More Than a Theory Revealing a Testable Model for Creation By: Hugh Ross
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The Remarkable Solar Twin HIP 56948: a Prime Target in the Quest for Other
Astronomy & Astrophysics manuscript no. keck56948˙2012˙04˙06 c ESO 2018 October 30, 2018 The remarkable solar twin HIP 56948: a prime target in the quest for other Earths ⋆ Jorge Mel´endez1, Maria Bergemann2, Judith G. Cohen3, Michael Endl4, Amanda I. Karakas5, Iv´an Ram´ırez4,6, William D. Cochran4, David Yong5, Phillip J. MacQueen4, Chiaki Kobayashi5⋆⋆, and Martin Asplund5 1 Departamento de Astronomia do IAG/USP, Universidade de S˜ao Paulo, Rua do Mat˜ao 1226, Cidade Universit´aria, 05508-900 S˜ao Paulo, SP, Brazil. e-mail: [email protected] 2 Max Planck Institute for Astrophysics, Postfach 1317, 85741 Garching, Germany 3 Palomar Observatory, Mail Stop 105-24, California Institute of Technology, Pasadena, California 91125, USA 4 McDonald Observatory, The University of Texas at Austin, Austin, TX 78712, USA 5 Research School of Astronomy and Astrophysics, The Australian National University, Cotter Road, Weston, ACT 2611, Australia 6 The Observatories of the Carnegie Institution for Science, 813 Santa Barbara Street, Pasadena, CA 91101, USA Received ...; accepted ... ABSTRACT Context. The Sun shows abundance anomalies relative to most solar twins. If the abundance peculiarities are due to the formation of inner rocky planets, that would mean that only a small fraction of solar type stars may host terrestrial planets. Aims. In this work we study HIP 56948, the best solar twin known to date, to determine with an unparalleled precision how similar is to the Sun in its physical properties, chemical composition and planet architecture. We explore whether the abundances anomalies may be due to pollution from stellar ejecta or to terrestrial planet formation. -
HIGH PRECISION ABUNDANCES of the OLD SOLAR TWIN HIP 102152: INSIGHTS on LI DEPLETION from the OLDEST SUN* Talawanda R
Published in ApJL. Preprint typeset using LATEX style emulateapj v. 04/17/13 HIGH PRECISION ABUNDANCES OF THE OLD SOLAR TWIN HIP 102152: INSIGHTS ON LI DEPLETION FROM THE OLDEST SUN* TalaWanda R. Monroe1, Jorge Melendez´ 1, Ivan´ Ram´ırez2, David Yong3, Maria Bergemann4, Martin Asplund3, Jacob Bean5, Megan Bedell5, Marcelo Tucci Maia1, Karin Lind6, Alan Alves-Brito3, Luca Casagrande3, Matthieu Castro7, Jose{Dias´ do Nascimento7, Michael Bazot8, and Fabr´ıcio C. Freitas1 Published in ApJL. ABSTRACT We present the first detailed chemical abundance analysis of the old 8.2 Gyr solar twin, HIP 102152. We derive differential abundances of 21 elements relative to the Sun with precisions as high as 0.004 dex (.1%), using ultra high-resolution (R = 110,000), high S/N UVES spectra obtained on the 8.2-m Very Large Telescope. Our determined metallicity of HIP 102152 is [Fe/H] = -0.013 ± 0.004. The atmospheric parameters of the star were determined to be 54 K cooler than the Sun, 0.09 dex lower in surface gravity, and a microturbulence identical to our derived solar value. Elemental abundance ratios examined vs. dust condensation temperature reveal a solar abundance pattern for this star, in contrast to most solar twins. The abundance pattern of HIP 102152 appears to be the most similar to solar of any known solar twin. Abundances of the younger, 2.9 Gyr solar twin, 18 Sco, were also determined from UVES spectra to serve as a comparison for HIP 102152. The solar chemical pattern of HIP 102152 makes it a potential candidate to host terrestrial planets, which is reinforced by the lack of giant planets in its terrestrial planet region. -
