Results 41 to 50 of about 498 (87)

Discovery and Initial Investigation of a New Low Surface Brightness Planetary Nebula Candidate at High Galactic Latitude

Astronomische Nachrichten, Volume 347, Issue 3, March 2026.
ABSTRACT Planetary nebulae represent a late evolutionary phase of low‐ to intermediate‐mass stars. In this article, we present the serendipitous discovery of a previously unknown, faint potential Galactic planetary nebula (PN) in the constellation Camelopardalis, identified during a survey‐inspection, aiming at the detection of dwarf companions of the ...
W. E. Celnik, P. Köchling, S. Kotov, J. Kozok, Y. Galata, L. Magrini, A. Moiseev, M. Nischang, C. Reese, P. Remmel, P. Riepe, T. Zilch, K. Werner   +12 more
wiley   +1 more source

Long-term Periodicities of Cataclysmic Variables with Synoptic Surveys [PDF]

, 2017
A systematic study on the long-term periodicities of known Galactic cataclysmic variables (CVs) was conducted. Among 1580 known CVs, 344 sources were matched and extracted from the Palomar Transient Factory (PTF) data repository.
Chou, Yi, Djorgovski, Stanislav G., Donalek, Ciro, Drake, Andrew J., Graham, Matthew J., Hu, Chin-Ping, Kulkarni, Shrinivas R., Laher, Russ, Levitan, David, Mahabal, Ashish A., Ngeow, Chow-Choong, Prince, Thomas A., Su, Yi-Hao, Surace, Jason, Yang, Michael Ting-Chang   +14 more
core   +3 more sources

Large mammalian herbivores disrupt demographic compensation along an aridity gradient

Ecosphere, Volume 17, Issue 3, March 2026.
Abstract Ecologists often assume that demographic rates such as survival and reproduction vary in concert along abiotic gradients, but growing evidence suggests that these rates may change in opposition, leading to demographic compensation. However, it is unclear how biotic interactions such as herbivory may affect the presence or strength of ...
Aleah K. Querns, Jacob R. Goheen, Todd M. Palmer, Allison M. Louthan   +3 more
wiley   +1 more source

On the apsidal motion of BP Vulpeculae

, 2008
BP Vulpeculae is a bright eclipsing binary system showing apsidal motion. It was found in an earlier study that it shows retrograde apsidal motion which contradicts theory.
Agerer, Borkovits, Borkovits, Claret, Claret, Devor, Diethelm, E. Illés-Almár, Gimenez, Huth, Hübscher, Hübscher, Hübscher, Illés-Almár, Kwee, Lacy, Lacy, Lacy, Lacy, Lacy, Lacy, Lacy, Lacy, Lacy, Popper, Sz. Csizmadia, T. Borkovits, Torres, van Hamme, Zejda   +29 more
core   +1 more source

On the progenitor system of V392 Persei [PDF]

, 2018
A discussion regarding the progenitor system of the nova and dwarf nova system V392 Persei using archival data from 2MASS and WISE. We find that the system is unlikely to contain a luminous red giant donor (i.e.
Buczynski D., Cutri R. M., Cutri R. M., Darnley M. J., Darnley M. J., Downes R. A., Gaia Collaboration, Green G. M., Grezen G. M., Leadbeater R., Li K.-L., Lindegren L., Nakamura Y., Wagner R. M., Zwitter T.   +14 more
core   +2 more sources

The Neocolonial Tightening of CITES: How Northern Narratives Marginalize Southern Conservation

Conservation Letters, Volume 19, Issue 2, March/April 2026.
ABSTRACT CITES has demonstrated a persistent trend of regulatory tightening over five decades, raising critical questions about both equity and effectiveness in global conservation governance. This study examines how structural power imbalances and dominant Northern narratives within the Convention have systematically marginalized pluralistic ...
Youmin Lian, Md. Ziaul Islam
wiley   +1 more source

Variable stars in the globular cluster NGC 3201. I. Multimode SX Phe-type variables

, 2003
We report on the discovery of eleven multimode SX Phoenicis--type blue stragglers in the field of the southern globular cluster NGC 3201. In these variables both radial and non-radial modes are excited.
Krzeminski, W., Mazur, B., Thompson, I. B.   +2 more
core   +1 more source

Responses of African Savanna Trees to Large Herbivore Extinction and Rewilding

Ecology Letters, Volume 29, Issue 3, March 2026.
Trophic rewilding may be a restoration ‘win‐win’ if the return of extirpated wildlife also restores lost ecosystem function, but few studies have addressed whether wildlife reintroduction is capable of reversing changes that occurred during extirpation.
Tyler C. Coverdale, Mahesh Sankaran, Andrew B. Davies, Jayashree Ratnam, Benjamin J. Wigley, David J. Augustine   +5 more
wiley   +1 more source

A Gnawing Question: How Do Caribou and Other Arctic Mammals Exploit Shared Bone Resources?

Ecology and Evolution, Volume 16, Issue 2, February 2026.
Bones of dead animals are consumed by many species, yet the partitioning of this resource, and the associated ecological and evolutionary implications, remains poorly understood. Using bone modification features found on shed female caribou (Rangifer tarandus) antlers and skeletal bones lying on caribou calving grounds of the Arctic National Wildlife ...
Madison Gaetano, Eric Wald, Patrick Druckenmiller, Joshua H. Miller   +3 more
wiley   +1 more source

HT Camelopardalis: The simplest intermediate polar spin pulse

, 2005
The intermediate polar HT Cam is unusual in that it shows no evidence for dense absorption in its spectrum. We analyse an XMM-Newton observation of this star, which confirms the absence of absorption and shows that the X-ray spin-pulse is energy ...
Allan, Beardmore, Coel Hellier, Cropper, de Martino, de Martino, Evans, Hellier, Hellier, Hellier, Jansen, Kemp, Mason, Mason, Mukai, P. A. Evans, Patterson, Strüder, Taylor, Tovmassian, Turner, Warner   +21 more
core   +1 more source