Results 121 to 130 of about 226,792 (352)

Quiescent H2 Emission From Pre-Main Sequence Stars in Chamaeleon I [PDF]

, 2008
We report the discovery of quiescent emission from molecular hydrogen gas located in the circumstellar disks of six pre-main sequence stars, including two weak-line T Tauri stars (TTS), and one Herbig AeBe star, in the Chamaeleon I star forming region ...
Appenzeller I., Chelli A., David A. Weintraub, Itoh Y., Jarron M. Leisenring, Jeffrey S. Bary, Joel H. Kastner, Lawson W. A., Persi P., Prusti T., Reipurth B., Sonali J. Shukla   +11 more
core   +3 more sources

IN-SYNC I: HOMOGENEOUS STELLAR PARAMETERS FROM HIGH-RESOLUTION APOGEE SPECTRA FOR THOUSANDS OF PRE-MAIN SEQUENCE STARS [PDF]

, 2014
Over two years, 8859 high-resolution H-band spectra of 3493 young (1–10 Myr) stars were gathered by the multi-object spectrograph of the APOGEE project as part of the IN-SYNC ancillary program of the SDSS-III survey.
M. Cottaar, K. Covey, M. Meyer, D. Nidever, K. Stassun, J. Foster, J. Tan, S. Chojnowski, N. D. Rio, K. Flaherty, P. Frinchaboy, M. Skrutskie, S. Majewski, John C. Wilson, G. Zasowski   +14 more
semanticscholar   +1 more source

Combined spatially resolved metabolomics and spatial transcriptomics reveal the mechanism of RACK1‐mediated fatty acid synthesis

Molecular Oncology, EarlyView.
The authors analyzed the spatial distributions of gene and metabolite profiles in cervical cancer through spatial transcriptomic and spatially resolved metabolomic techniques. Pivotal genes and metabolites within these cases were then identified and validated.
Lixiu Xu, Jinqiu Li, Junqi Ma, Ayshamgul Hasim   +3 more
wiley   +1 more source

Effect of Time-varying X-Ray Emission from Stellar Flares on the Ionization of Protoplanetary Disks

The Astrophysical Journal
X-rays have significant impacts on cold, weakly ionized protoplanetary disks by increasing the ionization rate and driving chemical reactions. Stellar flares are explosions that emit intense X-rays and are the unique source of hard X-rays with an energy ...
Haruka Washinoue, Shinsuke Takasao, Kenji Furuya   +2 more
doaj   +1 more source

Low-mass pre--main-sequence stars in the Magellanic Clouds

, 2012
[Abridged] The stellar Initial Mass Function (IMF) suggests that sub-solar stars form in very large numbers. Most attractive places for catching low-mass star formation in the act are young stellar clusters and associations, still (half-)embedded in star-
A. Chieffi, A. Duquennoy, A. Nota, A. Sicilia-Aguilar, A. Stolte, A. Vallenari, A.E. Piskunov, A.L. Kraus, A.Z. Bonanos, B. Brandl, B. Brandl, B. Burningham, B. Merín, B.A. Whitney, B.E. Westerlund, C. Briceño, C. Briceño, C. Lada, C.-H.R. Chen, C.A. Iglesias, C.A. Tout, C.F. Prosser, C.J. Evans, C.J. Evans, C.J. Lada, C.J. Lada, C.J. Lada, D. Gouliermis, D. Marquardt, D.A. Gouliermis, D.A. Gouliermis, D.A. Gouliermis, D.A. Gouliermis, D.A. Gouliermis, Dimitrios A. Gouliermis, E. Hennekemper, E. Mentuch, E. Sabbi, E. Sabbi, E. Sabbi, E. Tognelli, E.E. Salpeter, F. Allard, F. Damiani, F. Palla, F.J. Rogers, F.J. Swenson, G. Baume, G. Chabrier, G. Marchi De, G. Marchi De, G. Marchi De, H. Karttunen, H. Zinnecker, H.B. Throop, I. Appenzeller, I. Baraffe, I. Baraffe, I. Baraffe, I. Hunter, J. Maíz Apellániz, J. Scalo, J. Woitas, J.B. Hutchings, J.H.J. Bruijne de, J.M. Scalo, J.W. Ferguson, K. Levenberg, K.A. Venn, K.D. Gordon, K.G. Henize, L. Girardi, L. Hartmann, L. Hartmann, L. Origlia, L. Siess, L. Siess, L.A. Hillenbrand, L.A. Hillenbrand, L.A. Hillenbrand, L.A. Hillenbrand, L.A. Hillenbrand, L.B.F.M. Waters, L.R. Carlson, L.R. Carlson, L.W. Hartmann, M. Abramowitz, M. Asplund, M. Cignoni, M. Cignoni, M. Cignoni, M. Gennaro, M. Heydari-Malayeri, M. Robberto, M. Romaniello, M. Romaniello, M. Schmalzl, M. Sewiło, M. Sirianni, M.G. Guarcello, M.G. Petr, M.R. Mokiem, M.S. Povich, N. Bastian, N. Calvet, N. Panagia, N. Rio Da, N. Rio Da, N. Rio Da, N.R. Walborn, N.R. Walborn, P. Battinelli, P. Kroupa, P. Kroupa, P. Madau, P. Massey, P. Massey, P. Massey, P.B. Lucke, P.H. Hauschildt, Q. Liu, Q. Liu, R. Castro, R. Kurucz, R. Köhler, R.A. Gruendl, R.D. Jeffries, R.D. Jeffries, R.D. Mathieu, R.E. Luck, R.J. Allison, S. Degl’Innocenti, S. Ragland, S. Schmeja, S. Stanimirović, S. Yi, S.C. Javiel, S.J. Kenyon, S.P. Littlefair, S.W. Stahler, T. Naylor, T. Preibisch, T. Preibisch, T.A. Smecker-Hane, T.P. Robitaille, Th. Preibisch, W. Brandner, W. Brandner, W. Herbst, W. Herbst, W.H. Sherry, X. Pang, Y.C. Pei   +152 more
core   +1 more source

