DOCSLIB.ORG

Curriculum Vitae

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text

Load more

Curriculum Vitae Name: Ata Sarajedini Address: Department of Astronomy University of Florida 211 Bryant Space Science Center P. O. Box 112055 Gainesville, FL 32607-2055 USA Office Phone: (352) 294-1877 (Astronomy) Office Phone: (352) 294-1963 (Dean’s) Cell Phone: (352) 281-4286 Email: [email protected] Web Page: http://www.astro.ufl.edu/~ata/ Research Interests: Resolved Stellar Populations in Local Group Galaxies Special Interests: Globular Clusters Open Clusters Pulsating Variable Stars Education: Ph.D. Astronomy, Yale University, 1992 M. Phil., Astronomy, Yale University, 1988 M.S. Astronomy, Yale University, 1988 Certificate of Advanced Study in Observational Astronomy, Vatican Observatory Summer School B.S. Astronomy & Physics, Yale College, 1986 Employment and Professional Positions: 2016 – Scientific Editor, Journals of the American Astronomical Society 2012 – present Associate Dean for Natural Science and Mathematics and Associate Dean for Research, College of Liberal Arts and Sciences, University of Florida 2012 – 2015 Associate Editor-in-Chief, The Astronomical Journal 2011 – 2012 Acting Chair, Dept. of Astronomy, University of Florida 2009 – 2012 Associate Chair, Dept. of Astronomy, University of Florida 2008 – present Professor, Dept. of Astronomy, University of Florida 2003 – 2008 Associate Professor, Dept. of Astronomy, University of Florida 2002 – 2008 Graduate Program Director, Dept. of Astronomy, University of Florida 2001 – 2003 Assistant Professor, Dept. of Astronomy, University of Florida 1999 – 2000 Assistant Professor, Wesleyan University, Middletown, CT 1996 – 1998 Hubble Fellow, San Francisco State University, San Francisco, CA 1996 – 1998 Hubble Fellow, University of California, Santa Cruz, CA 1994 – 1997 Kitt Peak Optical Imaging Scientist (4-m, 2.1m, 0.9m), Tucson, AZ 1994 – 1997 Kitt Peak CCDPHOT Instrument Scientist, Tucson, AZ 1992 – 1995 Post-Doctoral Fellow, Kitt Peak National Observatory, Tucson, AZ 1988 – 1992 Research Assistant, Yale University, New Haven, CT 1987 – 1992 Teaching Fellow, Yale University, New Haven, CT 1985 – 1986 Summer Research Assistant, Sacramento Peak Observatory 1984 – 1985 Summer Research Assistant, Yale University 1984 Summer Research Assistant, Maria Mitchell Observatory Awards and Honors: 2016 – Scientific Editor, Journals of the American Astronomical Society 2012 – 2015 Associate Editor-in-Chief of The Astronomical Journal 2010 Invited Plenary Speaker American Astronomical Society 2006 – 2009 University of Florida Research Foundation Professor Award 2001 National Science Foundation CAREER Award 1996 Hubble Postdoctoral Fellowship 1993 Dirk Brower Prize, Meritorious PhD Dissertation 1986 – 1987 Boris Garfinkel Prize Professional Service (Inter/National): Agencies and Associations American Astronomical Society 2012 – 2015 Associate Editor-in-Chief, The Astronomical Journal 2016 – Scientific Editor, Journals of the American Astronomical Society Astronomical Society of the Pacific 2011 – 2012 Member of the Publications Board 1995 Editor, Proceedings of Conference “The Formation of the Galactic Halo … Inside and Out,” ASP Conference Series, Vol. 1994 – 1995 Local Organizing Committee for “The Formation of the Galactic Halo … Inside and Out,” conference, October 1995 Indiana University 2014 Member of the Astronomy Department External Review Committee International Astronomical Union 2009 Scientific Organizing Committee, IAU Symposium No. 266 2003 – 2006 President, IAU Commission 37 (Star Clusters) 2000 – 2003 Vice President, IAU Commission 37 (Star Clusters) 1997 – 2012 Organizing Committee, IAU Commission 37 (Star Clusters) NASA 2011 Hubble Space Telescope Time Allocation Committee, Panel Chair 2010 – Hubble Space Telescope Financial Review Committee 2009 – Hubble Space Telescope Users Committee 2009 James Web Space Telescope System Design Review 1 2007 Hubble Space Telescope Time Allocation Committee, Panel Chair 2005 Hubble Space Telescope Time Allocation Committee 2004 Spitzer Space Telescope Time Allocation Committee 2002 Hubble Space Telescope Time Allocation Committee 2000 – 2007 Space Interferometry Mission (SIM) Key Project member National Science Foundation 2004 Galactic Astronomy Panel, Division of Astronomical Sciences 2000 Research at Undergraduate Institutions Panel, Division of Astronomical Sciences 1996 Stellar Astronomy Panel, Division of Astronomical Sciences American University of Sharjah – United Arab Emirates 2015 Astrophysics Conference Advisory Board Ground-Based Observatories National Optical Astronomy Observatory 2007 – 2009 Galactic Astronomy Time Allocation Committee, Chair 2006 – 2010 NOAO Users Committee Gran Telescopio Canarias 2009 – 2012 Time Allocation Committee Gemini Observatory 1997 Scientific Advisory