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Просмотр по теме "ISM: abundances"

Просмотр по теме "ISM: abundances"

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  • A Systematic TMRT Observational Study of Galactic <sup>12</sup>C/<sup>13</sup>C Ratios from Formaldehyde 
    Yan Y.; Zhang J.; Henkel C.; Mufakharov T.; Jia L.; Tang X.; Wu Y.; Li J.; Zeng Z.; Wang Y.; Li Y.; Huang J.; Jian J. (2019)
    © 2019. The American Astronomical Society. We present observations of the C-band 110-111 (4.8 GHz) and Ku-band 211-212 (14.5 GHz) K-doublet lines of H2CO and the C-band 110-111 (4.6 GHz) line of H213CO toward a large sample ...
  • Breaks in surface brightness profiles and radial abundance gradients in the discs of spiral galaxies 
    Pilyugin L.; Grebel E.; Zinchenko I.; Nefedyev Y.; Vílchez J. (2017)
    © ESO, 2017. We examine the relation between breaks in the surface brightness profiles and radial abundance gradients within the optical radius in the discs of 134 spiral galaxies from the CALIFA survey. The distribution ...
  • Element-abundance inhomogeneity of interstellar matter as it follows from the chemical composition of the O-type supergiants HDE 226868 (Cyg X-1) and α Cam 
    Bochkarev N.; Karitskaya E.; Shimanskii V.; Galazutdinov G. (2013)
    By means of synthetic spectrum modeling with non-LTE effects, we determined element abundances in the atmospheres of two O supergiants with similar physical characteristics: HDE 226868 (the optical component of Cyg X-1) ...
  • New calibrations for abundance determinations in HII regions 
    Pilyugin L.; Grebel E. (2016)
    © 2016 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society.Simple relations for deriving the oxygen abundance in HII regions with intensities of the three strong emission lines R2, ...
  • On the influence of the environment on galactic chemical abundances 
    Pilyugin L.; Grebel E.; Zinchenko I.; Nefedyev Y.; Mattsson L. (2017)
    © 2016 The Authors. We examine the influence of the environment on the chemical abundances of late-type galaxies with masses of 10 9.1 -10 11 M⊙ using data from the Sloan Digital Sky Survey. We find that the environmental ...
  • On the radial abundance gradients in discs of irregular galaxies 
    Pilyugin L.; Grebel E.; Zinchenko I. (2015)
    © 2015 The Authors. We determine the radial abundance distributions across the discs of 14 irregular galaxies of the types Sm and Im (morphological T types 9 and 10) as traced by their HII regions. The oxygen and nitrogen ...
  • Photometry and spectroscopy of GRB 060526: A detailed study of the afterglow and host galaxy of a z = 3.2 gamma-ray burst 
    Thöne C.; Kann D.; Jóhannesson G.; Selj J.; Jaunsen A.; Fynbo J.; Akerlof C.; Baliyan K.; Bartolini C.; Bikmaev I.; Bloom J.; Burenin R.; Cobb B.; Covino S.; Curran P.; Dahle H.; Ferrero A.; Foley S.; French J.; Fruchter A.; Ganesh S.; Graham J.; Greco G.; Guarnieri A.; Hanlon L.; Hjorth J.; Ibrahimov M.; Israel G.; Jakobsson P.; Jelínek M.; Jensen B.; Jørgensen U.; Khamitov I.; Koch T.; Levan A.; Malesani D.; Masetti N.; Meehan S.; Melady G.; Nanni D.; Näränen J.; Pakstiene E.; Pavlinsky M.; Perley D.; Piccioni A.; Pizzichini G.; Pozanenko A.; Roming P.; Rujopakarn W.; Rumyantsev V.; Rykoff E.; Sharapov D.; Starr D.; Sunyaev R.; Swan H.; Tanvir N.; Terra F.; De Ugarte Postigo A.; Vreeswijk P.; Wilson A.; Yost S.; Yuan F. (2010)
    Aims: With this paper we want to investigate the highly variable afterglow light curve and environment of gamma-ray burst (GRB) 060526 at z = 3.221. Methods: We present one of the largest photometric datasets ever obtained ...
  • The luminous host galaxy, faint supernova and rapid afterglow rebrightening of GRB 100418A 
    De Ugarte Postigo A.; Thöne C.; Bensch K.; Van Der Horst A.; Kann D.; Cano Z.; Izzo L.; Goldoni P.; Martín S.; Filgas R.; Schady P.; Gorosabel J.; Bikmaev I.; Bremer M.; Burenin R.; Castro-Tirado A.; Covino S.; Fynbo J.; Garcia-Appadoo D.; De Gregorio-Monsalvo I.; Jelínek M.; Khamitov I.; Kamble A.; Kouveliotou C.; Krühler T.; Leloudas G.; Melnikov S.; Nardini M.; Perley D.; Petitpas G.; Pooley G.; Rau A.; Rol E.; Sánchez-Ramírez R.; Starling R.; Tanvir N.; Wiersema K.; Wijers R.; Zafar T. (2018)
    © ESO 2018. Context. Long gamma-ray bursts (GRBs) give us the chance to study both their extreme physics and the star-forming galaxies in which they form. Aims. GRB 100418A, at a redshift of z = 0.6239, had a bright optical ...

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