39 citations · 39 across the 1 of their papers we have counts for
5 papers
Detection of optical linear polarization in the SN2006aj/XRF060218 non-spherical expansion
J. Gorosabel, V. Larionov, A. J. Castro-Tirado +10
We have performed optical polarimetric observations of the SN2006aj associated to the X-ray flash (XRF) of February 18, 2006, XRF060218 that provide information on its expansion ge…
Comparison of the Halpha equivalent width of HII regions in a flocculent and a grand design galaxy: possible evidences for IMF variations
Bernabe Cedres, Jordi Cepa, Akihiko Tomita
We present here a study of the Halpha equivalent widths of the flocculent galaxy NGC 4395 and the grand design galaxy NGC 5457. A difference between the mean values of the Halpha e…
Effects of photon escape on diagnostic diagrams for HII regions
C. Giammanco, J. E. Beckman, B. Cedres
In this article we first outline the mounting evidence that a significant fraction of the ionizing photons emitted by OB stars within HII regions escape from their immediate surrou…
IRAS 04000+5052: A not so compact, not so metal-poor HII region
Cesar Esteban, Luis Lopez-Martin, Angel R. Lopez-Sanchez +2
We present new observations of IRAS 04000+5052, a Galactic HII region associated with a young stellar cluster and possibly located at the Perseus arm. Contrary to previous claims,…
The oxygen abundance gradient in M101: the reliability of the P method
B. Cedres, M. A. Urbaneja, J. Cepa
We present the oxygen abundance determination for 90 HII regions in the inner parts of the grand design galaxy M101. The abundances were derived employing the P method (Pilyugin 20…