Panel WIYN Observatory 2001 – 2009 WIYN 0.9m Scheduling Committee 2001 – 2004 WIYN 0.9m Telescope Scientist 1999 – 2000 Project Scientist, WIYN 0.9m telescope refurbishment Vatican Observatory 1996 Editorial Board, Vatican Observatory Summer School 10th Anniversary Commemorative Volume Courses Taught: 1. Astronomy 7939, “Stellar Populations,” Graduate course at the University of Florida 2. Astronomy 6215, “Stars and the Galaxy,” Graduate course at the University of Florida 3. Astronomy 4300, “Galactic Astronomy,” Undergraduate course at the University of Florida 4. Astronomy 4211, “Essentials of Astrophysics,” Undergraduate course at the University of Florida 5. Astronomy 1002, “Discovering the Universe,” Undergraduate course at the University of Florida 6. Astronomy 221, “Galactic Astronomy,” Undergraduate course at the Wesleyan University 7. Astronomy 211, “Observational Techniques,” Undergraduate course at the Wesleyan University 8. Astronomy 105, “Descriptive Astronomy,” Undergraduate course at the Wesleyan University Outreach Activities: 2015 Featured speaker at the Starry Night event of the Florida Museum of Natural History 2010 – 2016 Led UF booth at the USA Science and Engineering Expo, Washington, DC 2013 – 2015 Led UF booth at Sunshine State Scholars Event in Orlando, FL 2007, 2015 Presentations to the Alachua Astronomy Club Professional Societies: American Astronomical Society International Astronomical Union Sigma Xi Advisees: Undergraduate Research Wendy Forrester (1993, Smith College), Chris Gottbrath Students: (1993, Depauw University), Christina Lowe (1994, University of Arizona), Sean McGinnis (1996, Case Western Reserve University), James Roche (1996, University of Arizona), Jamie Ostheimer (1997, University of Virginia), Kres Neely (1999, Haverford College), Tara Gokas (2000, Middlebury College), Rossen Djagalov (2000, Williams College), Linda Watson (2005, University of Florida), Allison Kirkpatrick (2008, University of Florida), Katelyn Milliman (2008, University of Florida), Anita Walsh (2014, University of Florida), Ishin Iwasaki (2014, University of Florida), Krista Blue (2015, University of Florida), J. P. Ayres (2015, University of Florida), Gabriel Fuentes (2015, University of Florida), Clarence Tan (2016, University of Florida), Alex Deweerd (2016, University of Florida) Undergraduate Theses: Hugh Crowl (1999, Wesleyan University) Masters Degrees: Matt Pappas (1999, Wesleyan University) PhD Degrees: Aaron Grocholski (2007, University of Florida), Mike Barker (2008, University of Florida), Roger Cohen (2011, University of Florida), Soung-Chul Yang (2012, University of Florida), Izaskun San Roman (2012, University of Florida), Rachel Wagner-Kaiser (expected 2016, University of Florida), Antonio Ordonez (expected 2017, University of Florida), Nahathai Tanakul (expected 2017, University of Florida), Chutipong Suwanajaak (expected 2017, University of Florida) Postdoctoral Glenn Tiede (2002-2004), Maren Hempel (2007-2009), Researchers: Karen Kinemuchi (2009-2011), Soung-Chul Yang (2012), Aaron Grocholski (2013) Research Funding: 1. “Exploring the Nature and Synchronicity of Early Cluster Formation in the Local Group,” NASA/HST, $136,584, 10/2015 – 9/2016, PI (Pending) 2. “Opening the Window on Galaxy Assembly: Ages and Structural Parameters of Globular Clusters Towards the Galactic Bulge,” $67,149, 10/2015 – 9/2016, Co-I, (Pending) 3. “The HST Legacy Survey of Galactic Globular Clusters,” NASA/HST, $71,000, 12/2013 – 11/2015, Co-I 4. “Panchromatic Hubble Andromeda Treasury,” NASA/HST, $160,000, 7/10-6/15, Co-I. 5. “Variable Stars in the Andromeda System,” NASA/HST, $74,000, 10/10 – 9/13, P.I. 6. “An ACS Survey of Galactic Globular Clusters”, Supplement, STScl, $14,579, 1 year, P.I. 7. “Exceptional Galactic Halo Globular Clusters and the Second Parameter,” NASA/HST, $66,524, 9/09-8/12, Co-I. 8. "The Ages of Globular Clusters and the Population II Distance Scale," NASA/HST, $17,822, 9/08-12/13, Co-I. 9. “An Extensive Photometric and Spectroscopic Survey of M33,” NSF, $104,181, 9/1/2007- 8/31/2009, P.I. 10. “An ACS Survey of Galactic Globular Clusters”, Supplement, STScl, $37,525, 1 year, P.I. 11. “RR Lyrae Variables in the Local Group,” NASA/HST, $70,000, 9/1/2007-8/31/2008, P.I. 12. “A Comprehensive Photometric and Spectroscopic Survey of M33,” NSF, $100,000, 9/1/2007-8/31/2009, P.I. 13. “WIYN Open Cluster Photometry: The Next Generation,” NSF, $255,641, 7/01/2006 – 6/30/2009, P.I. 14. “An ACS Survey of Galactic Globular Clusters,” NASA/HST, $174,304, 04/01/2006- 03/31/2008, P.I. 15. “The Formation History of the M81 Spheroid,” HST/GO-10604, $25,967, 9/2005-8/2008, P.I. 16. “Search for Metallicity Spreads in M31 Globular Clusters,” HST/GO-9719, $26,901, 8/2003-12/2006, Co-I. 17. “The Star Formation History and
Recommended publications
  • II Publications, Presentations