Astronomy 2008 Index
Astronomy Magazine Article Title Index 10 rising stars of astronomy, 8:60–8:63 1.5 million galaxies revealed, 3:41–3:43 185 million years before the dinosaurs’ demise, did an asteroid nearly end life on Earth?, 4:34–4:39 A Aligned aurorae, 8:27 All about the Veil Nebula, 6:56–6:61 Amateur astronomy’s greatest generation, 8:68–8:71 Amateurs see fireballs from U.S. satellite kill, 7:24 Another Earth, 6:13 Another super-Earth discovered, 9:21 Antares gang, The, 7:18 Antimatter traced, 5:23 Are big-planet systems uncommon?, 10:23 Are super-sized Earths the new frontier?, 11:26–11:31 Are these space rocks from Mercury?, 11:32–11:37 Are we done yet?, 4:14 Are we looking for life in the right places?, 7:28–7:33 Ask the aliens, 3:12 Asteroid sleuths find the dino killer, 1:20 Astro-humiliation, 10:14 Astroimaging over ancient Greece, 12:64–12:69 Astronaut rescue rocket revs up, 11:22 Astronomers spy a giant particle accelerator in the sky, 5:21 Astronomers unearth a star’s death secrets, 10:18 Astronomers witness alien star flip-out, 6:27 Astronomy magazine’s first 35 years, 8:supplement Astronomy’s guide to Go-to telescopes, 10:supplement Auroral storm trigger confirmed, 11:18 B Backstage at Astronomy, 8:76–8:82 Basking in the Sun, 5:16 Biggest planet’s 5 deepest mysteries, The, 1:38–1:43 Binary pulsar test affirms relativity, 10:21 Binocular Telescope snaps first image, 6:21 Black hole sets a record, 2:20 Black holes wind up galaxy arms, 9:19 Brightest starburst galaxy discovered, 12:23 C Calling all space probes, 10:64–10:65 Calling on Cassiopeia, 11:76 Canada to launch new asteroid hunter, 11:19 Canada’s handy robot, 1:24 Cannibal next door, The, 3:38 Capture images of our local star, 4:66–4:67 Cassini confirms Titan lakes, 12:27 Cassini scopes Saturn’s two-toned moon, 1:25 Cassini “tastes” Enceladus’ plumes, 7:26 Cepheus’ fall delights, 10:85 Choose the dome that’s right for you, 5:70–5:71 Clearing the air about seeing vs. -
The Magnetic Fields of Young Solar-Type Stars
The Magnetic Fields of Young Solar-Type Stars Ian Angus Waite B. App. Sc. (D.D.I.A.E); Dip. Ed.; B. Econ. (U.Q.); M. Phil. (U.S.Q) University of Southern Queensland A thesis submitted for the degree of PhilosophiæDoctor (PhD) 2013, July c Copyright Ian Angus Waite 2013 ii Abstract This thesis describes an investigation aimed at using spectropolarimetric observations of the magnetic fields of young solar-type stars to improve the understanding of the early development of solar and stellar dynamos and activity cycles. The emergence of stellar dynamos is important in understanding the evolution of young stars (and activity effects on any attendant emerging planetary systems). Stars were selected on the basis of their rapid rotation and activity. HD 106506, HD 76298, HD 35256, HD 29613 and EK Draconis formed the primary targets. Spectropolarimetric data were obtained with the Anglo-Australian Telescope, the Canada-France-Hawaii Telescope and the T´elescope Bernard Lyot with supporting broadband photometric data from the Mount Kent Observatory. Reduction and analysis of the data were performed to produce magnetic field detections, spot occupancy and magnetic field maps, differential rotation values, chromospheric flux estimates, starspot light curves and other measurements. Several results were obtained, as follows: (1) A distributed dynamo fundamentally different to the modern Sun’s interface-layer dynamo appears widespread in young solar- type stars, with all targets displaying significant surface azimuthal fields consistent with the dynamo operating -
