Monthly Archives: April 2012

XMM-Newton observations of GX 13+1: correlation between photoionised absorption and broad line emission

M. Díaz Trigo (1), L. Sidoli (2), L. Boirin (3), and A. N. Parmar (4) ((1) ESO, Karl-Schwarzschild-Strasse 2, D-85748 Garching bei München, Germany (2) INAF-IASF, via Bassini 15, I-20133 Milano, Italy (3) Observatoire Astronomique de Strasbourg, 11 rue de … Continue reading

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A study of the role of Lyman β fluorescence on OI line strengths in Be stars

Blesson Mathew (1), D. P. K. Banerjee (1), A. Subramaniam (2) and N. M. Ashok (1) ((1)Astronomy and Astrophysics Division, Physical Research Laboratory, Navrangapura, Ahmedabad – 380 009, Gujarat, India; (2) Indian Institute of Astrophysics, Bangalore – 560 034, India) … Continue reading

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Oxygen in the Universe

G.  Stasinska,  N.  Prantzos,  G.  Meynet,  S.  Simón-Díaz,  C. Chiappini, M.  Dessauges-Zavadsky,  C.  Charbonnel,  H.-G.  Ludwig,  C.  Mendoza, N.  Grevesse,  M.  Arnould,  B.  Barbuy,  Y.  Lebreton, A.  Decourchelle, V.  Hill,  P.  Ferrando,  G.  Hébrard,  F.  Durret, M.  Katsuma  and  C.J.  Zeippen … Continue reading

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The Carina Project. V. The impact of NLTE effects on the iron content

M. Fabrizio (1), T. Merle (2), F. Thévenin (2), M. Nonino (4), G. Bono (1,4), P. B. Stetson (5,6), I. Ferraro (4), G. Iannicola (4), M. Monelli (7,8), A. R. Walker (9), R. Buonanno (1,10), F. Caputo (4), C. E. … Continue reading

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Abundances of PNe in the Outer Disk of M31

Karen B. Kwitter (1), Emma M. M. Lehman (2), Bruce Balick (3) & R.B.C. Henry (4) ((1)Department of Astronomy, Williams College, Williamstown, MA 01267, USA; (2) Department of Astronomy, Williams College, Williamstown, MA 01267, USA; (3) Department of Astronomy, University of … Continue reading

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A classification of HII regions based on Oxygen and Helium lines: The cases of TOL2146-391 and TOL0357-3915

Antonio Peimbert, María A. Peña-Guerrero & Manuel Peimbert (Instituto de Astronomía, Universidad Nacional Autónoma de México, Apdo. Postal 70-264, México, C.P. 04510, D.F., Mexico) We present long slit spectrophotometry of two HII regions: TOL2146-391 and TOL0357-3915. We performed a detailed … Continue reading

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RECALIBRATION OF PAGEL’S METHOD FOR H II REGIONS CONSIDERING THE THERMAL STRUCTURE, THE IONIZATION STRUCTURE, AND THE DEPLETION OF O INTO DUST GRAINS

María A. Peña-Guerrero, Antonio Peimbert & Manuel Peimbert (Instituto de Astronomía, Universidad Nacional Autónoma de México, Apdo. Postal 70-264, México 04510 D.F., Mexico) Using a sample of 28 HII regions from the literature with measured temperature inhomogeneity parameter, t^2, we … Continue reading

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