    II Publications, Presentations

    II Publications, Presentations 1. Refereed Publications Izumi, K., Kotake, K., Nakamura, K., Nishida, E., Obuchi, Y., Ohishi, N., Okada, N., Suzuki, R., Takahashi, R., Torii, Abadie, J., et al. including Hayama, K., Kawamura, S.: 2010, Y., Ueda, A., Yamazaki, T.: 2010, DECIGO and DECIGO Search for Gravitational-wave Inspiral Signals Associated with pathfinder, Class. Quantum Grav., 27, 084010. Short Gamma-ray Bursts During LIGO's Fifth and Virgo's First Aoki, K.: 2010, Broad Balmer-Line Absorption in SDSS Science Run, ApJ, 715, 1453-1461. J172341.10+555340.5, PASJ, 62, 1333. Abadie, J., et al. including Hayama, K., Kawamura, S.: 2010, All- Aoki, K., Oyabu, S., Dunn, J. P., Arav, N., Edmonds, D., Korista sky search for gravitational-wave bursts in the first joint LIGO- K. T., Matsuhara, H., Toba, Y.: 2011, Outflow in Overlooked GEO-Virgo run, Phys. Rev. D, 81, 102001. Luminous Quasar: Subaru Observations of AKARI J1757+5907, Abadie, J., et al. including Hayama, K., Kawamura, S.: 2010, PASJ, 63, S457. Search for gravitational waves from compact binary coalescence Aoki, W., Beers, T. C., Honda, S., Carollo, D.: 2010, Extreme in LIGO and Virgo data from S5 and VSR1, Phys. Rev. D, 82, Enhancements of r-process Elements in the Cool Metal-poor 102001. Main-sequence Star SDSS J2357-0052, ApJ, 723, L201-L206. Abadie, J., et al. including Hayama, K., Kawamura, S.: 2010, Arai, A., et al. including Yamashita, T., Okita, K., Yanagisawa, TOPICAL REVIEW: Predictions for the rates of compact K.: 2010, Optical and Near-Infrared Photometry of Nova V2362 binary coalescences observable by ground-based gravitational- Cyg: Rebrightening Event and Dust Formation, PASJ, 62, wave detectors, Class.
  • Arxiv:Astro-Ph/9808091V1 10 Aug 1998 Pc Eecp Cec Nttt,Wihi Prtdb the NAS5-26555

