SN 1988Z: Spectro-photometric catalogue and energy estimates

We present a spectro-photometric catalogue of the evolution of supernova 1988Z which combines new and published observations in the radio, optical and X-ray bands, with the aim of offering a comprehensive view of the evolution of this object and deriving the total energy radiated since discovery. The major contribution to the total radiated energy comes at optical to X-ray frequencies, with a total emission of at least $2 \times 10^{51}$ erg (for Ho=50 km/s) in 8.5 years. A model-dependent extrapolation of this value indicates that the total radiated energy may be as high as $10^{52}$ erg. The high value of the radiated energy supports a scenario in which most of the kinetic energy of the ejecta is thermalized and radiated in a short interaction with a dense circumstellar medium of nearly constant density. In this sense, 1988Z is not a supernova but a young and compact supernova remnant.Comment: Accepted to be published in MNRAS (14 pages, 10 figures). Also available at http://www.inaoep.mx/~itzia

ESO/CTIO workshop on bulges of galaxies. Proceedings

SIGLECopy held by FIZ Karlsruhe; available from UB/TIB Hannover / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekDEGerman

The outburst of the T Tauri star EX Lupi in 1994

We have observed an outburst of the T Tauri star EX Lup in March 1994. We present both photometric (BVR) and spectroscopic (low and medium resolution) observations carried out during the decline after outburst. The star appears much bluer during outburst due to an increased emission of a hot continuum. This is accompanied by a strong increase of the veiling of photospheric lines. We observe inverse P Cygni profiles of many emission lines over a large brightness range of EX Lup. We briefly discuss these features towards the model of magnetospherically supported accretion of disk material. (orig.)SIGLEAvailable from TIB Hannover: RR 8257(43) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekBundesministerium fuer Bildung, Wissenschaft, Forschung und Technologie, Bonn (Germany); Deutsche Forschungsgemeinschaft (DFG), Bonn (Germany)DEGerman

X-Ray outbursts from nearby 'normal' and active galaxies A review, new radio observations, and an X-ray search for further tidal disruption flares

SIGLEAvailable from TIB Hannover: RN 9303(498) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekDEGerman

Adaptive optics observations of LBQS 0108+0028: K-band detection of the host galaxy of a radio-quiet QSO at z #approx# 2

We report the first unambiguous detection of the host galaxy of a normal radio-quiet QSO at high-redshift in K-band. The luminosity of the host comprises about 35% of the total K-band luminosity. Assuming the average colour of QSOs at z#approx#2, the host would be about 5 to 6 mag brighter than an unevolved L_* galaxy placed at z#approx#2, and 3 to 4 mag brighter than a passively evolved L_* galaxy at the same redshift. The luminosity of the host galaxy of the QSO would thus overlap with the highest found in radio-loud QSOs and radio-galaxies at the same redshift. (orig.)Available from TIB Hannover: RR 4697(1093) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEDEGerman

Globular cluster calibration of the peak brightness of the type Ia Supernova 1992A and the value of H_0

We have determined the absolute magnitude at maximum light of SN 1992A by using the turn-over magnitude of the Globular Cluster Luminosity Function of its parent galaxy, NGC 1380. A recalibration of the peak of the turn-over magnitude of the Milky Way clusters using the latest HIPPARCOS results has been made with an assessment of the complete random and systematic error budget. The following results emerge: a distance to NGC 1380 of 18.6#+-#1.4 Mpc, corresponding to (m-M)=31.35#+-#0.16, and an absolute magnitude of SN 1992A at maximum of M_B(max)=-18.79#+-#0.16. Taken at face value, SN 1992A seems to be more than half a magnitude fainter than the other SNeI-a for which accurate distances exist. We discuss the implications of this result and present possible explanations. We also discuss the Phillips's (1993) relationship between rate of decline and the absolute magnitude at maximum, on the basis of 9 SNeI-a, whose individual distances have been obtained with Cepheids and the Globular Cluster Luminosity Function. The new calibration of this relationship, applied to the most distant SNe of the Calan-Tololo survey, yields H_0=62#+-#6 km s"-"1 Mpc"-"1. (orig.)Available from TIB Hannover: RR 7310(98-14) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEDEGerman

A Baade-Wesselink analysis of Cepheids in the Small Magellanic Cloud

We present preliminary results from a Baade-Wesselink analysis of five Cepheids in the Small Magellanic Cloud with periods between 13.5 and 16.8 days and spanning a range of (B-V) color from 0.5 to 0.8. Employing the surface brightness calibration of Fouque and Gieren (1997) we find a distance modulus to the SMC of 18.86#+-#0.08 mag (internal error) and that the SMC Cepheids are fainter than their galactic counterparts by approximately 0.2 mag. A full analysis of the various possible biases and systematic effects is required before firm conclusions can be reached on basis of the data presented here. This work is ongoing and the main point of this contibution is to illustrate the potential of the Baade-Wesselink method for resolving the luminosity-metallicity effect question. If the preliminary result holds up, it suggests that there is a metallicity dependence of the P-L relation of the order 0.3 mag per dex in the sense that metal rich Cepheids are brighter. (orig.)Available from TIB Hannover: RR 7310(98-13) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEDEGerman

A multi-line study of the molecular interstellar medium in M82's starburst nucleus

SIGLEAvailable from TIB Hannover: RN 9303(213) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekDEGerman

VizieR Online Data Catalog: Stellar kinematics in CALIFA survey (Falcon-Barroso+, 2017)

This study is based on observations of 300 galaxies drawn from the CALIFA mother and extended samples1, which are part of the photometric catalog of the seventh data release (Abazajian et al., 2009ApJS..182..543A) of the Sloan Digital Sky Survey (SDSS). (1 data file)