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12 results on '"Mahabal, A."'

1. Minutes-duration optical flares with supernova luminosities

Author

Ho, Anna Y. Q., primary, Perley, Daniel A., additional, Chen, Ping, additional, Schulze, Steve, additional, Dhillon, Vik, additional, Kumar, Harsh, additional, Suresh, Aswin, additional, Swain, Vishwajeet, additional, Bremer, Michael, additional, Smartt, Stephen J., additional, Anderson, Joseph P., additional, Anupama, G. C., additional, Awiphan, Supachai, additional, Barway, Sudhanshu, additional, Bellm, Eric C., additional, Ben-Ami, Sagi, additional, Bhalerao, Varun, additional, de Boer, Thomas, additional, Brink, Thomas G., additional, Burruss, Rick, additional, Chandra, Poonam, additional, Chen, Ting-Wan, additional, Chen, Wen-Ping, additional, Cooke, Jeff, additional, Coughlin, Michael W., additional, Das, Kaustav K., additional, Drake, Andrew J., additional, Filippenko, Alexei V., additional, Freeburn, James, additional, Fremling, Christoffer, additional, Fulton, Michael D., additional, Gal-Yam, Avishay, additional, Galbany, Lluís, additional, Gao, Hua, additional, Graham, Matthew J., additional, Gromadzki, Mariusz, additional, Gutiérrez, Claudia P., additional, Hinds, K-Ryan, additional, Inserra, Cosimo, additional, A J, Nayana, additional, Karambelkar, Viraj, additional, Kasliwal, Mansi M., additional, Kulkarni, Shri, additional, Müller-Bravo, Tomás E., additional, Magnier, Eugene A., additional, Mahabal, Ashish A., additional, Moore, Thomas, additional, Ngeow, Chow-Choong, additional, Nicholl, Matt, additional, Ofek, Eran O., additional, Omand, Conor M. B., additional, Onori, Francesca, additional, Pan, Yen-Chen, additional, Pessi, Priscila J., additional, Petitpas, Glen, additional, Polishook, David, additional, Poshyachinda, Saran, additional, Pursiainen, Miika, additional, Riddle, Reed, additional, Rodriguez, Antonio C., additional, Rusholme, Ben, additional, Segre, Enrico, additional, Sharma, Yashvi, additional, Smith, Ken W., additional, Sollerman, Jesper, additional, Srivastav, Shubham, additional, Strotjohann, Nora Linn, additional, Suhr, Mark, additional, Svinkin, Dmitry, additional, Wang, Yanan, additional, Wiseman, Philip, additional, Wold, Avery, additional, Yang, Sheng, additional, Yang, Yi, additional, Yao, Yuhan, additional, Young, David R., additional, and Zheng, WeiKang, additional

Published
2023
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2. Publisher Correction: A very luminous jet from the disruption of a star by a massive black hole

Author

Andreoni, Igor, primary, Coughlin, Michael W., additional, Perley, Daniel A., additional, Yao, Yuhan, additional, Lu, Wenbin, additional, Cenko, S. Bradley, additional, Kumar, Harsh, additional, Anand, Shreya, additional, Ho, Anna Y. Q., additional, Kasliwal, Mansi M., additional, de Ugarte Postigo, Antonio, additional, Sagués-Carracedo, Ana, additional, Schulze, Steve, additional, Kann, D. Alexander, additional, Kulkarni, S. R., additional, Sollerman, Jesper, additional, Tanvir, Nial, additional, Rest, Armin, additional, Izzo, Luca, additional, Somalwar, Jean J., additional, Kaplan, David L., additional, Ahumada, Tomás, additional, Anupama, G. C., additional, Auchettl, Katie, additional, Barway, Sudhanshu, additional, Bellm, Eric C., additional, Bhalerao, Varun, additional, Bloom, Joshua S., additional, Bremer, Michael, additional, Bulla, Mattia, additional, Burns, Eric, additional, Campana, Sergio, additional, Chandra, Poonam, additional, Charalampopoulos, Panos, additional, Cooke, Jeff, additional, D’Elia, Valerio, additional, Das, Kaustav Kashyap, additional, Dobie, Dougal, additional, Fernández, José Feliciano Agüí, additional, Freeburn, James, additional, Fremling, Cristoffer, additional, Gezari, Suvi, additional, Goode, Simon, additional, Graham, Matthew J., additional, Hammerstein, Erica, additional, Karambelkar, Viraj R., additional, Kilpatrick, Charles D., additional, Kool, Erik C., additional, Krips, Melanie, additional, Laher, Russ R., additional, Leloudas, Giorgos, additional, Levan, Andrew, additional, Lundquist, Michael J., additional, Mahabal, Ashish A., additional, Medford, Michael S., additional, Miller, M. Coleman, additional, Möller, Anais, additional, Mooley, Kunal P., additional, Nayana, A. J., additional, Nir, Guy, additional, Pang, Peter T. H., additional, Paraskeva, Emmy, additional, Perley, Richard A., additional, Petitpas, Glen, additional, Pursiainen, Miika, additional, Ravi, Vikram, additional, Ridden-Harper, Ryan, additional, Riddle, Reed, additional, Rigault, Mickael, additional, Rodriguez, Antonio C., additional, Rusholme, Ben, additional, Sharma, Yashvi, additional, Smith, I. A., additional, Stein, Robert D., additional, Thöne, Christina, additional, Tohuvavohu, Aaron, additional, Valdes, Frank, additional, van Roestel, Jan, additional, Vergani, Susanna D., additional, Wang, Qinan, additional, and Zhang, Jielai, additional

