Prompt Ia Supernovae Are Significantly Delayed (2009)
Raskin, Cody, Scannapieco, Evan, Rhoads, James, Della Valle, Massimo
The time delay between the formation of a population of stars and the onset of type Ia supernovae (SNe Ia) sets important limits on the masses and nature of SN Ia progenitors. Here we use a new...
Tanaka, Masaomi, Yamanaka, Masayuki, Maeda, Keiichi, Kawabata, Koji S., Hattori, Takashi, Minezaki, Takeo, ...
We present optical spectroscopic and photometric observations of supernova (SN) 2008D, associated with the luminous X-ray transient 080109, at >300 days after the explosion (nebular phases). We also...
Type II Supernovae as Probes of Cosmology (2009)
Poznanski, Dovi, Baron, Eddie, Blondin, Stephane, Bloom, Joshua S., D'Andrea, Christopher B., Della Valle, Massimo, ...
- Constraining the cosmological parameters and understanding Dark Energy have tremendous implications for the nature of the Universe and its physical laws. - The pervasive limit of systematic...
Tanaka, Masaomi, Yamanaka, Masayuki, Maeda, Keiichi, Kawabata, Koji S., Hattori, Takashi, Minezaki, Takeo, ...
Using Spatial Distributions to Constrain Progenitors of Supernovae and Gamma Ray Bursts (2008)
Raskin, Cody, Scannapieco, Evan, Rhoads, James, Della Valle, Massimo
We carry out a comprehensive theoretical examination of the relationship between the spatial distribution of optical transients and the properties of their progenitor stars. By constructing analytic...
Mazzali, Paolo A., Valenti, Stefano, Della Valle, Massimo, Chincarini, Guido, Sauer, Daniel N., Benetti, Stefano, ...
The only supernovae (SNe) to have shown early gamma-ray or X-ray emission thus far are overenergetic, broad-lined Type Ic SNe (Hypernovae - HNe). Recently, SN 2008D shows several novel features: (i)...
Williams, Robert, Mason, Elena, Della Valle, Massimo, Ederoclite, Alessandro
A high-resolution spectroscopic survey of postoutburst novae reveals short-lived heavy element absorption systems in a majority of novae near maximum light, having expansion velocities of 400-1000...
Mazzali, Paolo A., Valenti, Stefano, Della Valle, Massimo, Chincarini, Guido, Sauer, Daniel N., Benetti, Stefano, ...
Hypernova Signatures in the Late Rebrightening of GRB 050525A (2007)
Della Valle, Massimo, Malesani, Daniele, Bloom, Joshua S., Benetti, Stefano, Chincarini, Guido, D'Avanzo, Paolo, ...
We report observations of GRB 050525A, for which a Gemini North spectrum shows its redshift to be z = 0.606. This is the third closest long GRB discovered by Swift. We observed its afterglow using...
Models for the Type Ic Hypernova SN 2003lw associated with GRB 031203 (2007)
Mazzali, Paolo A., Deng, Jinsong, Pian, Elena, Malesani, Daniele, Tominaga, Nozomu, Maeda, Keiichi, ...
The Gamma-Ray Burst 031203 at a redshift z=0.1055 revealed a highly reddened Type Ic Supernova, SN 2003lw, in its afterglow light. This is the third well established case of a link between a...
Gamma-ray bursts associated with supernovae: a systematic analysis of BATSE GRB candidates (2007)
Bosnjak, Zeljka Marija, Celotti, Annalisa, Ghirlanda, Giancarlo, Della Valle, Massimo, Pian, Elena
We examined the properties of a sample of BATSE Gamma--Ray Bursts (GRBs) comprising events which have indications of association with a supernova (SN), some on the basis of indications of...
An enigmatic long-lasting gamma-ray burst not accompanied by a bright supernova (2007)
Della Valle, Massimo, Chincarini, Guido, Panagia, N., Tagliaferri, Gianpiero, Malesani, Daniele, Testa, Vincenzo, ...
Gamma-ray bursts (GRBs) are short, intense flashes of soft gamma-rays coming from the distant Universe. Long-duration GRBs (those lasting more than ~2 s) are believed to originate from the deaths of...
The association of GRB 060218 with a supernova and the evolution of the shock wave (2007)
Campana, Sergio, Mangano, Vanessa, Blustin, A.J., Brown, P., Burrows, David N., Chincarini, Guido, ...
