Zobrazeno 1 - 10
of 25
pro vyhledávání: '"Erica Hammerstein"'
Autor:
Kaustav K. Das, Christoffer Fremling, Mansi M. Kasliwal, Steve Schulze, Jesper Sollerman, Viraj Karambelkar, Sam Rose, Shreya Anand, Igor Andreoni, Marie Aubert, Sean J. Brennan, S. Bradley Cenko, Michael W. Coughlin, B. O’Connor, Kishalay De, Jim Fuller, Matthew Graham, Erica Hammerstein, Annastasia Haynie, K-Ryan Hinds, Io Kleiser, S. R. Kulkarni, Zeren Lin, Chang Liu, Ashish A. Mahabal, Christopher Martin, Adam A. Miller, James D. Neill, Daniel A. Perley, Priscila J. Pessi, Nikolaus Z. Prusinski, Josiah Purdum, Vikram Ravi, Ben Rusholme, Samantha Wu, Avery Wold, Lin Yan
Publikováno v:
The Astrophysical Journal Letters, Vol 969, Iss 1, p L11 (2024)
We present SN 2023zaw—a subluminous ( M _r = −16.7 mag) and rapidly evolving supernova ( t _1/2, _r = 4.9 days), with the lowest nickel mass (≈0.002 M _⊙ ) measured among all stripped-envelope supernovae discovered to date. The photospheric s
Externí odkaz:
https://doaj.org/article/a43cea876ff34b81badd2315d9e065ff
Autor:
Robert Stein, Ashish Mahabal, Simeon Reusch, Matthew Graham, Mansi M. Kasliwal, Marek Kowalski, Suvi Gezari, Erica Hammerstein, Szymon J. Nakoneczny, Matt Nicholl, Jesper Sollerman, Sjoert van Velzen, Yuhan Yao, Russ R. Laher, Ben Rusholme
Publikováno v:
The Astrophysical Journal Letters, Vol 965, Iss 2, p L14 (2024)
Optical surveys have become increasingly adept at identifying candidate tidal disruption events (TDEs) in large numbers, but classifying these generally requires extensive spectroscopic resources. Here we present tdescore , a simple binary photometri
Externí odkaz:
https://doaj.org/article/efb596792c5740438ef25f4cae116cd1
Autor:
Gokul P. Srinivasaragavan, Vishwajeet Swain, Brendan O’Connor, Shreya Anand, Tomás Ahumada, Daniel Perley, Robert Stein, Jesper Sollerman, Christoffer Fremling, S. Bradley Cenko, S. Antier, Nidhal Guessoum, Thomas Hussenot-Desenonges, Patrice Hello, Stephen Lesage, Erica Hammerstein, M. Coleman Miller, Igor Andreoni, Varun Bhalerao, Joshua S. Bloom, Anirban Dutta, Avishay Gal-Yam, K-Ryan Hinds, Amruta Jaodand, Mansi Kasliwal, Harsh Kumar, Alexander S. Kutyrev, Fabio Ragosta, Vikram Ravi, Kritti Sharma, Rishabh Singh Teja, Sheng Yang, G. C. Anupama, Eric C. Bellm, Michael W. Coughlin, Ashish A. Mahabal, Frank J. Masci, Utkarsh Pathak, Josiah Purdum, Oliver J. Roberts, Roger Smith, Avery Wold
Publikováno v:
The Astrophysical Journal Letters, Vol 960, Iss 2, p L18 (2024)
We report observations of the optical counterpart of the long gamma-ray burst (GRB) GRB 230812B and its associated supernova (SN) SN 2023pel. The proximity ( z = 0.36) and high energy ( E _γ _,iso ∼ 10 ^53 erg) make it an important event to study
Externí odkaz:
https://doaj.org/article/527707e0b82e453687c61f6261c7de4e
Autor:
Yuhan Yao, Muryel Guolo, Francesco Tombesi, Ruancun Li, Suvi Gezari, Javier A. García, Lixin Dai, Ryan Chornock, Wenbin Lu, S. R. Kulkarni, Keith C. Gendreau, Dheeraj R. Pasham, S. Bradley Cenko, Erin Kara, Raffaella Margutti, Yukta Ajay, Thomas Wevers, Tom M. Kwan, Igor Andreoni, Joshua S. Bloom, Andrew J. Drake, Matthew J. Graham, Erica Hammerstein, Russ R. Laher, Natalie LeBaron, Ashish A. Mahabal, Brendan O’Connor, Josiah Purdum, Vikram Ravi, Huei Sears, Yashvi Sharma, Roger Smith, Jesper Sollerman, Jean J. Somalwar, Avery Wold
Publikováno v:
The Astrophysical Journal, Vol 976, Iss 1, p 34 (2024)
We present the tidal disruption event (TDE) AT2022lri, hosted in a nearby (≈144 Mpc) quiescent galaxy with a low-mass massive black hole (10 ^4 M _⊙ < M _BH < 10 ^6 M _⊙ ). AT2022lri belongs to the TDE-H+He subtype. More than 1 Ms of X-ray data
Externí odkaz:
https://doaj.org/article/bd742daf9544494ca0743fcb223f9075
Autor:
Muryel Guolo, Suvi Gezari, Yuhan Yao, Sjoert van Velzen, Erica Hammerstein, S. Bradley Cenko, Yarone M. Tokayer
