Zobrazeno 1 - 10
of 282
pro vyhledávání: '"Popović Luka Č."'
Autor:
Lewin, Collin, Kara, Erin, Barth, Aaron J., Cackett, Edward M., De Rosa, Gisella, Homayouni, Yasaman, Horne, Keith, Kriss, Gerard A., Landt, Hermine, Gelbord, Jonathan, Montano, John, Arav, Nahum, Bentz, Misty C., Boizelle, Benjamin D., Bontà, Elena Dalla, Brotherton, Michael S., Dehghanian, Maryam, Ferland, Gary J., Fian, Carina, Goad, Michael R., Santisteban, Juan V. Hernández, Ilić, Dragana, Kaastra, Jelle, Kaspi, Shai, Korista, Kirk T., Kosec, Peter, Kovačević, Andjelka, Mehdipour, Missagh, Miller, Jake A., Netzer, Hagai, Neustadt, Jack M. M., Panagiotou, Christos, Partington, Ethan R., Popović, Luka Č., Sanmartim, David, Vestergaard, Marianne, Ward, Martin J., Zaidouni, Fatima
X-ray reverberation mapping is a powerful technique for probing the innermost accretion disk, whereas continuum reverberation mapping in the UV, optical, and infrared (UVOIR) reveals reprocessing by the rest of the accretion disk and broad-line regio
Externí odkaz:
http://arxiv.org/abs/2409.09115
Autor:
Dehghanian, Maryam, Arav, Nahum, Kriss, Gerard A., Mehdipour, Missagh, Byun, Doyee, Walker, Gwen, Sharma, Mayank, Barth, Aaron J., Bentz, Misty C., Boizelle, Benjamin D., Brotherton, Michael S., Cackett, Edward M., Bonta, Elena Dalla, De Rosa, Gisella, Ferland, Gary J., Fian, Carina, Filippenko, Alexei V., Gelbord, Jonathan, Goad, Michael R., Horne, Keith, Homayouni, Yasaman, Ilic, Dragana, Joner, Michael D., Kara, Erin A., Kaspi, Shai, Kochanek, Christopher S., Korista, Kirk T., Kosec, Peter, Kovacevic, Andjelka B., Landt, Hermine, Lewin, Collin, Partington, Ethan R., Popovic, Luka C., Proga, Daniel, Rogantini, Daniele, Siebert, Matthew R., Storchi-Bergmann, Thaisa, Vestergaard, Marianne, Waters, Timothy, Wang, Jian-Min, Zaidouni, Fatima, Zu, Ying
We observed the Seyfert 1 galaxy Mrk817 during an intensive multi-wavelength reverberation mapping campaign for 16 months. Here, we examine the behavior of narrow UV absorption lines seen in HST/COS spectra, both during the campaign and in other epoc
Externí odkaz:
http://arxiv.org/abs/2407.04164
Autor:
Zaidouni, Fatima, Kara, Erin, Kosec, Peter, Mehdipour, Missagh, Rogantini, Daniele, Kriss, Gerard A., Behar, Ehud, Kaastra, Jelle, Barth, Aaron J., Cackett, Edward M., De Rosa, Gisella, Homayouni, Yasaman, Horne, Keith, Landt, Hermine, Arav, Nahum, Bentz, Misty C., Brotherton, Michael S., Bontà, Elena Dalla, Dehghanian, Maryam, Ferland, Gary J., Fian, Carina, Gelbord, Jonathan, Goad, Michael R., Buitrago, Diego H. González, Grier, Catherine J., Hall, Patrick B., Hu, Chen, Ilić, Dragana, Kaspi, Shai, Kochanek, Christopher S., Kovačević, Andjelka B., Kynoch, Daniel, Lewin, Collin, Montano, John, Netzer, Hagai, Neustadt, Jack M. M., Panagiotou, Christos, Partington, Ethan R., Plesha, Rachel, Popović, Luka Č., Proga, Daniel, Storchi-Bergmann, Thaisa, Sanmartim, David, Siebert, Matthew R., Signorini, Matilde, Vestergaard, Marianne, Waters, Tim, Zu, Ying
We present the results of the XMM-Newton and NuSTAR observations taken as part of the ongoing, intensive multi-wavelength monitoring program of the Seyfert 1 galaxy Mrk 817 by the AGN Space Telescope and Optical Reverberation Mapping 2 (AGN STORM 2)
Externí odkaz:
http://arxiv.org/abs/2406.17061
Autor:
Zuo, Wenwen, Guo, Hengxiao, Sun, Jingbo, Yuan, Qi, Lira, Paulina, Gu, Minfeng, Edwards, Philip G., Gupta, Alok C., Kishore, Shubham, Stevens, Jamie, An, Tao, Cai, Zhen-Yi, Feng, Haicheng, Ho, Luis C., Ilić, Dragana, Kovačević, Andjelka B., Li, ShaSha, Mezcua, Mar, Popović, Luka Č., Sun, Mouyuan, Tripathi, Tushar, U., Vivian, Vince, Oliver, Wang, Jianguo, Wang, Junxian, Wang, Shu, Wu, Xuebing, Zheng, Zhenya
To investigate the short-term variability and determine the size of the optical continuum emitting size of intermediate-mass black holes (IMBHs), we carried out high-cadence, multi-band photometric monitoring of a Seyfert 1 galaxy J0249-0815 across t
Externí odkaz:
http://arxiv.org/abs/2405.11750
Publikováno v:
Open Astronomy, Vol 29, Iss 1, Pp 51-55 (2020)
The active galactic nuclei (AGN) are among the most powerful sources with an inherent, pronounced and random variation of brightness. The randomness of their time series is so subtle as to blur the border between aperiodic fluctuations and noisy osci
Externí odkaz:
https://doaj.org/article/857ab1e43772472da420af4c32d39c66
Autor:
Popović Luka Č.
