Curriculum Vitae Feryal Ozel¨
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Constraints on Black-Hole Charges with the 2017 EHT Observations of M87*
PHYSICAL REVIEW D 103, 104047 (2021) Constraints on black-hole charges with the 2017 EHT observations of M87* – Prashant Kocherlakota ,1 Luciano Rezzolla,1 3 Heino Falcke,4 Christian M. Fromm,5,6,1 Michael Kramer,7 Yosuke Mizuno,8,9 Antonios Nathanail,9,10 H´ector Olivares,4 Ziri Younsi,11,9 Kazunori Akiyama,12,13,5 Antxon Alberdi,14 Walter Alef,7 Juan Carlos Algaba,15 Richard Anantua,5,6,16 Keiichi Asada,17 Rebecca Azulay,18,19,7 Anne-Kathrin Baczko,7 David Ball,20 Mislav Baloković,5,6 John Barrett,12 Bradford A. Benson,21,22 Dan Bintley,23 Lindy Blackburn,5,6 Raymond Blundell,6 Wilfred Boland,24 Katherine L. Bouman,5,6,25 Geoffrey C. Bower,26 Hope Boyce,27,28 – Michael Bremer,29 Christiaan D. Brinkerink,4 Roger Brissenden,5,6 Silke Britzen,7 Avery E. Broderick,30 32 Dominique Broguiere,29 Thomas Bronzwaer,4 Do-Young Byun,33,34 John E. Carlstrom,35,22,36,37 Andrew Chael,38,39 Chi-kwan Chan,20,40 Shami Chatterjee,41 Koushik Chatterjee,42 Ming-Tang Chen,26 Yongjun Chen (陈永军),43,44 Paul M. Chesler,5 Ilje Cho,33,34 Pierre Christian,45 John E. Conway,46 James M. Cordes,41 Thomas M. Crawford,22,35 Geoffrey B. Crew,12 Alejandro Cruz-Osorio,9 Yuzhu Cui,47,48 Jordy Davelaar,49,16,4 Mariafelicia De Laurentis,50,9,51 – Roger Deane,52 54 Jessica Dempsey,23 Gregory Desvignes,55 Sheperd S. Doeleman,5,6 Ralph P. Eatough,56,7 Joseph Farah,6,5,57 Vincent L. -
Newpointe-Catalog
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Naming the Extrasolar Planets
Naming the extrasolar planets W. Lyra Max Planck Institute for Astronomy, K¨onigstuhl 17, 69177, Heidelberg, Germany [email protected] Abstract and OGLE-TR-182 b, which does not help educators convey the message that these planets are quite similar to Jupiter. Extrasolar planets are not named and are referred to only In stark contrast, the sentence“planet Apollo is a gas giant by their assigned scientific designation. The reason given like Jupiter” is heavily - yet invisibly - coated with Coper- by the IAU to not name the planets is that it is consid- nicanism. ered impractical as planets are expected to be common. I One reason given by the IAU for not considering naming advance some reasons as to why this logic is flawed, and sug- the extrasolar planets is that it is a task deemed impractical. gest names for the 403 extrasolar planet candidates known One source is quoted as having said “if planets are found to as of Oct 2009. The names follow a scheme of association occur very frequently in the Universe, a system of individual with the constellation that the host star pertains to, and names for planets might well rapidly be found equally im- therefore are mostly drawn from Roman-Greek mythology. practicable as it is for stars, as planet discoveries progress.” Other mythologies may also be used given that a suitable 1. This leads to a second argument. It is indeed impractical association is established. to name all stars. But some stars are named nonetheless. In fact, all other classes of astronomical bodies are named. -
CONSTELLATION BOÖTES, the HERDSMAN Boötes Is the Cultivator Or Ploughman Who Drives the Bears, Ursa Major and Ursa Minor Around the Pole Star Polaris
CONSTELLATION BOÖTES, THE HERDSMAN Boötes is the cultivator or Ploughman who drives the Bears, Ursa Major and Ursa Minor around the Pole Star Polaris. The bears, tied to the Polar Axis, are pulling a plough behind them, tilling the heavenly fields "in order that the rotations of the heavens should never cease". It is said that Boötes invented the plough to enable mankind to better till the ground and as such, perhaps, immortalizes the transition from a nomadic life to settled agriculture in the ancient world. This pleased Ceres, the Goddess of Agriculture, so much that she asked Jupiter to place Boötes amongst the stars as a token of gratitude. Boötes was first catalogued by the Greek astronomer Ptolemy in the 2nd century and is home to Arcturus, the third individual brightest star in the night sky, after Sirius in Canis Major and Canopus in Carina constellation. It is a constellation of large extent, stretching from Draco to Virgo, nearly 50° in declination, and 30° in right ascension, and contains 85 naked-eye stars according to Argelander. The constellation exhibits better than most constellations the character assigned to it. One can readily picture to one's self the figure of a Herdsman with upraised arm driving the Greater Bear before him. FACTS, LOCATION & MAP • The neighbouring constellations are Canes Venatici, Coma Berenices, Corona Borealis, Draco, Hercules, Serpens Caput, Virgo, and Ursa Major. • Boötes has 10 stars with known planets and does not contain any Messier objects. • The brightest star in the constellation is Arcturus, Alpha Boötis, which is also the third brightest star in the night sky. -