Publikováno v:
The Astrophysical Journal, Vol 966, Iss 2, p 160 (2024)
We present a systematic analysis of the X-ray emission of a sample of 17 optically selected, X-ray-detected tidal disruption events (TDEs) discovered between 2014 and 2021. The X-ray light curves show a diverse range of temporal behaviors, with most
Externí odkaz:
https://doaj.org/article/aba7f2fc66824c70849e6794812d806f
Autor:
Charlotte Ward, Suvi Gezari, Peter Nugent, Matthew Kerr, Michael Eracleous, Sara Frederick, Erica Hammerstein, Matthew J. Graham, Sjoert van Velzen, Mansi M. Kasliwal, Russ R. Laher, Frank J. Masci, Josiah Purdum, Benjamin Racine, Roger Smith
Publikováno v:
The Astrophysical Journal, Vol 961, Iss 2, p 172 (2024)
About 3%–10% of Type I active galactic nuclei (AGNs) have double-peaked broad Balmer lines in their optical spectra originating from the motion of gas in their accretion disk. Double-peaked profiles arise not only in AGNs, but occasionally appear d
Externí odkaz:
https://doaj.org/article/52edba41dce74836a1531148e1229788
Autor:
Sierra A. Dodd, Arya Nukala, Isabelle Connor, Katie Auchettl, K. D. French, Jamie A. P. Law-Smith, Erica Hammerstein, Enrico Ramirez-Ruiz
Publikováno v:
The Astrophysical Journal Letters, Vol 959, Iss 2, p L19 (2023)
We study the properties of galaxies hosting mid-infrared outbursts in the context of a catalog of 500,000 galaxies from the Sloan Digital Sky Survey. We find that nuclear obscuration, as inferred by the surrounding dust mass, does not correlate with
Externí odkaz:
https://doaj.org/article/9824461549bc434cbc10fc6e40e9e364
Autor:
Yuhan Yao, Vikram Ravi, Suvi Gezari, Sjoert van Velzen, Wenbin Lu, Steve Schulze, Jean J. Somalwar, S. R. Kulkarni, Erica Hammerstein, Matt Nicholl, Matthew J. Graham, Daniel A. Perley, S. Bradley Cenko, Robert Stein, Angelo Ricarte, Urmila Chadayammuri, Eliot Quataert, Eric C. Bellm, Joshua S. Bloom, Richard Dekany, Andrew J. Drake, Steven L. Groom, Ashish A. Mahabal, Thomas A. Prince, Reed Riddle, Ben Rusholme, Yashvi Sharma, Jesper Sollerman, Lin Yan
Publikováno v:
The Astrophysical Journal Letters, Vol 955, Iss 1, p L6 (2023)
We conduct a systematic tidal disruption event (TDE) demographics analysis using the largest sample of optically selected TDEs. A flux-limited, spectroscopically complete sample of 33 TDEs is constructed using the Zwicky Transient Facility over 3 yr
Externí odkaz:
https://doaj.org/article/edf211daf8984e0991adc8dd16ff8361
Autor:
Gokul P. Srinivasaragavan, Brendan O’Connor, S. Bradley Cenko, Alexander J. Dittmann, Sheng Yang, Jesper Sollerman, G. C. Anupama, Sudhanshu Barway, Varun Bhalerao, Harsh Kumar, Vishwajeet Swain, Erica Hammerstein, Isiah Holt, Shreya Anand, Igor Andreoni, Michael W. Coughlin, Simone Dichiara, Avishay Gal-Yam, M. Coleman Miller, Jaime Soon, Roberto Soria, Joseph Durbak, James H. Gillanders, Sibasish Laha, Anna M. Moore, Fabio Ragosta, Eleonora Troja
Publikováno v:
The Astrophysical Journal Letters, Vol 949, Iss 2, p L39 (2023)
We report observations of the optical counterpart of the long gamma-ray burst GRB 221009A. Due to the extreme rarity of being both nearby ( z = 0.151) and highly energetic ( E _γ _,iso ≥ 10 ^54 erg), GRB 221009A offers a unique opportunity to prob
Externí odkaz:
https://doaj.org/article/63770d202d7543a686955aa76aa186d1
Autor:
Erica Hammerstein, S. Bradley Cenko, Suvi Gezari, Sylvain Veilleux, Brendan O’Connor, Sjoert van Velzen, Charlotte Ward, Yuhan Yao, Matthew Graham
Publikováno v:
The Astrophysical Journal, Vol 957, Iss 2, p 86 (2023)
The host galaxies of tidal disruption events (TDEs) have been shown to possess peculiar properties, including high central light concentrations, unusual star formation histories, and “green” colors. The ubiquity of these large-scale galaxy charac
Externí odkaz:
https://doaj.org/article/18deabf66f104d0f8b9dac4ff1597829