Stellar Clusters are very useful laboratories for empirically studying stellar evolution. ... All cluster stars are at the same distance . All cluster stars have the same physical age . ... CM diagram Young Cluster In this case we see the Main Sequence fully represented. The blue dots represent massive stars with short main sequence lifetimes. ... Thus, identifying the most massive star which is still on the main sequence is an effective means of determining the age of a stellar cluster. ...

Еще в разделе: (Показать все результаты (>211) - zebu.uoregon.edu/ )

Title 5 major upgrades since 1991: 1: The ground screen 2: The Gregorian upgrade 3: Road 22 completed 4: Harris computers in the trash 5: ALFA G. Gavazzi Universita' di Milano ­ Bicocca ALFA full coverage of the Virgo cluster (800 deg2) · Detections or 1 mJy limits on 2000 VCC galaxies · Tully-Fisher distances · Search for intergalactic HI clouds SED http://goldmine.mib.infn.it. GOLDmine it HI normal HI deficient Young stars b = present / past SFR LH / LH Gavazzi et al. ...

Еще в разделе: (Показать все результаты (>5793) - www.naic.edu/ )

• http://www.naic.edu/vscience/schedule/tpfiles/DarlingtagA1725tp.ps
• GOLDMiNe: Virgo cluster optical and HI databases

. ћ . Наши юбиляры . љљљљљљљ љљљљљљљљљ . ћ Сотрудники отдела . ћ Наша научная работа . ћ Семинар по Звездной астрономии . ћ Конференции . ћ Общий Каталог Переменных Звезд . ћ Каталог рассеянных скоплений . ћ Московская школа звездной астрономии . ћ Юбилеи сотрудников . ћ Избранные публикации . ћ Педагогическая и популяризаторская деятельность . ћ Наши интернет-ресурсы и другие полезные ресурсы . ћ Ссылки на каталоги и базы данных . ћ Фотогалерея . Присылайте Ваши вопросы и комментарии Ольге Дурлевич

Еще в разделе: (Показать все результаты (>2855) - www.sai.msu.su/ )

• APOD Index - Stars: Globular Clusters
• APOD Index - Stars: Open Clusters
• APOD Index - Galaxies: Clusters of Galaxies

Title: A New Model of the Gravitational Lens 0957+561 and a Limit on the Hubble Constant . Authors: Norman A. Grogin , Ramesh Narayan (Harvard Univ.) ... Title: ROSAT/PSPC observation of the distant cluster CL0939+472 . ... Title: Interaction in the Bimodal Galaxy Cluster A3528 . ... Title: Cosmological Implications of Galaxy Cluster Evolution . ... Title: Galaxy Cluster Virial Masses and Omega . ... Matches 201 to 222 from a total of 222 matches for the search pattern galaxy cluster . ...

Еще в разделе: (Показать все результаты (>33) - sed.sao.ru/ )

• astro-ph authors/title/abstract search for 'galaxy merging' all years
• astro-ph authors/title/abstract search for 'galaxy environment' all years

... NGC 1818: A Young Globular Cluster . ... HST , NASA Explanation: Globular clusters once ruled the Milky Way . Back in the old days , back when our Galaxy first formed, perhaps thousands of globular clusters roamed our Galaxy. ... There are few, if any, young globular clusters in our Milky Way Galaxy because conditions are not ripe for more to form. ... Pictured above is a "young" globular cluster residing there: NGC 1818 . ... Publications with keywords: LMC - globular cluster . ...

Еще в разделе: (Показать все результаты (>84016) - www.astronet.ru/ )

• Young Star Clusters in an Old Galaxy

... Circumstellar Disks in Young Nebulous Clusters . ... HST . ... To take advantage of the enhanced visibility of circumstellar matter externally illuminated in a nebular environment, and to determine if the Orion "proplyds" are unique, we observed four other young nebulous clusters with HST/WFPC2 during Cycle 5. Eight fields were observed in H-alpha and I-band continuum in the nearby H II regions NGC 2024, NGC 2264, and S155. Two fields were observed in V-band in the reflection nebula NGC 7023. ...

Еще в разделе: (Показать все результаты (>11516) - www.stsci.edu/ )

• HST this week
• HST this week: 176
• HST this week: 113

... However, while low mass stars are usually found to form in loose groups with densities of a few stars per cubic parsecs, high mass stars are known to form in dense clusters with up to 10000 stars per cubic parsec. ... We have undertaken a survey of a cospicuous number of fields around intermediate mass young stars (Herbig Ae/Be stars, HAeBe) with the aim of detect and characterize the groups of young stars that may have formed together with the HAeBe star. ... BD +404124 - A rich, compact cluster. ...