    Arxiv:Astro-Ph/9808091V1 10 Aug 1998 Pc Eecp Cec Nttt,Wihi Prtdb the NAS5-26555

    To appear in the Astronomical Journal (accepted 1998 August 10) WFPC2 OBSERVATIONS OF STAR CLUSTERS IN THE MAGELLANIC CLOUDS. II. THE OLDEST STAR CLUSTERS IN THE SMALL MAGELLANIC CLOUD1 Kenneth J. Mighell2 Kitt Peak National Observatory, National Optical Astronomy Observatories3, P. O. Box 26732, Tucson, AZ 85726-6732 Electronic mail: [email protected] Ata Sarajedini4 Department of Physics and Astronomy, San Francisco State University, 1600 Holloway Avenue, San Francisco, CA 94132 Electronic mail: [email protected] Rica S. French5 Middle Tennessee State University, Physics & Astronomy Department, WPS 219, P. O. Box 71, Murfreesboro, TN 37132 Electronic mail: [email protected] arXiv:astro-ph/9808091v1 10 Aug 1998 1 Based on observations made with the NASA/ESA Hubble Space Telescope, obtained from the data archive at the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc. under NASA contract NAS5-26555. 2 Guest User, Canadian Astronomy Data Centre, which is operated by the Dominion Astrophysical Observatory for the National Research Council of Canada’s Herzberg Institute of Astrophysics. 3NOAO is operated by the Association of Universities for Research in Astronomy, Inc., under cooperative agreement with the National Science Foundation. 4Hubble Fellow 5Based on research conducted at NOAO as part of the Research Experiences for Undergraduates program. – 2 – ABSTRACT We present our analysis of archival Hubble Space Telescope Wide Field Planetary Camera 2 (WFPC2) observations in F450W ( B) and F555W ( V ) of the ∼ ∼ intermediate-age populous star clusters NGC 121, NGC 339, NGC 361, NGC 416, and Kron 3 in the Small Magellanic Cloud.
  • Apus Constellation Visible at Latitudes Between +5° and -90°

    Apus Constellation Visible at Latitudes Between +5° and -90°

    Apus Constellation Visible at latitudes between +5° and -90°. Best visible at 21:00 (9 p.m.) during the month of July. Apus is a small constellation in the southern sky. It represents a bird-of-paradise, and its name means "without feet" in Greek because the bird-of-paradise was once wrongly believed to lack feet. First depicted on a celestial globe by Petrus Plancius in 1598, it was charted on a star atlas by Johann Bayer in his 1603 Uranometria. The French explorer and astronomer Nicolas Louis de Lacaille charted and gave the brighter stars their Bayer designations in 1756. The five brightest stars are all reddish in hue. Shading the others at apparent magnitude 3.8 is Alpha Apodis, an orange giant that has around 48 times the diameter and 928 times the luminosity of the Sun. Marginally fainter is Gamma Apodis, another ageing giant star. Delta Apodis is a double star, the two components of which are 103 arcseconds apart and visible with the naked eye. Two star systems have been found to have planets. Apus was one of twelve constellations published by Petrus Plancius from the observations of Pieter Dirkszoon Keyser and Frederick de Houtman who had sailed on the first Dutch trading expedition, known as the Eerste Schipvaart, to the East Indies. It first appeared on a 35-cm diameter celestial globe published in 1598 in Amsterdam by Plancius with Jodocus Hondius. De Houtman included it in his southern star catalogue in 1603 under the Dutch name De Paradijs Voghel, "The Bird of Paradise", and Plancius called the constellation Paradysvogel Apis Indica; the first word is Dutch for "bird of paradise".
  • A Gaia DR2 View of the Open Cluster Population in the Milky Way T