Published
2023
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3. A very luminous jet from the disruption of a star by a massive black hole

Author

Andreoni, Igor, primary, Coughlin, Michael W., additional, Perley, Daniel A., additional, Yao, Yuhan, additional, Lu, Wenbin, additional, Cenko, S. Bradley, additional, Kumar, Harsh, additional, Anand, Shreya, additional, Ho, Anna Y. Q., additional, Kasliwal, Mansi M., additional, de Ugarte Postigo, Antonio, additional, Sagués-Carracedo, Ana, additional, Schulze, Steve, additional, Kann, D. Alexander, additional, Kulkarni, S. R., additional, Sollerman, Jesper, additional, Tanvir, Nial, additional, Rest, Armin, additional, Izzo, Luca, additional, Somalwar, Jean J., additional, Kaplan, David L., additional, Ahumada, Tomás, additional, Anupama, G. C., additional, Auchettl, Katie, additional, Barway, Sudhanshu, additional, Bellm, Eric C., additional, Bhalerao, Varun, additional, Bloom, Joshua S., additional, Bremer, Michael, additional, Bulla, Mattia, additional, Burns, Eric, additional, Campana, Sergio, additional, Chandra, Poonam, additional, Charalampopoulos, Panos, additional, Cooke, Jeff, additional, D’Elia, Valerio, additional, Das, Kaustav Kashyap, additional, Dobie, Dougal, additional, Fernández, José Feliciano Agüí, additional, Freeburn, James, additional, Fremling, Cristoffer, additional, Gezari, Suvi, additional, Goode, Simon, additional, Graham, Matthew J., additional, Hammerstein, Erica, additional, Karambelkar, Viraj R., additional, Kilpatrick, Charles D., additional, Kool, Erik C., additional, Krips, Melanie, additional, Laher, Russ R., additional, Leloudas, Giorgos, additional, Levan, Andrew, additional, Lundquist, Michael J., additional, Mahabal, Ashish A., additional, Medford, Michael S., additional, Miller, M. Coleman, additional, Möller, Anais, additional, Mooley, Kunal P., additional, Nayana, A. J., additional, Nir, Guy, additional, Pang, Peter T. H., additional, Paraskeva, Emmy, additional, Perley, Richard A., additional, Petitpas, Glen, additional, Pursiainen, Miika, additional, Ravi, Vikram, additional, Ridden-Harper, Ryan, additional, Riddle, Reed, additional, Rigault, Mickael, additional, Rodriguez, Antonio C., additional, Rusholme, Ben, additional, Sharma, Yashvi, additional, Smith, I. A., additional, Stein, Robert D., additional, Thöne, Christina, additional, Tohuvavohu, Aaron, additional, Valdes, Frank, additional, van Roestel, Jan, additional, Vergani, Susanna D., additional, Wang, Qinan, additional, and Zhang, Jielai, additional

Published
2022
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4. A possible close supermassive black-hole binary in a quasar with optical periodicity

Author

Graham, Matthew J., Djorgovski, S.G., Stern, Daniel, Glikman, Eilat, Drake, Andrew J., Mahabal, Ashish A., Donalek, Ciro, Larson, Steve, and Christensen, Eric

Subjects
Black holes (Astronomy) -- Observations, Quasars -- Observations, Environmental issues, Science and technology, Zoology and wildlife conservation
Abstract

Quasars have long been known to be variable sources at all wavelengths. Their optical variability is stochastic and can be due to a variety of physical mechanisms; it is also well-described statistically in terms of a damped random walk model (1). The recent availability of large collections of astronomical time series of flux measurements (light curves (2-5)) offers new data sets for a systematic exploration of quasar variability. Here we report the detection of a strong, smooth periodic signal in the optical variability of the quasar PG 1302-102 with a mean observed period of 1,884 ± 88 days. It was identified in a search for periodic variability in a data set of light curves for 247,000 known, spectroscopically confirmed quasars with a temporal baseline of about 9 years. Although the interpretation of this phenomenon is still uncertain, the most plausible mechanisms involve a binary system of two supermassive black holes with a subparsec separation. Such systems are an expected consequence of galaxy mergers and can provide important constraints on models of galaxy formation and evolution., Subparsec supermassive black-hole (SMBH) binary systems are not resolvable except possibly with long baseline radio interferometry. An alternative approach to their detection is through a modulated variability--caused by, for example, [...]

