Results 31 to 40 of about 508,501 (339)

Modes of Multiple Star Formation [PDF]

The Astrophysical Journal, 2001
This paper argues that star forming environments should be classified into finer divisions than the traditional isolated and clustered modes. Using the observed set of galactic open clusters and theoretical considerations regarding cluster formation, we estimate the fraction of star formation that takes place within clusters. We find that less than 10%
Philip C. Myers, Fred C. Adams
openaire   +4 more sources

Precision Astrometry of a Sample of Speckle Binaries and Multiples with the Adaptive Optics Facilities at the Hale and Keck II Telescopes [PDF]

, 2009
Using the adaptive optics facilities at the 200-in Hale and 10-m Keck II, we observed in the near infrared a sample of 12 binary and multiple stars and one open cluster. We used the near diffraction limited images of these systems to measure the relative
Al-Shukri, Barstow, Benedict, Benedict, Cameron, Cutri, Delfosse, Dommanget, Dvorak, Eggenberger, Eisenhauer, Fischer, Han, Harmanec, Hayward, Heintz, Henry, He��miniak, Holman, J. Eisner, Jenkins, K. G. He��miniak, Lane, Launhardt, Law, Lissauer, M. Konacki, Metchev, Metchev, Mugrauer, Muterspaugh, Nelson, Neuh��user, Oppenheimer, Perryman, Pravdo, Pravdo, Raghavan, Reid, Roe, Roeser, R��ll, S. R. Kulkarni, Sahlmann, Simon, Simons, Stetson, S��derhjelm, Thompson, Unwin, Zapatero Osorio   +50 more
core   +2 more sources

A New Catalog of Am-type Chemically Peculiar Stars Based on LAMOST

The Astrophysical Journal Supplement Series, 2023
A total of about 21,600 Am candidates were detected with the MKCLASS code based on the low-resolution spectra of the Large Sky Area Multi-Object Fiber Spectroscopic Telescope Data Releases 8 (v1.0), 9 (v0), and 10 (v0), which greatly expands the database
Xiao-man Tian, Zhi-hua Wang, Li-ying Zhu, Xiao-Ling Yang   +3 more
doaj   +1 more source

A Survey of Herbig Ae/Be Multiplicity

The Astronomical Journal, 2023
Although the majority of Herbig Ae/Be (HAEBE) stars are likely multiple systems, relatively few multiples have been identified. We aim to create a statistically significant survey of HAEBE multiplicity as a function of stellar mass, to shed light on ...
S. J. Thomas, B. Rodgers, N. S. van der Bliek, G. Doppmann, J. Bouvier, C. Araya Salvo, J.-L. Beuzit, F. Rigaut   +7 more
doaj   +1 more source

The COMBS survey I : Chemical Origins of Metal-Poor Stars in the Galactic Bulge [PDF]

, 2019
19 pages, 5 tables, accepted to MNRASChemistry and kinematic studies can determine the origins of stellar population across the Milky Way. The metallicity distribution function of the bulge indicates that it comprises multiple populations, the more metal-
Asplund, Martin, Bensby, Thomas, Casagrande, Luca, Feltzing, Sofia, Freeman, Kenneth C., Hawkins, Keith, Kobayashi, Chiaki, Lucey, Madeline, Marino, Anna F., Ness, Melissa   +9 more
core   +3 more sources

CCD measurements of double and multiple stars at NAO Rozhen [PDF]

Serbian Astronomical Journal, 2005
With the 2-m telescope of the Bulgarian National Astronomical Observatory at Rozhen observations of fifteen multiple stars were carried out during one night - October 17/18, 2004.
Pavlović Rade M., Cvetković Zorica D., Olević Dragomir M., Strigachev A., Popović Georgije M., Novaković B.   +5 more
doaj   +1 more source

Intellectual capital and productivity of managers: The case study of hotel industry in Serbia

BizInfo, 2022
Intellectual capital is the part of intangible assets that affects value creation. Intellectual capital includes human capital, structural capital, and customer capital.
Jasmina Ognjanović, Marija Mandarić, Dejan Sekulić   +2 more
doaj   +1 more source

Spectroscopic Orbits of Subsystems in Multiple Stars. III. [PDF]

The Astronomical Journal, 2018
Abstract Spectroscopic orbits are determined for inner subsystems in nine stellar hierarchies (HIP 2863, 4974, 8353, 28796, 35261, 92929, 115272, 115552, and 117596). Their periods range from 2.5 to 312 days. For each system, estimates of masses, orbital inclination, and other parameters are given.
Andreï Tokovinin
openalex   +13 more sources

