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Formation of Galaxies in the Context of Gravitational Waves and Primordial Black Holes
Journal of Modern Physics, 2019, 10, 214-224 http://www.scirp.org/journal/jmp ISSN Online: 2153-120X ISSN Print: 2153-1196 Formation of Galaxies in the Context of Gravitational Waves and Primordial Black Holes Shawqi Al Dallal1, Walid J. Azzam2* 1College of Graduate Studies and Research, Ahlia University, Manama, Bahrain 2Department of Physics, College of Science, University of Bahrain, Sakhir, Bahrain How to cite this paper: Al Dallal, S. and Abstract Azzam, W.J. (2019) Formation of Galaxies in the Context of Gravitational Waves and The recent discovery of gravitational waves has revolutionized our under- Primordial Black Holes. Journal of Modern standing of many aspects regarding how the universe works. The formation Physics, 10, 214-224. of galaxies stands as one of the most challenging problems in astrophysics. https://doi.org/10.4236/jmp.2019.103016 Regardless of how far back we look in the early universe, we keep discovering Received: January 23, 2019 galaxies with supermassive black holes lurking at their centers. Many models Accepted: March 1, 2019 have been proposed to explain the rapid formation of supermassive black Published: March 4, 2019 holes, including the massive accretion of material, the collapse of type III Copyright © 2019 by author(s) and stars, and the merger of stellar mass black holes. Some of these events give Scientific Research Publishing Inc. rise to the production of gravitational waves that could be detected by future This work is licensed under the Creative generations of more sensitive detectors. Alternatively, the existence of these Commons Attribution International License (CC BY 4.0). supermassive black holes can be explained in the context of primordial black http://creativecommons.org/licenses/by/4.0/ holes. -
Formation of the First Stars
Formation of the First Stars Volker Bromm Department of Astronomy, University of Texas, 2511 Speedway, Austin, TX 78712, USA E-mail: [email protected] Abstract. Understanding the formation of the first stars is one of the frontier topics in modern astrophysics and cosmology. Their emergence signalled the end of the cosmic dark ages, a few hundred million years after the Big Bang, leading to a fundamental transformation of the early Universe through the production of ionizing photons and the initial enrichment with heavy chemical elements. We here review the state of our knowledge, separating the well understood elements of our emerging picture from those where more work is required. Primordial star formation is unique in that its initial conditions can be directly inferred from the Λ Cold Dark Matter (ΛCDM) model of cosmological structure formation. Combined with gas cooling that is mediated via molecular hydrogen, one can robustly identify the regions of primordial star formation, 6 the so-called minihalos, having total masses of 10 M⊙ and collapsing at redshifts ∼ z 20 30. Within this framework, a number of studies have defined a preliminary ≃ − standard model, with the main result that the first stars were predominantly massive. This model has recently been modified to include a ubiquitous mode of fragmentation in the protostellar disks, such that the typical outcome of primordial star formation may be the formation of a binary or small multiple stellar system. We will also discuss extensions to this standard picture due to the presence of dynamically significant magnetic fields, of heating from self-annihalating WIMP dark matter, or cosmic rays. -
How Do the Grateful Dead and Deadheads 'Mean'?
