Ray Sources without a Classical Nova Eruption

The Astrophysical Journal Letters
Some accreting binary systems containing a white dwarf (such as classical novae or persistent supersoft sources) are seen to emit low-energy X-rays with temperatures of  ∼ 10 ^6 K and luminosities exceeding 10 ^35 erg s ^−1 .
Przemek Mróz, Krzysztof Król, Hélène Szegedi, Philip Charles, Kim L. Page, Andrzej Udalski, David A. H. Buckley, Gulab Dewangan, Pieter Meintjes, Michał K. Szymański, Igor Soszyński, Paweł Pietrukowicz, Szymon Kozłowski, Radosław Poleski, Jan Skowron, Krzysztof Ulaczyk, Mariusz Gromadzki, Krzysztof Rybicki, Patryk Iwanek, Marcin Wrona, Mateusz J. Mróz   +20 more
doaj   +1 more source

Photometric study of southern SU UMa-type dwarf novae and candidates -- III: NSV 10934, MM Sco, AB Nor, CAL 86

, 2003
We photometrically observed four southern dwarf novae in outburst (NSV 10934, MM Sco, AB Nor and CAL 86). NSV 10934 was confirmed to be an SU UMa-type dwarf nova with a mean superhump period of 0.07478(1) d.
Heathcote, B., Kato, T., Monard, B., Nelson, P., Richards, T., Santallo, R., Stockdale, C., Stubbings, R., Yamaoka, H.   +8 more
core   +2 more sources

The inter-outburst behavior of cataclysmic variables [PDF]

Existing International Ultraviolet Explorer (IUE) and American Association of Variable Star Observers (AAVSO) archive data was used to accomplish a large scale study of what happens to the ultraviolet flux of accretion disk systems during the quiescent ...
Mattei, Janet A., Stablein, Clay, Szkody, Paula, Waagen, Elizabeth O.   +3 more
core   +1 more source

On the occurrence of dwarf nova outbursts in post novae

, 2000
accepted for publication in Astronomy and ...
Schreiber, M. R., Gansicke, B. T., Cannizzo, J. K.   +2 more
openaire   +3 more sources

Observations of Five Southern-hemisphere Cataclysmic Binary Stars

The Astronomical Journal
We present observations and analyses of five little-studied cataclysmic binary stars in the southern celestial hemisphere. Our new observations are from the South African Astronomical Observatory.
John R. Thorstensen, Annabelle E. Niblett, Shreya Gandhi, Lauren P. Zanarini, Gavin D. Goss, Arnav Singh, Divik Verma, Ryan C. Hickox, Emmanuel A. Durodola, Jiaqi Martin Ying   +9 more
doaj   +1 more source

The 2006 November outburst of EG Aquarii: the SU UMa nature revealed

, 2008
We report time-resolved CCD photometry of the cataclysmic variable EG Aquarii during the 2006 November outburst During the outburst, superhumps were unambiguously detected with a mean period of 0.078828(6) days, firstly classifying the object as an SU ...
Arai, Akira, Chiyonobu, Shingo, Fukazawa, Yasushi, Hayashi, Takehiro, Imada, Akira, Ishioka, Ryoko, Katagiri, Hideaki, Kato, Taichi, Kawabata, Koji S., Kino, Masaru, Kitagawa, Masahiro, Kiyota, Seiichiro, Krajci, Thomas, Kubota, Kaori, Maehara, Hiroyuki, Masi, Gianluca, Mizuno, Tsunefumi, Monard, L. A. G., Moritani, Yuuki, Nagae, Osamu, Nakajima, Kazuhiro, Nogami, Daisaku, Ohsugi, Takashi, Okita, Kiichi, Sadakane, Kozo, Sato, Shuji, Stubbings, Rod, Sugiyasu, Kei, Takahashi, Hiromitsu, Torii, Ken'ichi, Ueda, Atsushi, Uemura, Makoto, Yamashita, Takuya, Yanagisawa, Kenshi, Yoshida, Michitoshi   +34 more
core   +1 more source

Spectroscopic Identification and Population Properties of Cataclysmic Variables from DESI DR1

The Astrophysical Journal Supplement Series
We present a systematic search for cataclysmic variables (CVs) using spectroscopic data from Data Release 1 of the Dark Energy Spectroscopic Instrument. Applying the Bagging-TopPush algorithm, we identified 433 CV candidates and related objects, of which
Wen Hou, Jia-Mao Lin, A-Li Luo, Zhi-Bin Dai, Yi-Qiao Dong, Shu-Guo Ma   +5 more
doaj   +1 more source

Ultraviolet spectroscopy of old novae and symbiotic stars [PDF]

The IUE spectra are presented for two old novae and for two of the symbiotic variables. Prominent emission line spectra are revealed as a continuum whose appearance is effected by the system inclination.
Ferland, G. J., Lambert, D. L., Shields, G. A., Slovak, M. H.   +3 more
core   +1 more source

A 70 pc Diameter Nova Superremnant Surrounding the Recurrent Nova RS Ophiuchi

The Astronomical Journal
Recurrent novae undergo thermonuclear-powered eruptions separated by less than 100 yr, enabled by subgiant or red giant donors transferring hydrogen-rich matter at very high rates onto their massive white dwarf companions.
Michael M. Shara, Kenneth M. Lanzetta, Alexandra Masegian, James T. Garland, Stefan Gromoll, Alexei Kniazev, Lee Townsend, David Zurek, Joanna Mikolajewska, David Valls-Gabaud, Frederick M. Walter, John K. Webb   +11 more
doaj   +1 more source