Published
2015

5. A 62-minute orbital period black widow binary in a wide hierarchical triple

Author

Burdge, Kevin B., primary, Marsh, Thomas R., additional, Fuller, Jim, additional, Bellm, Eric C., additional, Caiazzo, Ilaria, additional, Chakrabarty, Deepto, additional, Coughlin, Michael W., additional, De, Kishalay, additional, Dhillon, V. S., additional, Graham, Matthew J., additional, Rodríguez-Gil, Pablo, additional, Jaodand, Amruta D., additional, Kaplan, David L., additional, Kara, Erin, additional, Kong, Albert K. H., additional, Kulkarni, S. R., additional, Li, Kwan-Lok, additional, Littlefair, S. P., additional, Majid, Walid A., additional, Mróz, Przemek, additional, Pearlman, Aaron B., additional, Phinney, E. S., additional, Roestel, Jan van, additional, Simcoe, Robert A., additional, Andreoni, Igor, additional, Drake, Andrew J., additional, Dekany, Richard G., additional, Duev, Dmitry A., additional, Kool, Erik C., additional, Mahabal, Ashish A., additional, Medford, Michael S., additional, Riddle, Reed, additional, and Prince, Thomas A., additional

Published
2022
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6. Publisher Correction: A highly magnetized and rapidly rotating white dwarf as small as the Moon

Author

Caiazzo, Ilaria, primary, Burdge, Kevin B., additional, Fuller, James, additional, Heyl, Jeremy, additional, Kulkarni, S. R., additional, Prince, Thomas A., additional, Richer, Harvey B., additional, Schwab, Josiah, additional, Andreoni, Igor, additional, Bellm, Eric C., additional, Drake, Andrew, additional, Duev, Dmitry A., additional, Graham, Matthew J., additional, Helou, George, additional, Mahabal, Ashish A., additional, Masci, Frank J., additional, Smith, Roger, additional, and Soumagnac, Maayane T., additional

Published
2021
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7. A highly magnetized and rapidly rotating white dwarf as small as the Moon

Author

Caiazzo, Ilaria, primary, Burdge, Kevin B., additional, Fuller, James, additional, Heyl, Jeremy, additional, Kulkarni, S. R., additional, Prince, Thomas A., additional, Richer, Harvey B., additional, Schwab, Josiah, additional, Andreoni, Igor, additional, Bellm, Eric C., additional, Drake, Andrew, additional, Duev, Dmitry A., additional, Graham, Matthew J., additional, Helou, George, additional, Mahabal, Ashish A., additional, Masci, Frank J., additional, Smith, Roger, additional, and Soumagnac, Maayane T., additional

Published
2021
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8. A highly magnetized and rapidly rotating white dwarf as small as the Moon

Author

Ilaria, Caiazzo, Kevin B, Burdge, James, Fuller, Jeremy, Heyl, S R, Kulkarni, Thomas A, Prince, Harvey B, Richer, Josiah, Schwab, Igor, Andreoni, Eric C, Bellm, Andrew, Drake, Dmitry A, Duev, Matthew J, Graham, George, Helou, Ashish A, Mahabal, Frank J, Masci, Roger, Smith, and Maayane T, Soumagnac

Abstract

White dwarfs represent the last stage of evolution of stars with mass less than about eight times that of the Sun and, like other stars, are often found in binaries

Published
2020

9. Publisher Correction: A highly magnetized and rapidly rotating white dwarf as small as the Moon

Author

Kevin B. Burdge, Ashish Mahabal, Harvey B. Richer, Roger Smith, S. R. Kulkarni, Jim Fuller, Maayane T. Soumagnac, George Helou, Josiah Schwab, Eric C. Bellm, Frank J. Masci, Dmitry A. Duev, Thomas A. Prince, Andrew J. Drake, Ilaria Caiazzo, Matthew J. Graham, Igor Andreoni, and Jeremy S. Heyl

Subjects
Physics, Multidisciplinary, Published Erratum, White dwarf, Astronomy, Stellar evolution
Published
2021

10. General relativistic orbital decay in a seven-minute-orbital-period eclipsing binary system

Author

Ashish Mahabal, Kevin B. Burdge, Matthew J. Graham, Russ R. Laher, Dmitry A. Duev, Thomas A. Prince, Thomas Kupfer, Matteo Giomi, Stephen Kaye, Richard Dekany, Frank J. Masci, Maayane T. Soumagnac, George Helou, Reed Riddle, David L. Kaplan, Roger M. H. Smith, Michael Feeney, Richard Walters, Paula Szkody, Michael W. Coughlin, Lars Bildsten, David L. Shupe, Shrinivas R. Kulkarni, Jim Fuller, Jan van Roestel, and Eric C. Bellm

