Crux of the Hindu and PIB Vol 73
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Matt Brorby (U of Iowa) with Philip Kaaret (U of Iowa)
Matt Brorby (U of Iowa) with Philip Kaaret (U of Iowa) Illustration: NASA/CXC/M.Weiss http://chandra.harvard.edu/ Outline • Why study ULX vs metallicity? • Observations: Einstein, ROSAT, etc: N"#$ ,�"#$ ∝ SFR • Recent studies: N"#$, �"#$ /SFR vs Metallicity • Does spectral state depend on metallicity? • How could metallicity affect ULX population? • Outlook for observable properties of ULX-metallicity effects Why? • Knowing the effects of metallicity on the properties of ULX will lead us to understanding more about the early Universe X-rays in the early Universe • Knowing the effects of metallicity on the properties of ULX will lead us to understanding more about the early Universe • Recombination • � ∼ 1000 • Dark Ages • 20 < � < 1000 • Reionization • 6 < � < 20 • Currently • Ionized and warm (IGM) X-rays in the early Universe • X-rays have a large mean free path, ; A.C � (cMpc) ∝ < 5 =>> ?@ (see McQuinn2012; Mesinger+2013; Pacucci+2014) • Allows for more uniform ionization • Most of X-ray energy is deposited as heat (left over energy after ionization) (Shull & van Steenberg 1985) • Would delay the end of reionization due to thermal feedback X-rays in the early Universe (Fialkov, Barkana, & Visbal 2014) • Fiducial model of X-ray emission D • < = 3×10K>� [erg sRS MRS yr] EFG $ ⊙ • � $ = 1 • Reduced X-ray emission S • �$ = S> Soft XRB spectrum • Enhanced X-ray emission Hard XRB spectrum • �$ = 10 • Minimum of curve is beginning of X- ray heating. (Fialkov, Barkana, & Visbal 2014) • Above �AS = 0, reionization begins. X-rays in the early Universe (MiroCha 2014) Gravitational Waves from BH-BH binary LIGO Scientific Collaboration and Virgo Collaboration (2016) • Initial black hole masses of XY XK 36RK M⊙ and 29RK M⊙ XK • Final mass of 62RK M⊙ • “The formation of such massive black holes from stellar evolution requires weak massive-star winds, which are possible in stellar environments with metallicity lower than ≈ 0.5 �⊙.” Abbott et al. -
Modi Launches Rs One Lakh Cr Fund for Farmers
WWW.YUGMARG.COM FOLLOW US ON REGD NO. CHD/0061/2006-08 | RNI NO. 61323/95 Join us at telegram https://t.me/yugmarg Monday, August 10, 2020 CHANDIGARH, VOL. XXV, NO. 184, PAGES 8, RS. 2 YOUR REGION, YOUR PAPER Haryana CM CM dedicates Rajasthan CM Loyalty above Manohar Lal projects worth confident of everything, launches Anti- Rs. 80 crore in Sullah proving can't wait Bullying campaign of area; Inaugurates PHC majority in for what's to building at Daroh Assembly session Faridabad police come': Kohli on IPL 2020 PAGE 3 PAGE 5 PAGE 6 PAGE 8 Modi launches Rs One lakh cr fund for farmers AGENCY cility of Rs 1 lakh crore under the Agri- their produce, as they will be able to store NEW DELHI, AUG 9 'Kisan Rail' scheme to culture Infrastructure Fund." and sell at higher prices, reduce wastage "In this programme, the sixth install- and increase processing and value addi- Prime Minister Narendra Modi on Sun- benefit farmers ment of the assistance amount under tion. Rs 1 lakh crore will be sanctioned day launched the financing facility of Rs NEW DELHI: Prime Minister Narendra 'PM-Kisan scheme' will also be released. under the financing facility in partnership 1 lakh crore under Agriculture Infra- Modi on Sunday said that the "Kisan Rail" Rs 17,000 crores will be transferred to with multiple lending institutions," read structure Fund and releases the sixth in- scheme will benefit farmers of the entire the accounts of 8.5 crore farmers. The a release by the Prime Minister's Office Badnore tests country as they would be able to sell their stallment of funds under the Pradhan produce in urban areas. -
Alactic Observer
alactic Observer G John J. McCarthy Observatory Volume 14, No. 2 February 2021 International Space Station transit of the Moon Composite image: Marc Polansky February Astronomy Calendar and Space Exploration Almanac Bel'kovich (Long 90° E) Hercules (L) and Atlas (R) Posidonius Taurus-Littrow Six-Day-Old Moon mosaic Apollo 17 captured with an antique telescope built by John Benjamin Dancer. Dancer is credited with being the first to photograph the Moon in Tranquility Base England in February 1852 Apollo 11 Apollo 11 and 17 landing sites are visible in the images, as well as Mare Nectaris, one of the older impact basins on Mare Nectaris the Moon Altai Scarp Photos: Bill Cloutier 1 John J. McCarthy Observatory In This Issue Page Out the Window on Your Left ........................................................................3 Valentine Dome ..............................................................................................4 Rocket Trivia ..................................................................................................5 Mars Time (Landing of Perseverance) ...........................................................7 Destination: Jezero Crater ...............................................................................9 Revisiting an Exoplanet Discovery ...............................................................11 Moon Rock in the White House....................................................................13 Solar Beaming Project ..................................................................................14 -