Zobrazeno 21 - 30
of 276
pro vyhledávání: '"Poznanski, Dovi"'
What intrinsic properties shape the light curves of Type II supernovae (SNe)? To address this question we derive observational measures that are robust (i.e., insensitive to detailed radiative transfer) and constrain the contribution from $^{56}$Ni,
Externí odkaz:
http://arxiv.org/abs/1506.07185
Autor:
Baron, Dalya, Poznanski, Dovi, Watson, Darach, Yao, Yushu, Cox, Nick L. J., Prochaska, J. Xavier
Using over a million and a half extragalactic spectra we study the correlations of the Diffuse Interstellar Bands (DIBs) in the Milky Way. We measure the correlation between DIB strength and dust extinction for 142 DIBs using 24 stacked spectra in th
Externí odkaz:
http://arxiv.org/abs/1501.04631
We study a sample of 11 Type II supernovae (SNe) discovered by the OGLE-IV survey. All objects have well sampled I-band light curves, and at least one spectrum. We find that 2 or 3 of the 11 SNe have a declining light curve, and spectra consistent wi
Externí odkaz:
http://arxiv.org/abs/1501.03452
Autor:
Ganot, Noam, Gal-Yam, Avishay, Ofek, Eran O., Sagiv, Ilan, Waxman, Eli, Lapid, Ofer, Kulkarni, Shrinivas R., Ben-Ami, Sagi, Kasliwal, Mansi M., Chelouche, Doron, Rafter, Stephen, Behar, Ehud, Laor, Ari, Poznanski, Dovi, Nakar, Udi, Maoz, Dan, Trakhtenbrot, Benny, Neill, James D., Barlow, Thomas A., Martin, Christofer D., Gezari, Suvi, Arcavi, Iair, Bloom, Joshua s., Nugent, Peter E., Sullivan, Mark
Publikováno v:
2016 ApJ, 820, 57
The radius and surface composition of an exploding massive star,as well as the explosion energy per unit mass, can be measured using early UV observations of core collapse supernovae (SNe). We present the first results from a simultaneous GALEX/PTF s
Externí odkaz:
http://arxiv.org/abs/1412.4063
Autor:
Maguire, Kate, Sullivan, Mark, Pan, Yen-Chen, Gal-Yam, Avishay, Hook, Isobel M., Howell, D. Andrew, Nugent, Peter E., Mazzali, Paolo, Chotard, Nicolas, Clubb, Kelsey I., Filippenko, Alexei V., Kasliwal, Mansi M., Kandrashoff, Michael T., Poznanski, Dovi, Saunders, Clare M., Silverman, Jeffrey M., Walker, Emma, Xu, Dong
We present an investigation of the optical spectra of 264 low-redshift (z < 0.2) Type Ia supernovae (SNe Ia) discovered by the Palomar Transient Factory, an untargeted transient survey. We focus on velocity and pseudo-equivalent width measurements of
Externí odkaz:
http://arxiv.org/abs/1408.1430
Using over a million and a half extragalactic spectra we study the properties of the mysterious Diffuse Interstellar Bands (DIBs) in the Milky Way. These data provide us with an unprecedented sampling of the skies at high Galactic-latitude and low du
Externí odkaz:
http://arxiv.org/abs/1406.7006
Autor:
Faran, Tamar, Poznanski, Dovi, Filippenko, Alexei V., Chornock, Ryan, Foley, Ryan J., Ganeshalingam, Mohan, Leonard, Douglas C., Li, Weidong, Modjaz, Maryam, Nakar, Ehud, Serduke, Frank J. D., Silverman, Jeffrey M.
Publikováno v:
MNRAS 442 844F (2014)
We study a sample of 23 Type II Plateau supernovae (SNe II-P), all observed with the same set of instruments. Analysis of their photometric evolution confirms that their typical plateau duration is 100 days with little scatter, showing a tendency to
Externí odkaz:
http://arxiv.org/abs/1404.0378
Autor:
Ben-Ami, Sagi, Gal-Yam, Avishay, Mazzali, Paolo A., Modjaz, Maryam, Rabinak, Itay, Sullivan, Mark, Bildsten, Lars, Poznanski, Dovi, Yaron, Ofer, Arcavi, Iair, Bloom, Joshua S., Horesh, Assaf, Kasliwal, Mansi M., Kulkarni, Shrinivas R., Nugent, Peter E., Ofek, Eran O., Perley, Daniel, Quimby, Robert, Xu, Dong
We present our observations of SN 2010mb, a Type Ic SN lacking spectroscopic signatures of H and He. SN 2010mb has a slowly-declining light curve ($\sim600\,$days) that cannot be powered by $^{56}$Ni/$^{56}$Co radioactivity, the common energy source
Externí odkaz:
http://arxiv.org/abs/1309.6496
Autor:
Poznanski, Dovi
Three lines of evidence indicate that in the most common type of core collapse supernovae, the energy deposited in the ejecta by the exploding core is approximately proportional to the progenitor mass cubed. This results stems from an observed unifor
Externí odkaz:
http://arxiv.org/abs/1304.4967
Autor:
Cenko, S. Bradley, Kulkarni, S. R., Horesh, Assaf, Corsi, Alessandra, Fox, Derek B., Carpenter, John, Frail, Dale A., Nugent, Peter E., Perley, Daniel A., Gruber, D., Gal-Yam, Avishay, Groot, Paul J., Hallinan, G., Ofek, Eran O., Rau, Arne, MacLeod, Chelsea L., Miller, Adam A., Bloom, Joshua S., Filippenko, Alexei V., Kasliwal, Mansi M., Law, Nicholas M., Morgan, Adam N., Polishook, David, Poznanski, Dovi, Quimby, Robert M., Sesar, Branimir, Shen, Ken J., Silverman, Jeffrey M., Sternberg, Assaf
We report the discovery by the Palomar Transient Factory (PTF) of the transient source PTF11agg, which is distinguished by three primary characteristics: (1) bright, rapidly fading optical transient emission; (2) a faint, blue quiescent optical count
Externí odkaz:
http://arxiv.org/abs/1304.4236