Results 71 to 80 of about 199,190 (345)

Star Clusters in Quasars: Bloated Stars as Broad Emission Line Clouds [PDF]

Symposium - International Astronomical Union, 1989
Many scenarios of the evolution of star clusters in the centers of galaxies involve the formation of a central supermassive object. Since black hole formation is not 100% efficient in mass usage, stars are left over. This paper investigates the properties of such stars and proposes that their externally heated atmospheres become “bloated” due to ...
openaire   +1 more source

Mass Outflow and Chromospheric Activity of Red Giant Stars in Globular Clusters I: M15

, 2008
High resolution spectra of 110 selected red giant stars in the globular cluster M15 (NGC 7078) were obtained with Hectochelle at the MMT telescope in 2005 May, 2006 May, and 2006 October. Echelle orders containing Halpha and Ca H & K are used to identify
Dupree, A. K., Meszaros, Sz., Szentgyorgyi, A.   +2 more
core   +1 more source

Correlation of the differential expression of PIK3R1 and its spliced variant, p55α, in pan‐cancer

Molecular Oncology, EarlyView.
PIK3R1 undergoes alternative splicing to generate the isoforms, p85α and p55α. By combining large patient datasets with laboratory experiments, we show that PIK3R1 spliced variants shape cancer behavior. While tumors lose the protective p85α isoform, p55α is overexpressed, changes linked to poorer survival and more pronounced in African American ...
Ishita Gupta, Yang Song, Madeleine Ndahayo, Anirudh Saxena, Theresa Guo, Dylan Z. Kelley, Jessica Gore, Andrew Hennigan, Alexa Anderson, John C. Papadimitriou, Daria A. Gaykalova   +10 more
wiley   +1 more source

A Closer Look at the Origin of LINER Emission in Later-type Galaxies and Its Connection to Evolved Stars with a Machine Learning Classification Scheme

The Astrophysical Journal
Identifying the dominant ionizing sources in galaxies is essential for understanding their formation and evolution. Traditionally, spectra are classified based on their dominant ionizing source using strong emission lines and Baldwin, Phillips ...
Ahmad Nemer, Ivan Yu. Katkov, Joseph D. Gelfand, Changhyun Cho   +3 more
doaj   +1 more source

The Effect of Viscosity on the Temperature of Ae Star Disks

Galaxies
This study explores the impact of viscous heating on decretion disks around Classical Ae (CAe) stars, with a focus on modeling the disk’s thermal structure.
R. Anusha, T. A. A. Sigut
doaj   +1 more source

Two-micron spectrophotometry of the galaxy NGC 253 [PDF]

, 1979
A very strong Brackett-gamma hydrogen emission line, and the 2.3 micron CO stellar absorption feature were measured in NGC 253. The presence and strength of the CO feature indicates that late type giant stars produce most of the 2.2 micron continuum ...
Becklin, E. E., Matthews, K., Neugebauer, G., Wynn-Williams, C. G.   +3 more
core   +1 more source

Probing the mass loss history of carbon stars using CO line and dust continuum emission [PDF]

, 2002
An extensive modelling of CO line emission from the circumstellar envelopes around a number of carbon stars is performed. By combining radio observations and infrared observations obtained by ISO the circumstellar envelope characteristics are probed over
Olofsson, H., Ryde, N., Schoeier, F. L.
core   +3 more sources

Identification of serum protein biomarkers for pre‐cancerous lesions associated with pancreatic ductal adenocarcinoma

Molecular Oncology, EarlyView.
This work identified serum proteins associated with pancreatic epithelial neoplasms (PanINs) and early‐stage PDAC. Proteomics screens assessed genetically engineered mice with abundant PanINs, KPC mice (Lox‐STOP‐Lox‐KrasG12D/+ Lox‐STOP‐Lox‐Trp53R172H/+ Pdx1‐Cre) before PDAC development and also early‐stage PDAC patients (n = 31), compared to benign ...
Hannah Mearns, Jaclyn S. Long, Sergio Lilla, Kelly Hodge, Marcus J. G. W. Ladds, Colin Nixon, Paula Fernández‐Palanca, Sara Zanivan, Pilar Acedo, Stephen P. Pereira, Kevin M. Ryan   +10 more
wiley   +1 more source

Dynamical Masses and Radiative Transfer Modeling of HD 698: A Be Binary in Evolutionary Transition

The Astrophysical Journal
We present a detailed analysis of the early post-mass-transfer binary system HD 698 (V742 Cas), combining high-resolution optical spectroscopy, long-baseline interferometry, and radiative transfer modeling.
Ilfa A. Gabitova, Alex C. Carciofi, Tajan H. de Amorim, Mark Suffak, Anatoly S. Miroshnichenko, Sergey V. Zharikov, Amanda C. Rubio, Steve Danford, Alicia N. Aarnio, Peter Prendergast, Richard J. Rudy, Richard C. Puetter, R. Brad Perry, Aldiyar T. Agishev, Nadezhda L. Vaidman, Serik A. Khokhlov   +15 more
doaj   +1 more source

Pre-main-sequence stars in the young open cluster NGC 1893: II. Evidence for triggered massive star formation

, 2007
(Abridged) The open cluster NGC 1893, illuminating the HII region IC410, contains a moderately large population of O-type stars and is one of the youngest clusters observable in the optical range.
A. Marco, Bernabei, Campbell, Cardelli, Comerón, Cuffey, Deharveng, Ducati, Elmegreen, Fitzsimmons, Franco, G. Bernabeu, G. L. Israel, Gaze, Girardi, Hanson, Herbig, Hester, Hillenbrand, Humphreys, I. Negueruela, Indebetouw, Ishii, Jones, Kohoutek, Kroupa, Leisawitz, Leonard, Marco, Marco, Martins, Massey, Mathys, Maíz-Apellániz, Meynet, Negueruela, Pflamm-Altenburg, Rieke, Siess, Skrutskie, Steele, Tapia, Vallenari, Walborn, Walborn, Walborn, Walborn, Wegner, Yadav, Zavagno   +49 more
core   +1 more source