Browsing by Author "Clocchiatti, Alejandro"
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- ItemA Hubble-Space-Telescope ultraviolet-Spectrum of SN 1993J(1994) Jeffery, D.J.; Clocchiatti, Alejandro
- ItemA massive, cooling-flow-induced starburst in the core of a luminous cluster of galaxies(2012) Mcdonald, M.; Clocchiatti, Alejandro
- ItemA measurement of gravitational lensing of the cosmic microwave background by galaxy clusters using data from the South Pole Telescope(2015) Baxter, E. J.; Keisler, R.; Dodelson, S.; Aird, K. A.; Allen, S. W.; Ashby, M. L .N.; Bautz, M.; Bayliss, M.; Benson, B. A.; Clocchiatti, Alejandro; Bleem, L. E.
- ItemA puzzle solved after two decades: SN 2002gh among the brightest of superluminous supernovae(2022) Cartier, Regis; Hamuy, Mario; Contreras, Carlos; Anderson, Joseph P.; Phillips, Mark M.; Morrell, Nidia; Stritzinger, Maximilian D.; Hueichapan, Emilio D.; Clocchiatti, Alejandro; Roth, Miguel; Thomas-Osip, Joanna; Gonzalez, Luis E.We present optical photometry and spectroscopy of the superluminous SN 2002gh from maximum light to +204 d, obtained as part of the Carnegie Type II Supernova (CATS) project. SN 2002gh is among the most luminous discovered supernovae ever, yet it remained unnoticed for nearly two decades. Using Dark Energy Camera archival images we identify the potential supernova (SN) host galaxy as a faint dwarf galaxy, presumably having low metallicity, and in an apparent merging process with other nearby dwarf galaxies. We show that SN 2002gh is among the brightest hydrogen-poor SLSNe with M-V = -22.40 +/- 0.02, with an estimated peak bolometric luminosity of 2.6 +/- 0.1 x 10(44) erg s(-1). We discount the decay of radioactive nickel as the main SN power mechanism, and assuming that the SN is powered by the spin-down of a magnetar we obtain two alternative solutions. The first case, is characterized by significant magnetar power leakage, and M-ej between 0.6 and 3.2 M-circle dot, P-spin = 3.2 ms, and B = 5 x 10(13) G. The second case does not require power leakage, resulting in a huge ejecta mass of about 30 M-circle dot, a fast spin period of P-spin similar to 1 ms, and B similar to 1.6 x 10(14) G. We estimate a zero-age main-sequence mass between 14 and 25 M-circle dot for the first case and of about 135 M-circle dot for the second case. The latter case would place the SN progenitor among the most massive stars observed to explode as an SN.
- ItemA Spectropolarimetric View on the Nature of the Peculiar Type I SN 2005hk(2010) Maund, J. R.; Clocchiatti, Alejandro; Zelaya García, Paula Andrea
- ItemA study of SN 1992H in NGC 5377(1996) Clocchiatti, Alejandro
- ItemAnalysis of late-time light curves of Type IIb, Ib and Ic supernovae(2015) Wheeler, J.; Johnson, V.; Clocchiatti, Alejandro
- ItemAnalysis of Sunyaev-Zel'dovich effect mass-observable relations using South Pole Telescope observations of an X-ray selected sample of low-mass galaxy clusters and groups(2015) Liu, J.; Mohr, J.; Saro, A.; Aird, K. A.; Ashby, M.; Bautz, M.; Bayliss, M.; Benson, B.; Clocchiatti, Alejandro
- ItemBroadband polarimetry of supernovae: SN 1994D, SN 1994Y, SN 1994ae, SN 1995D and SN 1995H(1996) Wang, Lifan.; Clocchiatti, Alejandro
- ItemConstraining cosmic evolution of type Ia supernovae(2008) Foley, Ryan.; Clocchiatti, Alejandro; Pignata, Giuliano
- ItemConstraints on cosmological models from Hubble Space Telescope observations of high-z supernovae(1998) Garnavich, P. M.; Clocchiatti, Alejandro
- ItemConstraints on the CMB temperature evolution using multiband measurements of the sunyaev-zel'dovich effect with the south pole telescope(2014) Saro, A.; Liu, J.; Mohr, J.; Aird, K.; Ashby, M.; Bayliss, M.; Benson, B.; Bleem, L. E.; Bocquet, S.; Clocchiatti, Alejandro
- ItemContinuum Foreground Polarization and NaI Absorption in Type Ia SNe(2017) Zelaya, P; Clocchiatti, Alejandro; Baade, D; Hoflich, P; Maund, J; Patat, F; Quinn, Jason Lee; Reilly, E; Wang, L; Wheeler, J; Forster, F; González, S
- ItemCosmological Results From High-Z Supernovae(2003) Tonry, John.; Clocchiatti, Alejandro
- ItemCOSMOLOGICAL. CONSTRAINTS. FROM. GALAXY. CLUSTERS. IN. THE. 2500 SQUARE-DEGREE. SPT-SZ. SURVEY(2016) De Haan, T.; Benson, B.; Bleem, L.; Allen, S.; Applegate, D.; Ashby, M.; Bautz, M.; Bayliss, M.; Bocquet, S.; Clocchiatti, Alejandro; Brodwin, M.; Carlstrom, J.; Chang, C.; Chiu, I.; Cho, H.; Crawford, T.
- ItemDeath rate of massive stars at redshift ~0.3(2005) Cappellaro, E.; Clocchiatti, Alejandro
- ItemDiscovery and cosmological implications of SPT-CL J2106-5844, the most massive known cluster at Z > 1(2011) Foley, R.; Clocchiatti, Alejandro
- ItemDiscovery of four gravitationally lensed quasars from the Sloan Digital Sky Survey(2008) Oguri, M.; Clocchiatti, Alejandro
- ItemDistance determination to 12 type II supernovae using the expanding photosphere method(2009) Jones Fernández, Matías Ignacio; Clocchiatti, Alejandro
- ItemEarly observations of SN-1993J in M81 at McDonald-Observatory(1993) Wheeler, J C.; Clocchiatti, Alejandro