The Night Sky December
The Night Sky December Equipment you will need Because of the darkness of our forest locations, you can see many wonders of the night skies with your naked eye, although your eyes will Boötes need a good 20 minutes to adjust to the darkness. Any bright lights, such as that from your torch, will set them back again. You can reduce this effect by putting a red filter on your torch. Equipment worth investing in includes: Lynx • Binoculars – cheaper and easier to carry than a telescope. Look for ones with glass lenses. • Camera – to capture that fantastic star scene forever • Tripod – essential for use with your camera • Telescope – worth investing in for the really committed stargazer • Google Skymaps – a superb free app, available for Android and Delphinius iPhone. You point your phone towards the sky and it shows you the constellations and identifies the stars using inbuilt GPS Lepus Getting started – your first 5 constellations to spot • Ursa Major (the Big Dipper) has been used by sailors since ancient times to locate the fixed-point Pole Star and navigate home • Leo (the lion) is it a lion, as the Greeks decided? Or is it K9 from Doctor Who? • Cassiopeia (the queen of Aethiopia) is one of the easiest constellations to locate and looks like a huge W, almost directly overhead • Cepheus (the king of Aethiopia) is one of 48 constellations Eridanus identified by 2nd century astronomer Ptolemy. Imagine a child’s drawing of a house, complete with roof • Orion (the hunter), with belt and sword, is perhaps the most famous constellation – and one of the few that actually bears some slight resemblance to its namesake Stargazing facts for kids • You can see the International Space Station without using binoculars, and you can track it moving across the sky • The sun is 300,000 times bigger than earth and 93 million miles Boötes Lynx Delphinus Lepus Eridanus away. -
Oriontelescopes.Com Oct
THE EVENING SKY FOR OCTOBER, 2014 NORTH Early October — 10 p.m. Mid October — 9 p.m. URSA MAJOR Late October — 8 p.m. Pointers Big Dipper M51 ζ M81 Winter Hexagon2281 M82 κ M101 LYNX BOÖTES URSA μ M37 AURIGA MINOR M I L K Y W A Y DRACO CAMELOPARDALIS M36 Polaris Little Dipper M38 Capella α CORONA 16,17 BOREALIS ε M1 6543 ν M13 SERPENS CAPUT Double M92 Cluster CEPHEUS Keystone M103 ρ 457 Algol β PERSEUS η M52 Aldebaran μ E M34 δ Vega C 7789 ε Double-Double L γ Hyades I M45 CASSIOPEIA ζ HERCULES P Pleiades M39 Deneb LYRA T TRIANGULUM ORION I M31 α C 7243 M57 752 M110 CYGNUS EAST 7000 M29 χ M32 61 M56 (P a M33 6871 th β o ANDROMEDA Albireo f ARIES OPHIUCHUS WEST S LACERTA Summer Triangle u n TAURUS & VULPECULA I.4665 p γ M27 la n 6633 et s) SAGITTA E 70 Q Great Square DELPHINUS U γ A T γ PISCES of Pegasus O ϑ M14 R PEGASUS M15 Altair Uranus α γ ζ SERPENS EQUULEUS CAUDA Mira ο TX AQUILA M I L KM11 Y W A Y SCUTUM M26 ζ M2 M16 ERIDANUS M17 Neptune M18 AQUARIUS α M24 M25 CETUS M28 M22 7293 FORNAX 253 M30 SAGITTARIUS CAPRICORNUS Teapot Fomalhaut M55 SCULPTOR PISCIS AUSTRINUS 0 55 MICROSCOPIUM 0 20 Star magnitudes N IO R TI Moon IL PHOENIX W Phases GRUS –1 012345 FIRST Oct. 1 SOUTH Double star FULL How To Use This Chart Variable star Oct. -
Chasing Constellations
MITCHELL, GRACE LYN Gracelyn Mitchell Age: 17, Grade: 12 Home School, Wetumpka, AL Educator: Shunta McCants Category: Personal Essay & Memoir Chasing Constellations I stood in the wet grass, scrunching my toes in and out, letting the cool dew drops fall on my bare feet. My thin, white sundress and my thin, almost-white hair fluttering around me in the wind. I stood firmly, watching the glow of what felt like trillions of fireflies fade in and out. Each time the one I had my gaze set on flickered out, I would close my eyes and inhale deeply, breathing in the scent of summer air and what I can still only describe as “magic”. The cool air on my sticky, sweaty skin felt good. My stomach still churned with nausea from seconds ago when my cousin and her best friend twirled me around on the “swing” made from a single branch and piece of rope tied to a tree in their backyard...over, and over, and over. But I still giggled past the dizziness every time. I smiled and laughed to myself. My heart fluttered and my veins surged with what I look back on as “child euphoria”. My cousin, with long, steaming brown hair, ran up beside me followed by her friend. Still giggling, she grasped my shoulders and pointed to the sky. “You see that, Grace? That’s the pegasus constellation.” She pointed to an outline of stars that unmistakably made up the image of a chubby pegasus with a bridle and saddle and very two-dimensional wings. It wasn’t one of those constellations that you had to squint at, or one that you had to imagine most of the image yourself for. -