The Chemical Composition of Solar-Type Stars and Its Impact on the Presence of Planets
The chemical composition of solar-type stars and its impact on the presence of planets Patrick Baumann Munchen¨ 2013 The chemical composition of solar-type stars and its impact on the presence of planets Patrick Baumann Dissertation der Fakultat¨ fur¨ Physik der Ludwig-Maximilians-Universitat¨ Munchen¨ durchgefuhrt¨ am Max-Planck-Institut fur¨ Astrophysik vorgelegt von Patrick Baumann aus Munchen¨ Munchen,¨ den 31. Januar 2013 Erstgutacher: Prof. Dr. Achim Weiss Zweitgutachter: Prof. Dr. Joachim Puls Tag der mündlichen Prüfung: 8. April 2013 Zusammenfassung Wir untersuchen eine mogliche¨ Verbindung zwischen den relativen Elementhaufig-¨ keiten in Sternatmospharen¨ und der Anwesenheit von Planeten um den jeweili- gen Stern. Um zuverlassige¨ Ergebnisse zu erhalten, untersuchen wir ausschließlich sonnenahnliche¨ Sterne und fuhren¨ unsere spektroskopischen Analysen zur Bestim- mung der grundlegenden Parameter und der chemischen Zusammensetzung streng differenziell und relativ zu den solaren Werten durch. Insgesamt untersuchen wir 200 Sterne unter Zuhilfenahme von Spektren mit herausragender Qualitat,¨ die an den modernsten Teleskopen gewonnen wurden, die uns zur Verfugung¨ stehen. Mithilfe der Daten fur¨ 117 sonnenahnliche¨ Sterne untersuchen wir eine mogliche¨ Verbindung zwischen der Oberflachenh¨ aufigkeit¨ von Lithium in einem Stern, seinem Alter und der Wahrscheinlichkeit, dass sich ein oder mehrere Sterne in einer Um- laufbahn um das Objekt befinden. Fur¨ jeden Stern erhalten wir sehr exakte grundle- gende Parameter unter Benutzung einer sorgfaltig¨ zusammengestellten Liste von Fe i- und Fe ii-absorptionslinien, modernen Modellatmospharen¨ und Routinen zum Erstellen von Modellspektren. Die Massen und das Alter der Objekte werden mithilfe von Isochronen bestimmt, was zu sehr soliden relativen Werten fuhrt.¨ Bei jungen Sternen, fur¨ die die Isochronenmethode recht unzuverlssig¨ ist, vergleichen wir verschiedene alternative Methoden. -
Investigating Planet Formation and Composition Through Observations of Carbon and Oxygen Species in Stars, Disks, and Planets
Connecting the Dots: Investigating Planet Formation and Composition Through Observations of Carbon and Oxygen Species in Stars, Disks, and Planets Item Type text; Electronic Dissertation Authors Teske, Johanna Kavanagh Publisher The University of Arizona. Rights Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author. Download date 26/09/2021 06:42:44 Link to Item http://hdl.handle.net/10150/318831 CONNECTING THE DOTS: INVESTIGATING PLANET FORMATION AND COMPOSITION THROUGH OBSERVATIONS OF CARBON AND OXYGEN SPECIES IN STARS, DISKS, AND PLANETS by Johanna Kavanagh Teske A Dissertation Submitted to the Faculty of the DEPARTMENT OF ASTRONOMY In Partial Fulfillment of the Requirements For the Degree of DOCTOR OF PHILOSOPHY In the Graduate College THE UNIVERSITY OF ARIZONA 2014 2 THE UNIVERSITY OF ARIZONA GRADUATE COLLEGE As members of the Dissertation Committee, we certify that we have read the dis- sertation prepared by Johanna Kavanagh Teske entitled “Connecting the Dots: Investigating Planet Formation and Composition Through Observations of Car- boy and Oxygen Species in Disks, Stars, and Planets” and recommend that it be accepted as fulfilling the dissertation requirement for the Degree of Doctor of Phi- losophy. Date: 11 April 2014 Caitlin Griffith Date: 11 April 2014 Katia Cunha Date: 11 April 2014 Simon Schuler Date: 11 April 2014 Daniel Apai Date: 11 April 2014 George Rieke Final approval and acceptance of this dissertation is contingent upon the candi- date’s submission of the final copies of the dissertation to the Graduate College. -