    A Gaia DR2 View of the Open Cluster Population in the Milky Way T

    Astronomy & Astrophysics manuscript no. manuscript˙arXiv2 © ESO 2018 July 13, 2018 A Gaia DR2 view of the Open Cluster population in the Milky Way T. Cantat-Gaudin1, C. Jordi1, A. Vallenari2, A. Bragaglia3, L. Balaguer-Nu´nez˜ 1, C. Soubiran4, D. Bossini2, A. Moitinho5, A. Castro-Ginard1, A. Krone-Martins5, L. Casamiquela4, R. Sordo2, and R. Carrera2 1 Institut de Ciencies` del Cosmos, Universitat de Barcelona (IEEC-UB), Mart´ı i Franques` 1, E-08028 Barcelona, Spain 2 INAF-Osservatorio Astronomico di Padova, vicolo Osservatorio 5, 35122 Padova, Italy 3 INAF-Osservatorio di Astrofisica e Scienza dello Spazio, via Gobetti 93/3, 40129 Bologna, Italy 4 Laboratoire dAstrophysique de Bordeaux, Univ. Bordeaux, CNRS, UMR 5804, 33615 Pessac, France 5 CENTRA, Faculdade de Ciencias,ˆ Universidade de Lisboa, Ed. C8, Campo Grande, P-1749-016 Lisboa, Portugal Received date / Accepted date ABSTRACT Context. Open clusters are convenient probes of the structure and history of the Galactic disk. They are also fundamental to stellar evolution studies. The second Gaia data release contains precise astrometry at the sub-milliarcsecond level and homogeneous pho- tometry at the mmag level, that can be used to characterise a large number of clusters over the entire sky. Aims. In this study we aim to establish a list of members and derive mean parameters, in particular distances, for as many clusters as possible, making use of Gaia data alone. Methods. We compile a list of thousands of known or putative clusters from the literature. We then apply an unsupervised membership assignment code, UPMASK, to the Gaia DR2 data contained within the fields of those clusters.
  • A Basic Requirement for Studying the Heavens Is Determining Where In

    A Basic Requirement for Studying the Heavens Is Determining Where In

    Abasic requirement for studying the heavens is determining where in the sky things are. To specify sky positions, astronomers have developed several coordinate systems. Each uses a coordinate grid projected on to the celestial sphere, in analogy to the geographic coordinate system used on the surface of the Earth. The coordinate systems differ only in their choice of the fundamental plane, which divides the sky into two equal hemispheres along a great circle (the fundamental plane of the geographic system is the Earth's equator) . Each coordinate system is named for its choice of fundamental plane. The equatorial coordinate system is probably the most widely used celestial coordinate system. It is also the one most closely related to the geographic coordinate system, because they use the same fun­ damental plane and the same poles. The projection of the Earth's equator onto the celestial sphere is called the celestial equator. Similarly, projecting the geographic poles on to the celest ial sphere defines the north and south celestial poles. However, there is an important difference between the equatorial and geographic coordinate systems: the geographic system is fixed to the Earth; it rotates as the Earth does . The equatorial system is fixed to the stars, so it appears to rotate across the sky with the stars, but of course it's really the Earth rotating under the fixed sky. The latitudinal (latitude-like) angle of the equatorial system is called declination (Dec for short) . It measures the angle of an object above or below the celestial equator. The longitud inal angle is called the right ascension (RA for short).
  • Arxiv:2103.07476V1 [Astro-Ph.GA] 12 Mar 2021