Publikováno v:
Open Astronomy, Vol 29, Iss 1, Pp 1-14 (2020)
The mass measurement of supermassive black holes (SMBHs) is a very complex task. Between several methods for SMBH mass measurements, some of them use the spectral lines, which indicate the motion of the emitting/absorbing material around an SMBH. Mos
Externí odkaz:
https://doaj.org/article/12fe7ddb333c481fb9d130908a3795bf
Autor:
Janc Natalija, Gavrilov Milivoj B., Marković Slobodan B., Benišek Vojislava Protić, Benišek Vladimir, Popović Luka Č., Tomić Nemanja
Publikováno v:
Open Geosciences, Vol 11, Iss 1, Pp 263-272 (2019)
Ice Ages (IA) and their glacial periods can be regarded as significant natural hazards (NH). Unfortunately, the knowledge of hominid evolution that occurred during IAs, in such extreme climatic fluctuations, is preserved almost exclusively in mytholo
Externí odkaz:
https://doaj.org/article/f8b11a147f684b339e314a6b906a12af
We test the potential of Bayesian synthesis of upcoming multi-instrument data to extract orbital parameters and individual light curves of close binary supermassive black holes (CB-SMBH) with subparsec separations. Next generation (ng) interferometer
Externí odkaz:
http://arxiv.org/abs/2404.17435
Autor:
Neustadt, Jack M. M., Kochanek, Christopher S., Montano, John, Gelbord, Jonathan, Barth, Aaron J., De Rosa, Gisella, Kriss, Gerard A., Cackett, Edward M., Horne, Keith, Kara, Erin A., Landt, Hermine, Netzer, Hagai, Arav, Nahum, Bentz, Misty C., Bonta, Elena Dalla, Dehghanian, Maryam, Du, Pu, Edelson, Rick, Ferland, Gary J., Fian, Carina, Fischer, Travis, Goad, Michael R., Buitrago, Diego H. Gonzalez, Gorjian, Varoujan, Grier, Catherine J., Hall, Patrick B., Homayouni, Y., Hu, Chen, Ilic, Dragana, Joner, Michael D., Kaastra, Jelle, Kaspi, Shai, Korista, Kirk T., Kovacevic, Andjelka B., Lewin, Collin, Li, Yan-Rong, McHardy, Ian M., Mehdipour, Missagh, Miller, Jake A., Panagiotou, Christos, Partington, Ethan, Plesha, Rachel, Pogge, Richard W., Popovic, Luka C., Proga, Daniel, Storchi-Bergmann, Thaisa, Sanmartim, David, Siebert, Matthew R., Signorini, Matilde, Vestergaard, Marianne, Zaidouni, Fatima, Zu, Ying
We fit the UV/optical lightcurves of the Seyfert 1 galaxy Mrk 817 to produce maps of the accretion disk temperature fluctuations $\delta T$ resolved in time and radius. The $\delta T$ maps are dominated by coherent radial structures that move slowly
Externí odkaz:
http://arxiv.org/abs/2310.01497
Publikováno v:
A&A 679, A34 (2023)
We explore the influence of optical Fe II quasi-continuum on the measured spectral parameters in the 4150-5500 A range for the spectra of Type 1 active galactic nuclei (AGNs). We assume that the broad line region is composed of two sub-regions: the v
Externí odkaz:
http://arxiv.org/abs/2309.14852