Matthew Tift University of Wisconsin-Madison “How Do the Grateful Dead and Deadheads ‘Mean’?” 09 March 2001 What exactly is a work of music? Is it the sounds we hear? Is it the sounds we are intended to hear? Is a musical work something that can only be defined using metaphors? Must it be organized sound? Is it beyond definition? About the only acceptable answer to these ontological questions is that the nature of a musical work is not universally understood. Nevertheless, by phrasing questions of musical identity differently, some popular music scholars find answers that are more rewarding. Richard Middleton, a well-respected popular music scholar, points out, “popular music analysis has insisted . on the priority of meaning.”1 One method for discussing meaning is to foreground questions of process, thereby avoiding questions of product. Simon Frith, another doyen of popular music studies, writes, “too often attempts to relate musical forms to social processes ignore the ways in which music is itself a social process.”2 By concentrating on social processes, one can more easily address such issues as musical meaning and social significance. This variety of analysis is sometimes described as process philosophy.3 Christopher Small’s advocation of process philosophy is perhaps the most resonant. Small is concerned with questions that address how musical activities are interconnected. In his 1998 book, Musicking, Christopher Small challenges the dominant Western idea of music as a thing and explores the idea of music as an activity. In fact, he creates a new word specifically for 1 Middleton, Reading Pop, 104. -
Press Contacts: Madelyn Gardner, (413) 448-8084 X15 [email protected]
Press Contacts: Madelyn Gardner, (413) 448-8084 x15 [email protected] www.BerkshireTheatreGroup.org Rebecca Brighenti, (413) 448-8084 x11 [email protected] www.BerkshireTheatreGroup.org For immediate release, please: October 3, 2017 Jefferson Airplane, Jefferson Starship, Hot Tuna and Grateful Dead Alumni Reunite for The Airplane Family with Live Dead ’69 at the Colonial Pittsfield, MA– Berkshire Theatre Group welcomes The Airplane Family with Live Dead ’69 to The Colonial Theatre on Friday, October 27 at 8pm. Tickets are $25 and $50. The Airplane Family reunites Jefferson Airplane, Jefferson Starship, Hot Tuna, Grateful Dead & New Riders of The Purple Sage alumni & legacy/family, and other musical luminaries, comprising a veritable “Who’s Who” of “The Summer of Love’s” legendary musicians. The Airplane Family with Live Dead ’69 fresh off their critically acclaimed 2016 inaugural tour, add 2 members of The New Riders, and continue in 2017 to celebrate the 50th Anniversary of “The San Francisco Sound." The halcyon era performers are: Tom Constanten, Grateful Dead’s original pianist, inducted into The Rock Hall of Fame in 1995. Slick Aguilar, Jefferson Starship lead guitarist (1992-2015), also David Crosby Band lead guitarist (1983-1986). Since co founding The Kantner, Balin, Casady Band in 1985, Aguilar performed longer with the late Paul Kantner & with Marty Balin - and played the songs of Jefferson Airplane and Jefferson Starship more than any other musician ever. Mark Karan, lead guitarist with Bob Weir’s Rat Dog and The Other Ones for 14 years, now also appears with Phil Lesh & the Terrapin Family Band. Mike Falzarano, a long time member of Jefferson Airplane spinoff Hot Tuna in the 1980s; and, in recent years, helped forge and lead a resurgent, acclaimed iteration of Grateful Dead spinoff, The New Riders Of The Purple Sage. -
Lecture Thirteen