    Arxiv:2103.07476V1 [Astro-Ph.GA] 12 Mar 2021

    FERMILAB-PUB-21-075-AE-LDRD Draft version September 3, 2021 Typeset using LATEX twocolumn style in AASTeX63 The DECam Local Volume Exploration Survey: Overview and First Data Release A. Drlica-Wagner ,1, 2, 3 J. L. Carlin ,4 D. L. Nidever ,5, 6 P. S. Ferguson ,7, 8 N. Kuropatkin ,1 M. Adamow´ ,9, 10 W. Cerny ,2, 3 Y. Choi ,11 J. H. Esteves,12 C. E. Mart´ınez-Vazquez´ ,13 S. Mau ,14, 15 A. E. Miller,16, 17 B. Mutlu-Pakdil ,2, 3 E. H. Neilsen ,1 K. A. G. Olsen ,6 A. B. Pace ,18 A. H. Riley ,7, 8 J. D. Sakowska ,19 D. J. Sand ,20 L. Santana-Silva ,21 E. J. Tollerud ,11 D. L. Tucker ,1 A. K. Vivas ,13 E. Zaborowski,2 A. Zenteno ,13 T. M. C. Abbott ,13 S. Allam ,1 K. Bechtol ,22, 23 C. P. M. Bell ,16 E. F. Bell ,24 P. Bilaji,2, 3 C. R. Bom ,25 J. A. Carballo-Bello ,26 D. Crnojevic´ ,27 M.-R. L. Cioni ,16 A. Diaz-Ocampo,28 T. J. L. de Boer ,29 D. Erkal ,19 R. A. Gruendl ,30, 31 D. Hernandez-Lang,32, 13, 33 A. K. Hughes,20 D. J. James ,34 L. C. Johnson ,35 T. S. Li ,36, 37, 38 Y.-Y. Mao ,39, 38 D. Mart´ınez-Delgado ,40 P. Massana,19, 41 M. McNanna ,22 R. Morgan ,22 E. O. Nadler ,14, 15 N. E. D. Noel¨ ,19 A. Palmese ,1, 2 A. H. G. Peter ,42 E. S.
  • Structural Analysis of the Sextans Dwarf Spheroidal Galaxy

    Structural Analysis of the Sextans Dwarf Spheroidal Galaxy

    MNRAS 000,1{16 (2015) Preprint 9 October 2018 Compiled using MNRAS LATEX style file v3.0 Structural analysis of the Sextans dwarf spheroidal galaxy T. A. Roderick,1? H. Jerjen,1 G. S. Da Costa,1 A. D. Mackey1 1Research School of Astronomy and Astrophysics, Australian National University, Canberra, ACT 2611, Australia Accepted XXX. Received YYY; in original form ZZZ ABSTRACT We present wide-field g and i band stellar photometry of the Sextans dwarf spheroidal galaxy and its surrounding area out to four times its half-light radius (rh = 695 pc), based on images obtained with the Dark Energy Camera at the 4-m Blanco tele- scope at CTIO. We find clear evidence of stellar substructure associated with the galaxy, extending to a distance of 820 (2 kpc) from its centre. We perform a sta- tistical analysis of the over-densities and find three distinct features, as well as an extended halo-like structure, to be significant at the 99:7% confidence level or higher. Unlike the extremely elongated and extended substructures surrounding the Hercules dwarf spheroidal galaxy, the over-densities seen around Sextans are distributed evenly about its centre, and do not appear to form noticeable tidal tails. Fitting a King 0 0 model to the radial distribution of Sextans stars yields a tidal radius rt = 83:2 ± 7:1 (2.08±0.18 kpc), which implies the majority of detected substructure is gravitationally bound to the galaxy. This finding suggests that Sextans is not undergoing significant tidal disruption from the Milky Way, supporting the scenario in which the orbit of Sextans has a low eccentricity.
  • CURRICULUM VITAE NAME: Robert David Mathieu ADDRESS