Orders of Magnitude (Length) - Wikipedia
03/08/2018 Orders of magnitude (length) - Wikipedia Orders of magnitude (length) The following are examples of orders of magnitude for different lengths. Contents Overview Detailed list Subatomic Atomic to cellular Cellular to human scale Human to astronomical scale Astronomical less than 10 yoctometres 10 yoctometres 100 yoctometres 1 zeptometre 10 zeptometres 100 zeptometres 1 attometre 10 attometres 100 attometres 1 femtometre 10 femtometres 100 femtometres 1 picometre 10 picometres 100 picometres 1 nanometre 10 nanometres 100 nanometres 1 micrometre 10 micrometres 100 micrometres 1 millimetre 1 centimetre 1 decimetre Conversions Wavelengths Human-defined scales and structures Nature Astronomical 1 metre Conversions https://en.wikipedia.org/wiki/Orders_of_magnitude_(length) 1/44 03/08/2018 Orders of magnitude (length) - Wikipedia Human-defined scales and structures Sports Nature Astronomical 1 decametre Conversions Human-defined scales and structures Sports Nature Astronomical 1 hectometre Conversions Human-defined scales and structures Sports Nature Astronomical 1 kilometre Conversions Human-defined scales and structures Geographical Astronomical 10 kilometres Conversions Sports Human-defined scales and structures Geographical Astronomical 100 kilometres Conversions Human-defined scales and structures Geographical Astronomical 1 megametre Conversions Human-defined scales and structures Sports Geographical Astronomical 10 megametres Conversions Human-defined scales and structures Geographical Astronomical 100 megametres 1 gigametre -
The Phaeodactylum Genome Reveals the Dynamic Nature and MultiLineage Evolutionary History of Diatom Genomes
The Phaeodactylum genome reveals the dynamic nature and multilineage evolutionary history of diatom genomes Chris Bowler1,2, Andrew E. Allen1,3*, Jonathan H. Badger3*, Jane Grimwood4*, Kamel Jabbari1*, Alan Kuo5*, Uma Maheswari1*, Cindy Martens6*, Florian Maumus1*, Robert P. Otillar5*, Edda Rayko1*, Asaf Salamov5*, Klaas Vandepoele6*, Bank Beszteri7, Ansgar Gruber8, Marc Heijde1, Michael Katinka9, Thomas Mock10, Klaus Valentin7, Fréderic Vérret11, John A. Berges12, Colin Brownlee11, Jean-Paul Cadoret13, Anthony Chiovitti14, Chang Jae Choi12, Sacha Coesel2$, Alessandra De Martino1, J. Chris Detter5, Colleen Durkin10, Angela Falciatore2, Jérome Fournet15, Miyoshi Haruta16, Marie Huysman17, Bethany D. Jenkins18, Katerina Jiroutova19, Richard E. Jorgensen20, Yolaine Joubert15, Aaron Kaplan21, Nils Kroeger22, Peter Kroth8, Julie La Roche23, Erica Lindquist5, Markus Lommer23,Véronique Martin-Jézéquel15, Pascal J. Lopez1, Susan Lucas5, Manuela Mangogna2, KarenMcGinnis20, Linda K. Medlin7, Anton Montsant1,2, Marie-Pierre Oudot- Le Secq24, CarolynNapoli20, Miroslav Obornik19, Jean-Louis Petit9, Betina M. Porcel9, Nicole Poulsen25, Matthew Robison16, Leszek Rychlewski26, Tatiana A. Rynearson27, Jeremy Schmutz4, Micaela Schnitzler Parker10, Harris Shapiro5, Magali Siaut2§, Michele Stanley28, Michael J., Sussman16, Alison Taylor11,29, Assaf Vardi1,30, Peter von Dassow31, Wim Vyverman17, Anusuya Willis14, Lucjan S. Wyrwicz26, Daniel S. Rokhsar5, Jean Weissenbach9, E. Virginia Armbrust10, Beverley R. Green24, Yves Van de Peer6, and Igor V. Grigoriev5 -