Upcoming Astronomy-themed Talks and Events Tuesday, 2/18, 12-1pm Astro Lunch – Phys-Astr B305 – Jessica Werk, (UW) – “Experiments to build off accurate distances to molecular/dust clouds”. Thursday, 2/20, 3:45-5:00p Astronomy Colloquium – Phys- Astr A102 – Anthony Pullen (NYU) – “Line Intensity Mapping: Modeling & Analysis in the Precision Era”. ??? We saw last time how the mass of a star determines what sort of ‘corpse’ it leaves behind once fusion has ceased in its core. 1 Schematics of a White Dwarf and a Neutron Star (Note: Sizes not to scale!) Since they generate no fusion energy, White Dwarfs and Neutron Stars fend off gravity via ‘degeneracy pressure’ – from tightly packed, relativistic electrons in the case of a White Dwarf, and from neutrons in the case of a Neutron Star. This image is a bit better to scale – recall that White Dwarfs are about the size of the Earth, while Neutron Stars are much smaller, about the size of a city. Yet they are more massive than White Dwarfs, and the gravitational forces near their surfaces are much, much stronger – Vancouver would not survive this encounter! 2 White Dwarfs can eventually do some more fusing – but only if they are in a binary system and gravitationally ‘cannibalize’ hydrogen from their companion. This fusion can take the form of a relatively (!) small, surface- level eruption called a “nova” – but if enough mass is transferred to get above the Chandrasekhar Limit of about 1.4 times the mass of the Sun one can get a “White Dwarf Supernova”. Accretion onto Neutron Stars can also produce -
Dark Stars: Dark Matter Annihilation in the First Stars
Dark Stars: Dark Matter Annihilation in the First Stars. Katherine Freese (Univ. of MI) Phys. Rev. Lett. 98, 010001 (2008),arxiv:0705.0521 D. Spolyar , K .Freese, and P. Gondolo PAPER 1 arXiv:0802.1724 K. Freese, D. Spolyar, and A. Aguirre arXiv:0805.3540 K. Freese, P. Gondolo, J.A. Sellwood, and D. Spolyar arXiv:0806.0617 K. Freese, P. Bodenheimer, D. Spolyar, and P. Gondolo DS, PB, KF, PG arXiv:0903.3070 And N. Yoshida Collaborators Spiritual Leader Dark Stars The first stars to form in the history of the universe may be powered by Dark Matter annihilation rather than by Fusion (even though the dark matter constitutes less than 1% of the mass of the star). • This new phase of stellar evolution may last over a million years First Stars: Standard Picture • Formation Basics: – First luminous objects ever. – At z = 10-50 6 – Form inside DM haloes of ~10 M – Baryons initially only 15% – Formation is a gentle process Made only of hydrogen and helium from the Big Bang. Dominant cooling Mechanism is H2 Not a very good coolant (Hollenbach and McKee ‘79) Pioneers of First Stars Research: Abel, Bryan, Norman; Bromm, Greif, and Larson; McKee and Tan; Gao, Hernquist, Omukai, and Yoshida; Klessen The First Stars Also The First Structure • Important for: • End of Dark Ages. • Reionize the universe. • Provide enriched gas for later stellar generations. • May be precursors to black holes which power quasars. Our Results • Dark Matter (DM) in haloes can dramatically alter the formation of the first stars leading to a new stellar phase driven by DM annihilation. -
124720 Aaron Read Lowres
Dead Hart Live Beat by Amy Brown Born in the war year of 1943 in New York, Mickey bearded guitar player who had a voice that finger touched your Hart's parents were drummers. soul and kissed your neck. Jerry stepped up when R & B genius Although he didn't stay around to enjoy Mickey's birth, Pigpen McKernan forgot there were closing times and his dad was a 'rudimental' drummer, a master of establishing checked out of the band and life too early. Bob Weir was there, tempo through percussion and acting as the backbone of an too, the cute one with an edge, who alternated vocals with ensemble. Mickey was raised by his mother, who was what Jerry, and Phil Lesh and hey…they all had their following, but Mickey calls an 'intramural' player, a musician with a true love for this article at least and a sense of Rock history, it is of rhythm and its many artistic expressions. impossible to ignore the impact that Mickey Hart has had on Whether it was in his blood or an imprint of early the world of rhythm and percussion beginning with his days memory, Hart embarked on a lifetime of exploration into the with “The Dead” and continuing with the groups he has either artistry and healing powers of drumming. In 1967, with the joined or founded since Jerry Garcia's challenged heart gave Summer of Love in full blossom, Mickey fell in with a group out in 1995. of musicians from Northern California. They were a free- “ My teacher took me aside when I was in spirited and experimental group of high school and asked, “Do you want to guys who would become his lifelong play drums for the rest of your life?” companions. -