    CURRICULUM VITAE NAME: Robert David Mathieu ADDRESS

    CURRICULUM VITAE NAME: Robert David Mathieu ADDRESS: Department of Astronomy University of Wisconsin - Madison Madison, WI 53706 (608) 890-3767 [email protected] RESEARCH INTERESTS: Stellar evolution and dynamics; STEM learning in higher education Special interests: Alternative stellar evolution pathways Binary star populations Structure, kinematics and dynamics of star clusters and star-forming regions Future faculty development in STEM EDUCATION: University of California, Berkeley Degree: Ph.D. in Astronomy, 1983 Thesis Title: The Structure, Internal Kinematics and Dynamics of Open Star Clusters Thesis Advisor: Prof. Ivan R. King Princeton University Degree: A.B. summa cum laude in Astronomy, 1978 Thesis Title: The Effects of Binaries on the Evolution of Isolated Spherical Star Systems Thesis Advisor: Prof. Lyman Spitzer, Jr. PROFESSIONAL POSITIONS: 2018- Albert E. Whitford Professor of Astronomy 2015- Affiliate Professor, Education Leadership and Policy Analysis 2013-2019 Associate Dean for Research, School of Education 2013-2019 Director, Wisconsin Center for Education Research 2013- Vilas Distinguished Achievement Professor of Astronomy 2008-12 Chair, Department of Astronomy 2002- Director, Center for the Integration of Research, Teaching, and Learning 1999-04 President, WIYN Observatory Board of Directors 1998-01 Associate Director, National Institute for Science Education 1998-01 Director, College Level - 1 Institute 1996- Professor, University of Wisconsin - Madison 1992-93 Visiting Associate Astronomer, Lick Observatory,
  • Statistics and Properties of Emission-Line Regions in the Local

    Statistics and Properties of Emission-Line Regions in the Local

    Mon. Not. R. Astron. Soc. 000, 000–000 (0000) Printed 27 April 2020 (MN LATEX style file v2.2) Statistics and Properties of Emission-Line Regions in the Local Volume Dwarf Galaxies I. D. Karachentsev1⋆, S.S.Kaisin1† 1Special Astrophysical Observatory of the Russian Academy of Sciences, Nizhnij Arkhyz, KChR, 369167, Russia 27 April 2020 ABSTRACT We used the Hα images from a large sample of nearby late-type dwarf galaxies to investigate properties of their emission structure. The sample consists of three hundred galaxies of the irregular (Irr), Magellanic irregular (Im), blue compact dwarf (BCD), and transition (Tr) types situated within a distance of 11 Mpc. In each galaxy, we indicated: the number of compact HII-regions, the presence of bubble-like or filament-like structures, the presence of a faint diffuse emission, and a sign of the global burst. The larger luminosity of a galaxy, the greater number of compact HII-sources in it. The integral and specific star-formation rates of the dwarf increase steeply with the increase of the number of HII-regions showing the evidence of the epidemic character of star-formation process. The dwarf galaxies with emission-line bubbles, or filaments, or signs of the global star-formation burst have approximately the same hydrogen-mass-to-luminosity ratio as that of the whole sample objects. arXiv:2004.11550v1 [astro-ph.GA] 24 Apr 2020 However, their mean star-formation rate is significantly higher than that of other galaxies in the sample. Emission bubble-like structures are found in the nearby dwarfs with a frequency of 1 case per 4-5 galaxies.
  • Una Aproximación Física Al Universo Local De Nebadon

    Una Aproximación Física Al Universo Local De Nebadon

    4 1 0 2 local Nebadon de Santiago RodríguezSantiago Hernández Una aproximación física al universo (160.1) 14:5.11 La curiosidad — el espíritu de investigación, el estímulo del descubrimiento, el impulso a la exploración — forma parte de la dotación innata y divina de las criaturas evolutivas del espacio. Tabla de contenido 1.-Descripción científica de nuestro entorno cósmico. ............................................................................. 3 1.1 Lo que nuestros ojos ven. ................................................................................................................ 3 1.2 Lo que la ciencia establece ............................................................................................................... 4 2.-Descripción del LU de nuestro entorno cósmico. ................................................................................ 10 2.1 Universo Maestro ........................................................................................................................... 10 2.2 Gran Universo. Nivel Espacial Superunivesal ................................................................................. 13 2.3 Orvonton. El Séptimo Superuniverso. ............................................................................................ 14 2.4 En el interior de Orvonton. En la Vía Láctea. ................................................................................. 18 2.5 En el interior de Orvonton. Splandon el 5º Sector Mayor ............................................................ 19
  • Publications OFTHK Astronomical Socik-N-Οκτπκ Pacific 101: 570-572, June 1989