The Genome Sequence of the Malaria of the Most Efficient Malaria Vectors in the World
R ESEARCH A RTICLES Anopheles gambiae is the major vector of Plasmodium falciparum in Africa and is one The Genome Sequence of the Malaria of the most efficient malaria vectors in the world. Its blood meals come almost exclu- Mosquito Anopheles gambiae sively from humans, its larvae develop in temporary bodies of water produced by hu- 1 1 1 Robert A. Holt, *† G. Mani Subramanian, Aaron Halpern, man activities (e.g., agricultural irrigation or Granger G. Sutton,1 Rosane Charlab,1 Deborah R. Nusskern,1 flooded human or domestic animal foot- Patrick Wincker,2 Andrew G. Clark,3 Jose´M. C. Ribeiro,4 Ron Wides,5 prints), and adults rest primarily in human Steven L. Salzberg,6 Brendan Loftus,6 Mark Yandell,1 William H. Majoros,1,6 dwellings. During the 1950s and early 1960s, Douglas B. Rusch,1 Zhongwu Lai,1 Cheryl L. Kraft,1 Josep F. Abril,7 the World Health Organization ( WHO) ma- laria eradication campaign succeeded in erad- Veronique Anthouard,2 Peter Arensburger,8 Peter W. Atkinson,8 1 2 1 9 icating malaria from Europe and sharply re- Holly Baden, Veronique de Berardinis, Danita Baldwin, Vladimir Benes, duced its prevalence in many other parts of 10 9 1 2 Jim Biedler, Claudia Blass, Randall Bolanos, Didier Boscus, the world, primarily through programs that Mary Barnstead,1 Shuang Cai,1 Angela Center,1 Kabir Chatuverdi,1 combined mosquito control with antimalarial George K. Christophides,9 Mathew A. Chrystal,11 Michele Clamp,12 drugs such as chloroquine. Sub-Saharan Af- Anibal Cravchik,1 Val Curwen,12 Ali Dana,11 Art Delcher,1 Ian Dew,1 Cheryl A. -
The Rise of Genomics
G Model CRASS3-3444; No. of Pages 9 C. R. Biologies xxx (2016) xxx–xxx Contents lists available at ScienceDirect Comptes Rendus Biologies ww w.sciencedirect.com Trajectories of genetics, 150 years after Mendel/Trajectoires de la ge´ne´tique, 150 ans apre`s Mendel The rise of genomics L’essor de la ge´nomique a,b,c, Jean Weissenbach * a Commissariat a` l’e´nergie atomique et aux e´nergies alternatives, Institut de ge´nomique, Genoscope, 2, rue Gaston-Cre´mieux, 91000 E´vry, France b CNRS, Unite´ de ge´nomique me´tabolique UMR8030, 2, rue Gaston-Cre´mieux, 91000 E´vry, France c Universite´ d’E´vry, Unite´ de ge´nomique me´tabolique UMR8030, 2, rue Gaston-Cre´mieux, 91000 E´vry, France A R T I C L E I N F O A B S T R A C T Article history: A brief history of the development of genomics is provided. Complete sequencing of Received 28 March 2016 genomes of uni- and multicellular organisms is based on important progress in sequencing Accepted after revision 19 April 2016 and bioinformatics. Evolution of these methods is ongoing and has triggered an explosion Available online xxx in data production and analysis. Initial analyses focused on the inventory of genes encoding proteins. Completeness and quality of gene prediction remains crucial. Genome analyses Keywords: profoundly modified our views on evolution, biodiversity and contributed to the detection Sequencing of new functions, yet to be fully elucidated, such as those fulfilled by non-coding RNAs. Genomes Genomics has become the basis for the study of biology and provides the molecular support Bioinformatics for a bunch of large-scale studies, the omics. -