The Sixties Counterculture and Public Space, 1964--1967
University of New Hampshire University of New Hampshire Scholars' Repository Doctoral Dissertations Student Scholarship Spring 2003 "Everybody get together": The sixties counterculture and public space, 1964--1967 Jill Katherine Silos University of New Hampshire, Durham Follow this and additional works at: https://scholars.unh.edu/dissertation Recommended Citation Silos, Jill Katherine, ""Everybody get together": The sixties counterculture and public space, 1964--1967" (2003). Doctoral Dissertations. 170. https://scholars.unh.edu/dissertation/170 This Dissertation is brought to you for free and open access by the Student Scholarship at University of New Hampshire Scholars' Repository. It has been accepted for inclusion in Doctoral Dissertations by an authorized administrator of University of New Hampshire Scholars' Repository. For more information, please contact [email protected]. INFORMATION TO USERS This manuscript has been reproduced from the microfilm master. UMI films the text directly from the original or copy submitted. Thus, some thesis and dissertation copies are in typewriter face, while others may be from any type of computer printer. The quality of this reproduction is dependent upon the quality of the copy submitted. Broken or indistinct print, colored or poor quality illustrations and photographs, print bleedthrough, substandard margins, and improper alignment can adversely affect reproduction. In the unlikely event that the author did not send UMI a complete manuscript and there are missing pages, these will be noted. Also, if unauthorized copyright material had to be removed, a note will indicate the deletion. Oversize materials (e.g., maps, drawings, charts) are reproduced by sectioning the original, beginning at the upper left-hand comer and continuing from left to right in equal sections with small overlaps. -
Jerry Garcia Song Book – Ver
JERRY GARCIA SONG BOOK – VER. 9 1. After Midnight 46. Chimes of Freedom 92. Freight Train 137. It Must Have Been The 2. Aiko-Aiko 47. blank page 93. Friend of the Devil Roses 3. Alabama Getaway 48. China Cat Sunflower 94. Georgia on My Mind 138. It Takes a lot to Laugh, It 4. All Along the 49. I Know You Rider 95. Get Back Takes a Train to Cry Watchtower 50. China Doll 96. Get Out of My Life 139. It's a Long, Long Way to 5. Alligator 51. Cold Rain and Snow 97. Gimme Some Lovin' the Top of the World 6. Althea 52. Comes A Time 98. Gloria 140. It's All Over Now 7. Amazing Grace 53. Corina 99. Goin' Down the Road 141. It's All Over Now Baby 8. And It Stoned Me 54. Cosmic Charlie Feelin' Bad Blue 9. Arkansas Traveler 55. Crazy Fingers 100. Golden Road 142. It's No Use 10. Around and Around 56. Crazy Love 101. Gomorrah 143. It's Too Late 11. Attics of My Life 57. Cumberland Blues 102. Gone Home 144. I've Been All Around This 12. Baba O’Riley --> 58. Dancing in the Streets 103. Good Lovin' World Tomorrow Never Knows 59. Dark Hollow 104. Good Morning Little 145. Jack-A-Roe 13. Ballad of a Thin Man 60. Dark Star Schoolgirl 146. Jack Straw 14. Beat it on Down The Line 61. Dawg’s Waltz 105. Good Time Blues 147. Jenny Jenkins 15. Believe It Or Not 62. Day Job 106. -
Jerry Garcia Paintings & Drawings: 1961–1995
ART EXHIBITION Jerry Garcia Paintings & Drawings: 1961–1995 June 12—September 6, 2020 This summer, the San Francisco Art Institute (SFAI) presents the first survey of legendary musician Jerry Garcia’s lifelong visual art practice. Garcia, born and raised in San Francisco and a lifelong Bay Area resident, was deeply influenced by the city's colorful and diverse cultures. When he was a teenager, Garcia studied visual art at SFAI (then called the California School of Fine Arts) with teachers including Wally Hedrick, a seminal American visual artist of the Bay Area Beat Generation. Garcia's painting and drawing practice continued throughout his life and provided a creative refuge in an extremely public and successful career. The exhibition includes more than 60 works, both figurative and