Results 31 to 40 of about 549,270 (251)

Lately Exposed Amorphous Water Ice on Comet 49P/Arend-Rigaux

, 2014
Comet 49P/ Arend-Rigaux, thought to be a low activity comet since the 1980's was found to be active in its recent apparitions. Recent analysis of the data obtained from Spitzer observation of the comet in 2006 compared with laboratory spectra has ...
Arora, S., Ganesh, S., Kalyaan, A., Sivaraman, B., Venkataraman, V.   +4 more
core   +1 more source

ON COLLISION OF SECONDARY NUCLEI OF COMET P/SHOEMAKER-LEVI 9 (1993E) WITH JUPITER

Odessa Astronomical Publications, 2017
In July 1994 the comet P/Shoemaker-Levi which in July 1992 split in the Roche lobe of Jupiter onto 21 fragments, then collided with Jupiter at the altitude near – 45°.
K. I. Churyumov, V. G. Kruchinenko
doaj   +1 more source

Splitting of Long-period Comet C/2018 F4 (PANSTARRS)

The Astronomical Journal, 2023
Long-period comet C/2018 F4 (PANSTARRS) was observed to show duplicity of its inner region in 2020 September, suggestive of a splitting event. We here present analyses of our observations of the comet taken from the LCO Outbursting Objects Key project ...
Man-To Hui, Michael S. P. Kelley, Denise Hung, Tim Lister, Joseph Chatelain, Edward Gomez, Sarah Greenstreet   +6 more
doaj   +1 more source

DMAP1 Deficiency Suppresses Lung Cancer Progression by Destabilizing Replication Fork and Activating IFN Signaling‐Mediated Anti‐tumor Immunity

Advanced Science, EarlyView.
Lung cancer remains the leading cause of cancer‐related death. We investigated the role of the epigenetic regulator DMAP1 in NSCLC and found that its loss induces replication stress and DNA damage. This in turn activates type I IFN signaling via the cGAS–STING pathway and transcriptional ISG de‐repression, enhancing anti‐tumor immune responses ...
Kan Huang, Xi Dai, Shuaihu Li, Yingxue Chen, Yaxin Yu, Lin Wang, Kun Liu, Shuhan Lyu, Chongyang Li, Yihua Sun, Fei Li   +10 more
wiley   +1 more source

Conditions for the formation of anomalous tail of comet

Open Astronomy, 2019
The time and velocity of ejection of dust particles of anomalous tails from cometary nuclei are determined. It is revealed that some comets cause the formation of an anomalous tail is the collision of their comet nucleus with other bodies of the Solar ...
Safarov Abduljalol G., Ibadinov Khursand I.   +1 more
doaj   +1 more source

How primordial is the structure of comet 67P/C-G? Combined collisional and dynamical models suggest a late formation [PDF]

, 2016
There is an active debate about whether the properties of comets as observed today are primordial or, alternatively, if they are a result of collisional evolution or other processes.
Benz, W., Brasser, R., Jutzi, M., Morbidelli, A., Toliou, A.   +4 more
core   +2 more sources

SMAD4 Palmitoylation Drives a Metabolic‐Transcriptional Circuit to Promote Tumorigenesis and Confers Radiosensitivity in Pancreatic Cancer

Advanced Science, EarlyView.
This study identifies palmitoylation as a novel regulatory modification of SMAD4, mediated by ZDHHC22/APT2. It activates fatty acid synthesis, creating a self‐reinforcing SMAD4–FASN–palmitate feedback loop that drives pancreatic cancer growth and enhances radiotherapy sensitivity.
Yang Wang, Shan Zhang, Junping Bai, Xiaobing Li, Yi Han, Min Ji, Chongyi Jiang, Xiaobei Ge, Tianyu Yu, Yongying Hou, Jun Zhang, Wangting Li, Yiran Song, Jiaying Cai, Yingqun Zhou, Liwei An, Feng Wang   +16 more
wiley   +1 more source

On the role of collisions with meteoroids in splitting and acceleration of heliocentric velocity of comets

Open Astronomy, 2020
The hypothesis on the role of the meteoroid impacts in the comet nuclei splitting as well as acceleration of their heliocentric velocity are considered.
Guliyev Ayyub, Guliyev Rustam
doaj   +1 more source

The shape evolution of cometary nuclei via anisotropic mass loss

, 2018
Context. Breathtaking imagery recorded during the European Space Agency's Rosetta mission confirmed the bilobate nature of comet 67P/Churyumov-Gerasimenko's nucleus. Its peculiar appearance is not unique among comets.
Eggl, S., Medvedev, Yu. D., Vavilov, D. E., Zatitskiy, P. B.   +3 more
core   +1 more source

Testing the comet nature of main belt comets. The spectra of 133P/Elst-Pizarro and 176P/LINEAR [PDF]

, 2011
We present the visible spectrum of MBCs 133P/Elst-Pizarro and 176P/LINEAR, as well as three Themis family asteroids: (62) Erato, (379), Huenna and (383) Janina, obtained in 2007 using three telescopes at "El Roque de los Muchachos"' Observatory, in La ...
A’Hearn, Bagnulo, Bell, Boehnhardt, Bottke, Campins, Campins, Campins, Campins, Campins, Campins, Carusi, Chamberlin, Clark, Cunningham, de León, de León, Delbó, Delbó, Emery, Fernández, Fernández, Fernández, Fernández, Festou, Florczak, G. P. Tozzi, Groussin, Gustafson, H. Boehnhardt, H. Campins, Haghighipour, Harris, Hsieh, Hsieh, Hsieh, Hsieh, Ivezic, J. de León, J. Licandro, Jakosky, Jewitt, Keihm, Kidger, Kosai, Kraemer, Kresak, Kührt, Lamy, Landolt, Levison, Levison, Licandro, Licandro, Licandro, Makovoz, Marzari, Meng, Mothe-Diniz, Mottl, Müller, N. Pinilla-Alonso, Nesvorny, O. R. Hainaut, Ohtsuka, Osip, Reach, Rivkin, Rousselot, Schleicher, Schorghofer, Snodgrass, Spencer, Tanga, Toth, Williams, Zappalà   +76 more
core   +3 more sources