Subjects
High Energy Astrophysical Phenomena (astro-ph.HE), Physics, Multidisciplinary, 010308 nuclear & particles physics, Gravitational wave, General relativity, Astrophysics::Instrumentation and Methods for Astrophysics, FOS: Physical sciences, White dwarf, Astrophysics, Orbital decay, Orbital period, 01 natural sciences, Orbit, Astrophysics - Solar and Stellar Astrophysics, Planet, 0103 physical sciences, Astrophysics::Solar and Stellar Astrophysics, Astrophysics::Earth and Planetary Astrophysics, Astrophysics - High Energy Astrophysical Phenomena, 010303 astronomy & astrophysics, Solar and Stellar Astrophysics (astro-ph.SR), Eclipse
Abstract

General relativity predicts that short orbital period binaries emit significant gravitational radiation, and the upcoming Laser Interferometer Space Antenna (LISA) is expected to detect tens of thousands of such systems; however, few have been identified, and only one is eclipsing--the double white dwarf binary SDSS J065133.338+284423.37, which has an orbital period of 12.75 minutes. Here, we report the discovery of an eclipsing double white dwarf binary system with an orbital period of only 6.91 minutes, ZTF J153932.16+502738.8. This system has an orbital period close to half that of SDSS J065133.338+284423.37 and an orbit so compact that the entire binary could fit within the diameter of the planet Saturn. The system exhibits a deep eclipse, and a double-lined spectroscopic nature. We observe rapid orbital decay, consistent with that expected from general relativity. ZTF J153932.16+502738.8 is a significant source of gravitational radiation close to the peak of LISA's sensitivity, and should be detected within the first week of LISA observations., 44 pages, 10 figures, 2 tables. Published online by Nature on July 24, 2019

Published
2019

11. General relativistic orbital decay in a seven-minute-orbital-period eclipsing binary system

Author

Burdge, Kevin B., primary, Coughlin, Michael W., additional, Fuller, Jim, additional, Kupfer, Thomas, additional, Bellm, Eric C., additional, Bildsten, Lars, additional, Graham, Matthew J., additional, Kaplan, David L., additional, Roestel, Jan van, additional, Dekany, Richard G., additional, Duev, Dmitry A., additional, Feeney, Michael, additional, Giomi, Matteo, additional, Helou, George, additional, Kaye, Stephen, additional, Laher, Russ R., additional, Mahabal, Ashish A., additional, Masci, Frank J., additional, Riddle, Reed, additional, Shupe, David L., additional, Soumagnac, Maayane T., additional, Smith, Roger M., additional, Szkody, Paula, additional, Walters, Richard, additional, Kulkarni, S. R., additional, and Prince, Thomas A., additional

Published
2019
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12. A possible close supermassive black-hole binary in a quasar with optical periodicity

Author

Ashish Mahabal, Matthew J. Graham, Daniel Stern, Eric Christensen, Eilat Glikman, Andrew J. Drake, S. M. Larson, Ciro Donalek, and S. G. Djorgovski

Subjects
High Energy Astrophysical Phenomena (astro-ph.HE), Physics, Supermassive black hole, Multidisciplinary, 010308 nuclear & particles physics, FOS: Physical sciences, Binary number, Quasar, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, Galaxy merger, Light curve, Random walk, Astrophysics - Astrophysics of Galaxies, 01 natural sciences, Periodic function, Astrophysics of Galaxies (astro-ph.GA), 0103 physical sciences, Galaxy formation and evolution, Astrophysics - High Energy Astrophysical Phenomena, 010303 astronomy & astrophysics, Astrophysics::Galaxy Astrophysics
Abstract

Quasars have long been known to be variable sources at all wavelengths. Their optical variability is stochastic, can be due to a variety of physical mechanisms, and is well-described statistically in terms of a damped random walk model. The recent availability of large collections of astronomical time series of flux measurements (light curves) offers new data sets for a systematic exploration of quasar variability. Here we report on the detection of a strong, smooth periodic signal in the optical variability of the quasar PG 1302-102 with a mean observed period of 1,884 $\pm$ 88 days. It was identified in a search for periodic variability in a data set of light curves for 247,000 known, spectroscopically confirmed quasars with a temporal baseline of $\sim9$ years. While the interpretation of this phenomenon is still uncertain, the most plausible mechanisms involve a binary system of two supermassive black holes with a subparsec separation. Such systems are an expected consequence of galaxy mergers and can provide important constraints on models of galaxy formation and evolution., 19 pages, 6 figures. Published online by Nature on 7 January 2015

Published
2015

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