abstract, including ink and charcoal drawings, watercolors, and digital paintings, along with a selection of Garcia’s sketchbooks. It is curated by Andrew McClintock from the collection of Deborah Koons Garcia, Garcia’s widow who received her MFA in film at SFAI. Jerry Garcia was a composer, songwriter, and guitarist who played with The Jerry Garcia Band, the Grateful Dead, and David Grisman. General Information San Francisco Art Institute – Fort Mason’s galleries are open to the public Wednesday - Sunday 11am - 7pm and are located on Pier 2 within Fort Mason Center for Arts & Culture, 2 Marina Blvd., San Francisco, CA. Galleries are free to the public. For more information, the public may visit sfai.edu or call (415) 749-4563. MEDIA CONTACT Nina Sazevich Public Relations 415.752.2483 [email protected] . -
Grateful Dead Shakedown Street Mp3, Flac, Wma
Grateful Dead Shakedown Street mp3, flac, wma DOWNLOAD LINKS (Clickable) Genre: Rock / Funk / Soul Album: Shakedown Street Country: Australia Released: 1978 Style: Folk Rock, Country Rock, Funk, Disco MP3 version RAR size: 1920 mb FLAC version RAR size: 1889 mb WMA version RAR size: 1484 mb Rating: 4.1 Votes: 873 Other Formats: VQF MP3 MP2 AAC AIFF AUD MP4 Tracklist Hide Credits Good Lovin' A1 4:51 Written-By – A. Resnick*, R. Clark* France A2 4:03 Written By – Hart/Weir/HunterWritten-By – Bob Weir, Mickey Hart, Robert Hunter Shakedown Street A3 4:59 Written By – Garcia/HunterWritten-By – Jerry Garcia, Robert Hunter Serengetti A4 1:59 Written By – Hart/KreutzmannWritten-By – Bill Kreutzmann, Mickey Hart Fire On The Mountain A5 3:46 Written By – Hart/HunterWritten-By – Mickey Hart, Robert Hunter I Need A Miracle B1 3:36 Written By – Weir/BarlowWritten-By – Bob Weir, John Perry Barlow From The Heart Of Me B2 3:23 Horns – Steve SchusterWritten-By – D. Godchaux* Stagger Lee B3 3:25 Written By – Garcia/HunterWritten-By – Jerry Garcia, Robert Hunter B4 All New Minglewood Blues 4:12 If I Had The World To Give B5 4:50 Written By – Garcia/HunterWritten-By – Jerry Garcia, Robert Hunter Companies, etc. Manufactured By – EMI (Australia) Limited Credits Artwork By – Gilbert Shelton Co-producer – Dan Healy Engineer – Bob Matthews Harp – Matthew Kelly Mastered By – George Horn Percussion – Jordan Amarantha Producer – Lowell George Barcode and Other Identifiers Matrix / Runout (Runout Side A): AB.4198A Matrix / Runout (Runout Side B): AB.4198B-2 Other -
Grateful Dead Records: Artwork MS.332.Ser
http://oac.cdlib.org/findaid/ark:/13030/c8ff3qrq Online items available Grateful Dead Records: Artwork MS.332.Ser. 9 Wyatt Young, Alix Norton University of California, Santa Cruz 2018 1156 High Street Santa Cruz 95064 [email protected] URL: http://guides.library.ucsc.edu/speccoll Grateful Dead Records: Artwork MS.332.Ser. 9 1 MS.332.Ser. 9 Contributing Institution: University of California, Santa Cruz Title: Grateful Dead Records: Artwork Creator: Grateful Dead Productions Identifier/Call Number: MS.332.Ser. 9 Physical Description: 178 Linear Feet42 boxes, 9 map-case drawers, and 103 oversized items Date (inclusive): 1972-2012 Date (bulk): 1980-2008 Language of Material: English . https://www.gdao.org/ Access Collection is open for research. Advance notice is required to access large and framed items so that they can be retrieved from storage. Please contact Special Collections and Archives in advance to request access. Accruals The first accrual was received in 2008. A second accrual was received in June 2012. Acquisition Information Gift of Grateful Dead Productions, 2008 and 2012. Arrangement This collection is arranged in three series: Series 1: Business Art Series 2: Fan Art Series 3: Band Art Materials within each series are arranged alphabetically by last name of artist, where identified. Biography The Grateful Dead were an American rock band that formed in 1965 in Northern California. They came to fame as part of author Ken Kesey's Acid Tests, a series of multimedia happenings centered around then-legal LSD. Famed for their concerts, the band performed more than 2,300 shows over thirty years, disbanding after the death of lead guitarist Jerry Garcia in August 1995.