Although the link between long Gamma Ray Bursts (GRBs) and supernovae (SNe) has been established, hitherto there have been no observations of the beginning of a supernova explosion and its intimate...
On the consistency of the peculiar GRBs 060218 and 060614 with the Ep,i - Eiso correlation (2007)
Amati, Lorenzo, Della Valle, Massimo, Frontera, Filippo, Malesani, Daniele, Guidorzi, Cristiano, Montanari, Enrico, ...
We analyze and discuss the position of GRB 060218 and GRB 060614 in the Ep,i - Eiso plane. GRB 060218 is important because of its similarity with GRB 980425, the proto-type event of the GRB-SN...
Type Ia Supernova Rates Near and Far (2007)
Panagia, Nino, Della Valle, Massimo, Mannucci, Filippo
(ABRIDGED) Recently, three important observational results were established: (a) The evolution of the SNIa rate with redshift show that the rate rises up to z~0.8, when the Universe was 6.5 Gyr old,...
On the Rates of Gamma Ray Bursts and Type Ib/c Supernovae (2006)
Guetta, Dafne, Della Valle, Massimo
We measure the local rates of ``low-luminosity'' (LL-GRBs, i.e. L
Supernova and GRB connection: Observations and Questions (2006)
We review the observational status of the supernova/gamma-ray burst connection. Present data suggest that SNe associated with GRBs form a heterogeneous class of objects including both bright and...
Models for the Type Ic Hypernova SN 2003lw associated with GRB 031203 (2006)
Mazzali, Paolo A., Deng, Jinsong, Pian, Elena, Malesani, Daniele, Tominaga, Nozomu, Maeda, Keiichi, ...
The Gamma-Ray Burst 031203 at a redshift z=0.1055 revealed a highly reddened Type Ic Supernova, SN 2003lw, in its afterglow light. This is the third well established case of a link between a...
Models for the type Ic hypernova SN 2003lw associated with GRB 031203 (2006)
Mazzali, Paolo A., Deng, Jingsong, Pian, Elena, Malesani, Daniele, Tominaga, Nozomu, Maeda, Keiichi, ...
Chandra observations of the recurrent nova IM Nor (2004)
Orio, Marina, Tepedelenlioglu, Emre, Starrfield, Sumner, Woodward, Charles E., Della Valle, Massimo
The recurrent nova IM Nor was observed twice in X-rays with Chandra ACIS-S, 1 and 6 months after the optical outburst. It was not detected in the first observation, with an upper limit on the X-ray...
Modelling the nova rate in galaxies (2003)
Matteucci, Francesca, Renda, Agostino, Pipino, Antonio, Della Valle, Massimo
We compute theoretical nova rates as well as type Ia SN rates in galaxies of different morphological type (Milky Way, ellipticals and irregulars) by means of detailed chemical evolution models, and...
The rate and the origin of type Ia supernovae in radiogalaxies (2003)
Della Valle, Massimo, Panagia, Nino
An analysis of type Ia supernova (SNIa) events in early type galaxies from Evans et al (1989) database provides strong evidence that the rate of type Ia supernovae (SNe) in radio-loud galaxies is...
In this article we review the current status of the stellar population assignment for novae. Observations in the Milky Way and in external galaxies point out the existence of two nova populations:...
Rebirth of Novae as Distance Indicators Due to Efficient Large Telescopes (2002)
Della Valle, Massimo, Gilmozzi, Roberto
Nova outbursts are the result of strong thermonuclear runaways on the surface of a white dwarf accreting Hydrogen-rich material from a small mass companion. These giant explosions cause the star to...
Della Valle, Massimo, Kissler-Patig, Markus, Danziger, John, Storm, Jesper
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...
A possible orbital period for the dwarf nova V1101 Aql (1997)
Masetti, Nicola, Della Valle, Massimo
We have performed a Discrete Fourier Transform on 136 CCD B, V and R frames of the Z Cam-type dwarf nova V1101 Aql. Our analysis indicates as possible orbital period P_orb =3.46 hours, though we...
Halo and Bulge/Disk globular clusters in the S0 galaxy NGC 1380 (1997)
Kissler-Patig, Markus, Richtler, Tom, Storm, Jesper, Della Valle, Massimo
We investigated the globular cluster system of the S0 galaxy NGC 1380 in the Fornax cluster with deep BVR photometry. We identified two, presumably old, populations of globular clusters. The blue...