X-Rays in the Orion Nebula Cluster: Constraints on the Origins of Magnetic Activity in Pre-Main-Sequence Stars [PDF]

, 2002
A recent observation of the Orion Nebula Cluster with the ACIS instrument on board the Chandra X-Ray Observatory detected 1075 sources, 525 of which are pre-main-sequence (PMS) stars with measured bulk properties such as bolometric luminosities, masses ...
E. Feigelson, James A. Gaffney III, G. Garmire, L. Hillenbrand, L. Townsley   +4 more
semanticscholar   +1 more source

Addressing persistent challenges in digital image analysis of cancer tissue: resources developed from a hackathon

Molecular Oncology, EarlyView.
Large multidimensional digital images of cancer tissue are becoming prolific, but many challenges exist to automatically extract relevant information from them using computational tools. We describe publicly available resources that have been developed jointly by expert and non‐expert computational biologists working together during a virtual hackathon
Sandhya Prabhakaran, Clarence Yapp, Gregory J. Baker, Johanna Beyer, Young Hwan Chang, Allison L. Creason, Robert Krueger, Jeremy Muhlich, Nathan Heath Patterson, Kevin Sidak, Damir Sudar, Adam J. Taylor, Luke Ternes, Jakob Troidl, Xie Yubin, Artem Sokolov, Darren R. Tyson   +16 more
wiley   +1 more source

Chemically peculiar stars on the pre-main sequence

Astronomy & Astrophysics
Context. The chemically peculiar (CP) stars of the upper main sequence are defined by spectral peculiarities that indicate unusual elemental abundance patterns in the presence of diffusion in the calm, stellar atmospheres. Some of them have a stable local magnetic field of up to several kiloGauss.
L. Kueß, E. Paunzen, N. Faltová, D. Jadlovský, M. Labaj, M. Mesarč, P. Mondal, M. Prišegen, T. Ramezani, J. Supíková, K. Svačinková, M. Vítková, C. Xia, K. Bernhard, S. Hümmerich   +14 more
openaire   +3 more sources

Detection rate for ESR1 mutations is higher in circulating‐tumor‐cell‐derived genomic DNA than in paired plasma cell‐free DNA samples as revealed by ddPCR

Molecular Oncology, EarlyView.
Analysis of ESR1 mutations in plasma cell‐free DNA (cfDNA) is highly important for the selection of treatment in patients with breast cancer. Using multiplex‐ddPCR and identical blood draws, we investigated whether circulating tumor cells (CTCs) and cfDNA provide similar or complementary information for ESR1 mutations.
Stavroula Smilkou, Aliki Ntzifa, Victoria Tserpeli, Ioanna Balgkouranidou, Alkistis Papatheodoridi, Evangelia Razis, Helena Linardou, Christos Papadimitriou, Amanda Psyrri, Flora Zagouri, Stylianos Kakolyris, Evi Lianidou   +11 more
wiley   +1 more source

Spatial distribution of pre-main sequence stars in Taurus.

, 1993
We derive characteristic properties of the nonrandom spatial distribution of pre-main-sequence stars in the Taurus-Auriga molecular cloud by applying several different statistical techniques.
M. Gómez, L. Hartmann, S. Kenyon, R. Hewett   +3 more
semanticscholar   +1 more source