Еще в разделе: (Показать все результаты (>6877) - www.arcetri.astro.it/ )

• APOD: 2001 March 11 - NGC 1818: A Young Globular Cluster
• Arcetri Star-Formation Group Publications
• HAEBE Clusters Analysis (Abstract)

... Science Users Information > Science Activities > PhD Thesis Topics offered by ESO Faculty Members > Thesis Topic: The onset of cluster formation near young high-mass stars . ... Observing with ESO Telescopes . ... ESO-MIDAS . ... ESO Data . ... We performed a NACO survey of massive young stellar objects (MYSOs) assessing the incidence of lower mass objects at angular scales 0:500 < d < 200 during the earliest, deeply embedded, phases of star formation. ... Return to list of thesis topics . ...

Еще в разделе: (Показать все результаты (>47081) - www.eso.org/ )

• ESO - The Young Star Cluster Pismis 24 in ARA: a Laboratory of Star Formation
• Young stars in the open star cluster NGC 2547
• Flying through the young star cluster Westerlund 1 (artist's impression) | ESO

... GSAOI Home . ... Science . ... The goal of this project is to detect the termination of the white dwarf cooling sequence in nearby open star clusters, and hence derive cluster ages that are independent of the normal main sequence turnoff method. ... The potential for accurate proper motion measurements, i.e., measurements of transverse motion across the sky, with GSAOI offers a means of overcoming this difficulty. ...

Еще в разделе: (Показать все результаты (>2625) - www.mso.anu.edu.au/ )

• GSAOI Super Star Clusters Science Page
• Dougal Mackey - CV
• IAU Commission #37 (Star Clusters and Associations)

ARCSAT ID NUMBER: AS06 DESCRIPTIVE TITLE: Monitoring H-alpha Variability in Be Stars in Young Clusters PI: Steven Souza ( Williams College ) OBSERVER(S): Steven Souza UNCERTIFIED/UNTRAINED OBSERVERS: none presently planned COLLABORATORS: none CONTACT INFORMATION: Steven Souza ; ssouza@ ... As an early ARCSAT user I found that data obtained using SurveyCam and narrowband filters on loan to ARC from Williams College are compatible with those obtained at Williams. ...

Еще в разделе: (Показать все результаты (>827) - www.apo.nmsu.edu/ )

• http://www.apo.nmsu.edu/Telescopes/ARCSAT/ObsSchedules/arcsat_oct2015/AS06.html
• http://www.apo.nmsu.edu/Telescopes/ARCSAT/ObsSchedules/arcsat_may2015/AS09.html
• http://www.apo.nmsu.edu/Telescopes/ARCSAT/ObsSchedules/arcsat_may2014/AS10.html

... The overall globular cluster population is divided by gap in the metallicity function at [Fe/H]=-1.0 into two discrete groups with well-defined maxima at [Fe/H]=-1.60?0.03 dex, and -0.60?0.04 dex. ... Clusters with extremely blue horizontal branches occupy a spherical volume of radius ~ 9 kpc, have high rotational velocities ( V rot =77?33 km/s), have substantial and equal negative radial and vertical metallicity gradients, and are, on average, the oldest group (the old-halo subsystem). ...

Еще в разделе: (Показать все результаты (>102) - ip.rsu.ru/ )

• Population of Galactic globular clusters, figures
• Vladimir Marsakov Publication List

... The measurements extend to a lower 1.5 GHz limit of 1.0 mJy and comprise a complete sample with 1.5-GHz flux density 2.5 S1.5 J/AuJPh/47/145 VLA Survey of Rich Clusters of Galaxies II (Slee+, 1994) J/AuJPh/49/977 VLA Survey of Rich Clusters of Galaxies III (Slee+, 1996) ================================================================================ A VLA Survey of Rich Clusters of Galaxies II. ... Note (3): An elliptical Gaussian was fitted to the source. ...

Еще в разделе: (Показать все результаты (>1236) - www.sao.ru/ )

• A VLA Survey of Rich Clusters of Galaxies II
• A 1400-MHz Survey of 1478 Abell Clusters of Galaxies
• Gravitational Lensing by Clusters of Galaxies

... Clustering of AGN and QSOs at z=1 . Using galaxies from the DEEP2 Redshift Survey and AGN from the AEGIS/Chandra survey and QSOs from SDSS, I present the cross-correlation function of AGN/QSOs and 'normal' galaxies at z=1. Using the known clustering of DEEP2 galaxies, this leads to an estimate of the bias and typical host dark matter halo mass of AGN/QSOs as a function of X-ray luminosity, which constrains AGN formation models. oral . ... Tuesday: AGN correlation functions, LSS, environments . ...