These Sky Maps Were Made Using the Freeware UNIX Program "Starchart", from Alan Paeth and Craig Counterman, with Some Postprocessing by Stuart Levy
These sky maps were made using the freeware UNIX program "starchart", from Alan Paeth and Craig Counterman, with some postprocessing by Stuart Levy. You’re free to use them however you wish. There are five equatorial maps: three covering the equatorial strip from declination −60 to +60 degrees, corresponding roughly to the evening sky in northern winter (eq1), spring (eq2), and summer/autumn (eq3), plus maps covering the north and south polar areas to declination about +/− 25 degrees. Grid lines are drawn at every 15 degrees of declination, and every hour (= 15 degrees at the equator) of right ascension. The equatorial−strip maps use a simple rectangular projection; this shows constellations near the equator with their true shape, but those at declination +/− 30 degrees are stretched horizontally by about 15%, and those at the extreme 60−degree edge are plotted twice as wide as you’ll see them on the sky. The sinusoidal curve spanning the equatorial strip is, of course, the Ecliptic −− the path of the Sun (and approximately that of the planets) through the sky. The polar maps are plotted with stereographic projection. This preserves shapes of small constellations, but enlarges them as they get farther from the pole; at declination 45 degrees they’re about 17% oversized, and at the extreme 25−degree edge about 40% too large. These charts plot stars down to magnitude 5, along with a few of the brighter deep−sky objects −− mostly star clusters and nebulae. Many stars are labelled with their Bayer Greek−letter names. Also here are similarly−plotted maps, based on galactic coordinates. -
Separating Accretion and Mergers in the Cosmic Growth of Black Holes with X-Ray and Gravitational Wave Observations
Draft version May 4, 2020 Typeset using LATEX twocolumn style in AASTeX61 SEPARATING ACCRETION AND MERGERS IN THE COSMIC GROWTH OF BLACK HOLES WITH X-RAY AND GRAVITATIONAL WAVE OBSERVATIONS Fabio Pacucci1, 2 and Abraham Loeb1, 2 1Black Hole Initiative, Harvard University, Cambridge, MA 02138, USA 2Center for Astrophysics j Harvard & Smithsonian, Cambridge, MA 02138, USA ABSTRACT Black holes across a broad range of masses play a key role in the evolution of galaxies. The initial seeds of black holes formed at z ∼ 30 and grew over cosmic time by gas accretion and mergers. Using observational data for quasars and theoretical models for the hierarchical assembly of dark matter halos, we study the relative importance of gas accretion and mergers for black hole growth, as a function of redshift (0 < z < 10) and black hole mass 3 10 (10 M < M• < 10 M ). We find that (i) growth by accretion is dominant in a large fraction of the parameter 8 5 space, especially at M• > 10 M and z > 6; and (ii) growth by mergers is dominant at M• < 10 M and z > 5:5, 8 and at M• > 10 M and z < 2. As the growth channel has direct implications for the black hole spin (with gas accretion leading to higher spin values), we test our model against ∼ 20 robust spin measurements available thus far. As expected, the spin tends to decline toward the merger-dominated regime, thereby supporting our model. The next generation of X-ray and gravitational-wave observatories (e.g. Lynx, AXIS, Athena and LISA) will map out populations of black holes up to very high redshift (z ∼ 20), covering the parameter space investigated here in almost its entirety. -
Press Kit Draft(1)
