Results 61 to 70 of about 512,862 (249)

Evidence of stellar oscillations in the post-common envelop binary candidate ASASSN-V J205543.90+240033.5

, 2023
ASASSN-V J205543.90+240033.5 (ASJ2055) is a possible post-common envelope binary system. Its optical photometric data shows an orbital variation about $0.52$~days and a fast period modulation of $P_0\sim 9.77$~minute, whose origin is unknown.
Hou, X., Hu, C. -P., Hui, C. Y., Kong, A. K. H., Li, K. L., Lin, L. C. -C., Mao, J., Song, F. F., Takata, J., Wang, X. F.   +9 more
core  

The apo LETM1 F‐EF‐hand adopts a closed conformation that underlies a multi‐modal sensory role in mitochondria

FEBS Letters, EarlyView.
We present the first solution structure of the Ca2+‐depleted LETM1 F‐EF‐hand through a D676A/N678A Ca2+ binding‐deficient mutant, revealing a closed hydrophobic cleft caused by a unique F1‐helix pivot. The apo LETM1 F‐EF‐hand exhibits regiospecific hot and cold unfolding, sensitivity to physiological pH changes and potential for promiscuous heterotypic
Qi‐Tong Lin, Danielle M. Colussi, Peter B. Stathopulos   +2 more
wiley   +1 more source

Long orbital period pre-polars containing an early K-type donor stars. Bottleneck accretion mechanism in action [PDF]

, 2016
We studied two objects identified as a Cataclysmic Variables (CVs) with periods exceeding the natural boundary for Roche lobe filling ZAMS secondary stars. We present observational results for V1082 Sgr with 20.82 h orbital period, an object that shows low luminosity state, when its flux is totally dominated by a chromospherically active K- star with ...
arxiv   +1 more source

Disks in the Arches cluster -- survival in a starburst environment [PDF]

, 2010
Deep Keck/NIRC2 HK'L' observations of the Arches cluster near the Galactic center reveal a significant population of near-infrared excess sources. We combine the L'-band excess observations with K'-band proper motions, to confirm cluster membership of ...
A. M. Ghez, A. Stolte, Alves, Armitage, Blum, Blum, C. Ballard, Carpenter, Cesaroni, Dahm, Dahm, Dahm, E. Mills, Fatuzzo, Figer, Figer, Figuerêdo, Figuerêdo, Ghez, Ghez, Haisch, Haisch, Hanson, Harayama, Hernández, Hernández, Hillenbrand, Hollenbach, Hornstein, J. R. Lu, K. Matthews, Kim, Kraus, Lada, Lada, Lang, Lu, Lu, M. R. Morris, Najarro, Richling, Richling, S. A. Wright, Sherry, Stolte, Stolte, Stolte, Stolte, T. Do, Takeuchi, Thompson   +50 more
core   +2 more sources

Distinct dysregulated pathways in sporadic and Lynch syndrome‐associated colorectal cancer offer insights for targeted treatment

FEBS Letters, EarlyView.
This study explores the distinct molecular mechanisms underlying Lynch syndrome‐associated and sporadic colorectal cancer (CRC). By highlighting the therapeutic potential of targeting the PI3K‐Akt pathway in Lynch syndrome‐associated CRC and the Wnt pathway in sporadic CRC, the findings open avenues for personalised treatment strategies, aiming to ...
May J. Krause, Musalula Sinkala, Raj Ramesar   +2 more
wiley   +1 more source

Exoplanet Aeronomy: A Case Study of WASP-69 b’s Variable Thermosphere

The Astronomical Journal
Aeronomy, the study of Earth’s upper atmosphere and its interaction with the local space environment, has long traced changes in the thermospheres of Earth and other solar system planets to solar variability in the X-ray and extreme-ultraviolet ...
W. Garrett Levine, Shreyas Vissapragada, Adina D. Feinstein, George W. King, Aleck Hernandez, Lía Corrales, Michael Greklek-McKeon, Heather A. Knutson   +7 more
doaj   +1 more source

New debris disk candidates: 24 micron stellar excesses at 100 Myr

, 2004
Sixty three members of the 100 Myr old open cluster M47 (NGC 2422) have been detected at 24 micron with Spitzer. The Be star V 378 Pup shows an excess both in the near-infrared and at 24 micron (K-[24] = 2.4 mag), probably due to free-free emission from ...
Alberto Noriega‐Crespo, Chad W. Engelbracht, Dean C. Hines, Deborah L. Padgett, Dougherty S. M., Erick T. Young, George H. Rieke, Hog E., Ishmukhamedov K., James Muzerolle, Jane E. Morrison, Joannah C. Hinz, John A. Stansberry, Karl D. Gordon, Karl R. Stapelfeldt, Kate Y. L. Su, Kharchenko N. V., Luisa Rebull, Mermilliod J.-C., Nadya Gorlova, Nissen P. E., Oudmaijer R. D., Robichon N., Rojo Arellano E., Shobbrook R. R., van Rensbergen W., Waters L. B. F. M.   +26 more
core   +1 more source

The multiple roles of the NlpC_P60 peptidase family in mycobacteria – an underexplored target for antimicrobial drug discovery

FEBS Letters, EarlyView.
The NlpC_P60 superfamily of peptidases is recognised by its key role in bacterial cell wall homeostasis. Recently, studies have also described the involvement of NlpC_P60‐like enzymes in bacterial competitive mechanisms and pathogenesis across several lineages.
Catharina dos Santos Silva, Marcio Vinicius Bertacine Dias   +1 more
wiley   +1 more source

Statistics and Habitability of F-type Star–Planet Systems

The Astrophysical Journal Supplement Series
F-type star–planet systems represent an intriguing case for habitability studies. Although F-type stars spend considerably less time on the main sequence (MS) than G-, K-, and M-type stars, they still offer a unique set of features, allowing for the ...
Shaan D. Patel, Manfred Cuntz, Nevin N. Weinberg   +2 more
doaj   +1 more source

SOAR-OSIRIS observations of the Sh 2-307 HII region: Triggered star formation beyond the solar circle

, 2009
This work aims to the study of the Sh 2-307 HII region and related stellar population. Near-infrared imaging and spectroscopic observations in the direction of Sh 2-307 were performed using OSIRIS at SOAR Telescope.
A. Roman-Lopes, Ali, Baraffe, Blum, Casali, Churchwell, Dutra, Elmegreen, Fitzpatrick, Garcia-Segura, Haisch, Han, Hanson, Hanson, Hanson, Hoffmeister, Hunter, Ivanov, Kim, Koornneef, Lada, Lada, Lefloch, Maiz-Apellaniz, Martins, Meyer, Meynet, Moffat, Palla, Roman-Lopes, Roman-Lopes, Russeil, Salpeter, Scalo, Sharpless, Siess, Spitzer, Stetson, Tenorio-Tagle, Urquhart, Walborn, Wegner, Wood   +42 more
core   +1 more source