    Publications OFTHK Astronomical Socik-N-Οκτπκ Pacific 101: 570-572, June 1989

    Publications OFTHK Astronomical SociK-n-οκτπκ Pacific 101: 570-572, June 1989 A SURVEY FOR RR LYRAE VARIABLES IN FIVE SMALL MAGELLANIC CLOUD CLUSTERS ALISTAIR R. WALKER Cerro Tololo Inter-American Observatory, National Optical Astronomy Observatories* Casilla 603, La Serena, Chile Received 1989 March 15 ABSTRACT Results are presented of a search for RR Lyrae variables in the SMC clusters NGC 121, Lindsay 1, Kron 3, Kron 7, and Kron 44. The techniques used rediscovered the four RR Lyraes in NGC 121, but no variables were found in the other clusters. It is concluded that RR Lyraes do not occur in SMC clusters younger than — 11 Gyr. Key words: star clusters-Magellanic Clouds-variable stars: RR Lyrae stars 1. Introduction Lindsay 1 but did not find any variables; however, the The Small Magellanic Cloud (SMC) contains a number majority of his plates were exposed in times of rather poor of populous clusters in the age range 3-12 Gyr, unlike seeing. A survey of several MC clusters for RR Lyraes was either the Galaxy or the Large Magellanic Cloud (LMC). made, using the Yale 1-m telescope and an image-tube Olszewski (1986) and Olszewski, Schommer, and camera, by Graham and Nemec (1984). They found many Aaronson (1987, henceforth OSA) point out that it should variables in old LMC clusters but none in the two SMC be possible to determine the age of the youngest cluster clusters blinked, NGC 339 and NGC 416. RR Lyraes by a suitable survey for the variables in the Since these surveys, color-magnitude diagrams candidate clusters.
  • Surface Brightness Fluctuation Distances for Nearby Dwarf Elliptical

    Surface Brightness Fluctuation Distances for Nearby Dwarf Elliptical

    A&A 380, 90–101 (2001) Astronomy DOI: 10.1051/0004-6361:20011408 & c ESO 2001 Astrophysics Surface brightness fluctuation distances for nearby dwarf elliptical galaxies? H. Jerjen1,R.Rekola2, L. Takalo2, M. Coleman1, and M. Valtonen2 1 Research School of Astronomy and Astrophysics, The Australian National University, Mt Stromlo Observatory, Cotter Road, Weston ACT 2611, Australia 2 Tuorla Observatory, University of Turku, V¨ais¨al¨antie 20, 21500 Piikki¨o, Finland Received 12 July 2001 / Accepted 2 October 2001 Abstract. We obtained deep B and R-band CCD images for the dwarf elliptical (dE) galaxies DDO 44, UGC 4998, KK98 77, DDO 71, DDO 113, and UGC 7356 at the Nordic Optical Telescope. Employing Fourier analysis technique we measure stellar R-band surface brightness fluctuations (SBFs) and magnitudes in 29 different fields of the galaxies. Independent tip of the red giant branch distances for DDO 44, KK98 77, DDO 71 are used to convert their set of apparent into absolute SBF magnitudes. The results are combined with the corresponding local (B −R) colours and compared with the (B −R)−M R relation for mainly old, metal-poor stellar populations as predicted by Worthey’s population synthesis models using Padova isochrones. While the colour dependency of the theoretical relation is confirmed by the empirical data, we find a systematic zero point offset between observations and theory in the sense that models are too faint by 0.13 (0.02) mag. Based on these findings we establish a new semiempirical calibration of the SBF method as distance indicator for dE galaxies with an estimated uncertainty of ≈10%.