Results 91 to 100 of about 451,529 (372)

Nothing to hide: An X-ray survey for young stellar objects in the Pipe Nebula

, 2010
We have previously analyzed sensitive mid-infrared observations to establish that the Pipe Nebula has a very low star-formation efficiency. That study focused on YSOs with excess infrared emission (i.e, protostars and pre-main sequence stars with disks),
Agüeros, Bettina Posselt, Brooke, Charles J. Lada, Cieza, Covey, Feigelson, Forbrich, Jan Forbrich, Kenyon, Kevin R. Covey, Lada, Lasker, Muench, Mukai, Neuhäuser, Padgett, Preibisch, Rathborne, Robitaille, Voges, Voges   +21 more
core   +1 more source

Insights into PI3K/AKT signaling in B cell development and chronic lymphocytic leukemia

FEBS Letters, EarlyView.
This Review explores how the phosphoinositide 3‐kinase and protein kinase B pathway shapes B cell development and drives chronic lymphocytic leukemia, a common blood cancer. It examines how signaling levels affect disease progression, addresses treatment challenges, and introduces novel experimental strategies to improve therapies and patient outcomes.
Maike Buchner
wiley   +1 more source

The Effects of Binary Stars on the Color-Magnitude Diagrams of Young-Age Massive Star Clusters [PDF]

, 2018
Extended main-sequence turnoffs (eMSTO) have been observed in the color-magnitude diagram (CMD) of intermediate-age and young star clusters. The origin of the eMSTO phenomenon is still highly debated. Calculations show that the blue and faint (BF) stars in the CMD of NGC 1866 are hydrogen main sequence (MS) + naked He star systems.
arxiv   +1 more source

Early-type objects in NGC6611 and Eagle Nebula [PDF]

, 2008
An important question about Be stars is whether Be stars are born as Be stars or not. It is necessary to observe young clusters to answer this question. Observations of stars in NGC6611 and the star-formation region of Eagle Nebula have been carried out ...
A. M. Hubert, Alecian, Allen, Baade, Bastien, Belikov, Bertin, C. Martayan, C. Neiner, Castelli, Currie, D. Baade, de Winter, Duchêne, Dufton, Evans, Fabregat, Finkenzeller, Frémat, Herbig, Herbig, Hernández, Hillenbrand, Huang, Hubeny, Iben, Indebetouw, J. Fabregat, M. Floquet, Martayan, Martayan, Martayan, Meynet, Ogura, Palla, Pasquini, Porter, Santos, Schaller, Sicilia-Aguilar, The, Tucholke, Vieira, Walker, Y. Frémat, Zorec   +45 more
core   +5 more sources

Revisiting Hipparcos data for pre-main sequence stars [PDF]

, 1999
We cross-correlate the Herbig & Bell and Hipparcos Catalogues in order to extract the results for young stellar objects (YSOs). We compare the distances of individual young stars and the distance of their presumably associated molecular clouds, taking into account post-Hipparcos distances to the relevant associations and using Hipparcos ...
Bertout, C., Robichon, N., Arenou, Frédéric   +2 more
openaire   +4 more sources

The pre-main-sequence star IP Persei [PDF]

Astronomy & Astrophysics, 2001
We present the results of high- and low-resolution spectroscopic and broadband multicolour photometric observations of the emission-line A-type star IP Per. Significant variations of the Balmer line profiles and near-IR brightness are detected.
E. L. Chentsov, E. L. Chentsov, V. G. Klochkova, V. G. Klochkova, Pedro García-Lario, Anatoly S. Miroshnichenko, Anatoly S. Miroshnichenko, Richard O. Gray, J. V. Perea Calderón, Karen S. Bjorkman   +9 more
openaire   +2 more sources

Insights into the renal pathophysiology in Hermansky‐Pudlak syndrome‐1 from urinary extracellular vesicle proteomics and a new mouse model

FEBS Letters, EarlyView.
Hermansky‐Pudlak syndrome type 1 (HPS‐1) is a rare, autosomal recessive disorder with poorly understood renal involvement. Urinary extracellular vesicle (uEV) proteomics and a novel Hps1 mouse model reveal mitochondrial abnormalities and lipid accumulation in HPS‐1 kidney proximal tubule cells. Serum ApoA1 correlates with kidney function in our patient
Dawn M. Maynard, Bernadette R. Gochuico, Hadass Pri Chen, Christopher K. E. Bleck, Patricia M. Zerfas, Wendy J. Introne, William A. Gahl, May C. V. Malicdan   +7 more
wiley   +1 more source

Simultaneous Far-ultraviolet and Near-ultraviolet Observations of T Tauri Stars with UVIT/AstroSat: Probing the Accretion Process in Young Stars

The Astrophysical Journal
We present results from simultaneous far-ultraviolet (FUV) and near-ultraviolet (NUV) observations of T Tauri stars (TTSs) in the Taurus molecular cloud with UVIT/AstroSat. This is the very first UVIT study of TTSs.
Prasanta K. Nayak, Mayank Narang, P. Manoj, Uma Gorti, Annapurni Subramaniam, Nayana George, Chayan Mondal   +6 more
doaj   +1 more source

Star Formation in the Ultraviolet

Galaxies, 2020
With the launch of JWST and the upcoming installation of extremely large telescopes, the first galaxies in our Universe will finally be revealed.
Jorick S. Vink
doaj   +1 more source

Comparing the observational instability regions for pulsating pre-main sequence and classical $δ$ Scuti stars [PDF]

, 2007
A comparison of the hot and cool boundaries of the classical instability strip with observations has been an important test for stellar structure and evolution models of post- and main sequence stars. Over the last few years, the number of pulsating pre-main sequence (PMS) stars has increased significantly: 36 PMS pulsators and candidates are known as ...
arxiv   +1 more source