Еще в разделе: (Показать все результаты (>1821) - hea-www.harvard.edu/ )

• http://hea-www.harvard.edu/~pgreen/SOC/5.html
• Rotation Periods of ZAMS Stars
• The AstroStat Slog Blog Archive my first AAS. IV. clustering

... Ultraluminous X-ray sources (ULXs) are located in external galaxies, their X-ray luminosities (10 39 - 10 41 erg/s) are thousand times greater than those of brightest black holes in the Galaxy. ULXs may be supercritical accretion disks around black holes of stellar masses (~10 Solar masses) like that in SS433, or they may be a hypothetical intermediate-mass black holes (hundreds - thousands Solar masses) with standard accretion disks. ... 2) The ULX progenitors were ejected from the star clusters. ...

Еще в разделе: (Показать все результаты (>175) - mavr.sao.ru/ )

• important_en
• Galaxy sector, archive 2012

Astronotes Armagh Planetarium's Stellar Blog! ... Armagh Planetarium . ... Stars . ... Space Flight . ... Although they look tranquil here, observed up close such young stars would seethe and glare violently. ... Once thought to be a satellite of our own galaxy, increasingly the Small Magellanic Cloud is believed to be an interloper from the intergalactic void which has wandered into its present location and will eventually recede away into the darkness. ... Your email address will not be published. ...

Еще в разделе: (Показать все результаты (>2772) - www.armaghplanet.com/ )

• Hubble shows us a spectacular star cluster | Astronotes
• M55 globular cluster seen by ESO | Astronotes
• A Spectacular View of the Lagoon Nebula | Astronotes

. Index . Previous . 9 of 36 . Next . б© Miruna Popescu

Еще в разделе: (Показать все результаты (>2418) - star.arm.ac.uk/ )

• Untitled Web Gallery - IMG_1736
• Untitled Web Gallery - IMG_1743
• Untitled Web Gallery - IMG_1730

Next: NICMOS Coronagraphic Surveys-Preliminary Results Up: No Title Previous: STScI NICMOS Software . NICMOS Coronagraphic Surveys-Preliminary Results . ... Observations with NICMOS . ... The Evolution of Stars seen with ISOCAM - the Need for NICMOS and VLT Follow Up. ... Results . ... The Formation and Evolution of LMC Rich Star Clusters: NGC 1818 . ... HST-NICMOS Observations of Galactic Bulges: Red Nuclei in Nearby Galaxies . ... Investigating the Evolution of Quasar Host Galaxies with NICMOS . ...

Еще в разделе: (Показать все результаты (>169) - www.stecf.org/ )

• No Title
• The Formation and Evolution of LMC Rich Star Clusters: NGC 1818
• NICMOS/HST H-band (F160W) Images of the 30 Dor Starburst Cluster

... ATNF Home . ... About ATNF overview . ... Australia Telescope Steering Committee . ... Parkes radio telescope . ... Canberra Deep Space Communication Complex . ... Visiting Parkes radio telescope . ... Previous Section: Types of Galaxies found . ... We have determined that an HI-selected sample is not made up of high optical surface brightness galaxies, which are the types usually used to trace large-scale structures. ... Finally, we consider the space densities of galaxies of various HI masses. ...

Еще в разделе: (Показать все результаты (>9290) - www.atnf.csiro.au/ )

• Cluster Membership
• A Radio Survey of Older T Tauri Stars in the Chamaeleontis Cluster
• The Ursa Major Cluster

... 1st Announcement IAU Symposium 312 Star Clusters and Black Holes Across Cosmic Time, Beijing, China, Aug. 25-29, 2014 . ... SUBJECT: 1st Announcement IAU Symposium 312 Star Clusters and Black Holes Across Cosmic Time, Beijing, China, Aug. 25-29, 2014 . ... which will be held in Beijing, P.R. China, from August 25-29, 2014, hosted by Chinese Academy of Sciences . ... China), . ... 1st Announcement IAU Symposium 312 Star Clusters and Black Holes Across Cosmic Time, Beijing, China, Aug. ...

Еще в разделе: (Показать все результаты (>326) - www.mao.kiev.ua/ )

• MAO NASU :: Topic: The DRAGON globular cluster simulations: a million stars,
• Achievements - Page 4

... Structure of Data . ... Catalog . ... In SAI OCL Catalog, we introduce our work on investigation of the Milky Way system of open star clusters. The main goal of our study is a search for new clusters using huge surveys. 168 new clusters have been already discovered by us using J,H,Ks data from 2MASS point source catalog. ... For 141 new clusters, we found their physical parameters using J,H,Ks data from 2MASS catalog and, for a number of clusters, our UBVRI CCD observational magnitudes. ...

Еще в разделе: (Показать все результаты (>222) - ocl.sai.msu.ru/ )

• SAI OCL Catalog Publications
• SAI OCL Catalog Description
• SAI OCL Catalog Structure