On the Ramsey multiplicity for stars

Discrete Mathematics, 1982
AbstractIn 1929, Ramsey proved a theorem guaranteeing that if G1,G2,…,Gk are graphs, then there exists an integer r so that if the edges of Kr are colored in any fashion with k colors a monochromatic Gi in color i exists for some i. Harary and Prins suggested the problem of deciding the minimum number of monochromatic Gi in any such coloring. It is the
openaire   +2 more sources

Multiple star systems in the Orion nebula [PDF]

Astronomy & Astrophysics, 2018
This work presents an interferometric study of the massive-binary fraction in the Orion Trapezium cluster with the recently comissioned GRAVITY instrument. We observed a total of 16 stars of mainly OB spectral type. We find three previously unknown companions for θ1 Ori B, θ2 Ori B, and θ2 Ori C.
GRAVITY collaboration, Karl, Martina, Pfuhl, Oliver, Eisenhauer, Frank, Genzel, Reinhard, Grellmann, Rebekka, Habibi, Maryam, Abuter, Roberto, Accardo, Matteo, Amorim, António, Anugu, Narsireddy, Ávila, Gerardo, Benisty, Myriam, Berger, Jean-Philippe, Bland, Nicolas, Bonnet, Henri, Bourget, Pierre, Brandner, Wolfgang, Brast, Roland, Buron, Alexander, Garatti, Alessio Caratti o, Chapron, Frédéric, Clénet, Yann, Collin, Claude, Foresto, Vincent Coudé du, de Wit, Willem-Jan, de Zeeuw, Tim, Deen, Casey, Delplancke-Ströbele, Françoise, Dembet, Roderick, Derie, Frédéric, Dexter, Jason, Duvert, Gilles, Ebert, Monica, Eckart, Andreas, Esselborn, Michael, Fédou, Pierre, Finger, Gert, Garcia, Paulo, Dabo, Cesar Enrique Garcia, Lopez, Rebeca Garcia, Gao, Feng, Gandron, Éric, Gillessen, Stefan, Gonté, Frédéric, Gordo, Paulo, Grözinger, Ulrich, Guajardo, Patricia, Guieu, Sylvain, Haguenauer, Pierre, Hans, Oliver, Haubois, Xavier, Haug, Marcus, Haußmann, Frank, Henning, Thomas, Hippler, Stefan, Horrobin, Matthew, Huber, Armin, Hubert, Zoltan, Hubin, Norbert, Hummel, Christian A., Jakob, Gerd, Jochum, Lieselotte, Jocou, Laurent, Kaufer, Andreas, Kellner, Stefan, Kandrew, Sarah, Kern, Lothar, Kervella, Pierre, Kiekebusch, Mario, Klein, Ralf, Köhler, Rainer, Kolb, Johan, Kulas, Martin, Lacour, Sylvestre, Lapeyrère, Vincent, Lazareff, Bernard, Bouquin, Jean-Baptiste Le, Léna, Pierre, Lenzen, Rainer, Lévêque, Samuel, Lin, Chien-Cheng, Lippa, Magdalena, Magnard, Yves, Mehrgan, Leander, Mérand, Antoine, Moulin, Thibaut, Müller, Eric, Müller, Friedrich, Neumann, Udo, Oberti, Sylvain, Ott, Thomas, Pallanca, Laurent, Panduro, Johana, Pasquini, Luca, Paumard, Thibaut, Percheron, Isabelle, Perraut, Karine, Perrin, Guy, Pflüger, Andreas, Duc, Thanh Phan, Plewa, Philipp M., Popovic, Dan, Rabien, Sebastian, Ramírez, Andrés, Ramos, Jose, Rau, Christian, Riquelme, Miguel, Rodríguez-Coira, Gustavo, Rohloff, Ralf-Rainer, Rosales, Alejandra, Rousset, Gérard, Sanchez-Bermudez, Joel, Scheithauer, Silvia, Schöller, Markus, Schuhler, Nicolas, Spyromilio, Jason, Straub, Odele, Straubmeier, Christian, Sturm, Eckhard, Suarez, Marcos, Tristram, Konrad R. W., Ventura, Noel, Vincent, Frédéric, Waisberg, Idel, Wank, Imke, Widmann, Felix, Wieprecht, Ekkehard, Wiest, Michael, Wiezorrek, Erich, Wittkowski, Markus, Woillez, Julien, Wolff, Burkhard, Yazici, Senol, Ziegler, Denis, Zins, Gérard   +135 more
openaire   +9 more sources