B L A C K H O L E S -------------- T H E E D G E O F A L L W E K N O W A film by Peter Galison Contact: Director/Producer: Peter Galison, [email protected] Editor/Co-Producer: Chyld King, [email protected] Distribution: Submarine Entertainment, [email protected] Media: [email protected] Online: www.blackholefilm.com Runtime: 98 min www.blackholefilm.com 1 About the Film Logline Black holes stand at the edge of the knowable universe. The Event Horizon Telescope pursues the first picture of a black hole; Stephen Hawking and collaborators attack the black hole paradox at the heart of physics. Black Holes | The Edge of All We Know follows observers, theorists, and philosophers hunting these most mysterious objects. Synopsis What can black holes teach us about the boundaries of knowledge? These holes in spacetime are the darkest objects and the brightest—the simplest and the most complex. With unprecedented access, Black Holes | The Edge of All We Know follows two powerhouse collaborations. Stephen Hawking anchors one, striving to show that black holes do not annihilate the past. Another group, working in the world’s highest altitude observatories, creates an earth-sized telescope to capture the first-ever image of a black hole. Interwoven with other dimensions of exploring black holes, these stories bring us to the pinnacle of humanity’s quest to understand the universe. www.blackholefilm.com 2 www.blackholefilm.com 3 Director’s Statement I began filming Black Holes | The Edge of All We Know in the spring of 2016, when five colleagues and I launched the Black Hole Initiative, an interdisciplinary center for the study of black holes. -
Curriculum Vitae – Edo Berger
Curriculum Vitae – Edo Berger Professor of Astronomy Harvard College Observatory, MS-19, 60 Garden Street, Cambridge, MA 02138 [email protected] https://scholar.harvard.edu/eberger Education Ph.D., Astrophysics, California Institute of Technology May 2004 Advisor: Prof. Shrinivas R. Kulkarni Cosmic Explosions: The Beasts and Their Lair M.S., Astrophysics, California Institute of Technology May 2001 Advisor: Prof. Shrinivas R. Kulkarni B.S., Astrophysics (Summa Cum Laude), University of California, Los Angeles June 1999 Advisor: Prof. Bernard M. K. Nefkens The Total and Differential Cross Sections of the Reaction K−p → Λη. Positions Professor of Astronomy, Harvard University 2014– John L. Loeb Associate Professor of the Natural Sciences, Harvard University 2011–2014 Associate Professor of Astronomy, Harvard University 2011–2014 Assistant Professor, Harvard University 2008–2011 Carnegie-Princeton Postdoctoral Fellow, Princeton /Carnegie Observatories 2004–2008 Hubble Postdoctoral Fellow, Carnegie Observatories 2004–2007 Honors and Awards CSH Distinguished Lectures University of Bern 2018 Star Family Challenge for Promising Scientific Research, Harvard University 2016 Fannie Cox Prize for Excellence in Science Teaching, Harvard University 2013 Robert J. Trumpler Award for an Outstanding PhD Thesis, Astronomical Society 2007 of the Pacific Kingsley Fellowship, California Institute of Technology 2002 E. Lee Kinsey Prize, University of California, Los Angeles 1999 Professional Services SOC, “10th Sackler Conference in Theoretical Astrophysics: -
The Black Hole Initiative Harvard University 20 Garden Street Cambridge, MA 02138 617-496-8956
The Black Hole Initiative Harvard University 20 Garden Street Cambridge, MA 02138 https://bhi.fas.harvard.edu/ 617-496-8956 Press Contact: Barbara Elfman, BHI Administrator Phone: +1-617-496-8956 Email: [email protected] Date: July 26, 2018 FOR IMMEDIATE RELEASE Harvard University Black Hole Initiative Essay Competition Call for Submissions Awards Up to $10,000 for Interdisciplinary Essays Exploring the Latest Research into Black Holes Cambridge, MA—The Black Hole Initiative (BHI) at Harvard University announces the first-ever Black Hole Essay Competition, inviting submissions that explore novel connections and new perspectives on black hole research. The BHI awards, including a $10,000 First Prize, will be given to authors of highly engaging 1,500-word articles that effectively connect a non-expert audience with the growing field of black hole science. The deadline for submissions has been extended to September 1, 2018. As region of spacetime with a gravitational field so intense that not even light can escape— black holes are fascinating to scientists and the general public alike. Capturing the attention of world- renowned researchers, the understanding of black holes is at the nexus of the BHI’s worldwide research effort. By combining expertise in the fields of Astronomy, Mathematics, Philosophy, Physics, and History, the BHI is focusing new attention on black holes in hopes of illuminating their nature. “The Black Hole Initiative offers a unique environment for thinking about the topic of black holes more creatively and comprehensively”, says BHI director, Avi Loeb. “This is the approach we want to encourage from competition authors that boldly explore the topic and make it approachable for a wider audience”, add Shep Doeleman, who is a senior member of the BHI and director of the Event Horizon Telescope project.