Zobrazeno 1 - 10
of 36
pro vyhledávání: '"Vivienne F. Baldassare"'
Publikováno v:
The Astrophysical Journal, Vol 971, Iss 1, p 68 (2024)
We assemble a sample of 733 dwarf galaxies ( M _* ≤ 10 ^9.5 M _⊙ ) with signatures of active galactic nuclei (AGN) and explore the intersection between different AGN-selection techniques. Objects in our database are compiled from previous studies
Externí odkaz:
https://doaj.org/article/a21b4711a85f4e0db0901a03555ac95f
Publikováno v:
The Astronomical Journal, Vol 167, Iss 1, p 31 (2023)
We assemble a catalog of 15424 nearby galaxies within 50 Mpc with consistent and homogenized mass, distance, and morphological type measurements. Our catalog combines galaxies from HyperLeda, the NASA-Sloan Atlas, and the Catalog of Local Volume Gala
Externí odkaz:
https://doaj.org/article/9f868281b3da45dead804ee3e17c3c22
Publikováno v:
The Astronomical Journal, Vol 166, Iss 2, p 64 (2023)
We analyze the X-ray properties of a sample of 23 high-probability active galactic nucleus (AGN) candidates with ultraviolet variability identified in Wasleske et al. Using data from the Chandra X-ray Observatory and XMM-Newton Observatory, we that f
Externí odkaz:
https://doaj.org/article/fc1a3a61615748d4b980d211e70992b4
Autor:
Erica Thygesen, Richard M Plotkin, Roberto Soria, Amy E Reines, Jenny E Greene, Gemma E Anderson, Vivienne F Baldassare, Milo G Owens, Ryan T Urquhart, Elena Gallo, James C A Miller-Jones, Jeremiah D Paul, Alexandar P Rollings
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 519:5848-5858
Owing to their quiet evolutionary histories, nearby dwarf galaxies (stellar masses $M_\star \lesssim 3 \times 10^9 M_\odot$) have the potential to teach us about the mechanism(s) that 'seeded' the growth of supermassive black holes, and also how the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::18f18b6fccf3945f7d64dcde6b25c5de
https://doi.org/10.1093/mnras/stad002
https://doi.org/10.1093/mnras/stad002
We analyze Chandra X-ray Observatory imaging of 108 galaxies hosting nuclear star clusters (NSCs) to search for signatures of massive black holes (BHs). NSCs are extremely dense stellar environments with conditions that can theoretically facilitate m
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f75649d357baa4b3ca8a8bac80b28333
http://arxiv.org/abs/2203.02517
http://arxiv.org/abs/2203.02517
Autor:
Kristina Nyland, Vivienne F. Baldassare, Pallavi Patil, Emil Polisensky, Mark Lacy, D. Dong, Namir E. Kassim, Dipanjan Mukherjee, Tracy Clarke, Sjoert van Velzen, Sumit K. Sarbadhicary, Gregg Hallinan, Amy Kimball, Wendy Peters
Publikováno v:
Proceedings of the International Astronomical Union. 15:27-32
As part of an on-going study of radio transients in Epoch 1 (2017-2019) of the Very Large Array Sky Survey (VLASS), we have discovered a sample of 0.2
Comment: IAU Symposium No. 359 Proceedings: Galaxy evolution and feedback across different env
Comment: IAU Symposium No. 359 Proceedings: Galaxy evolution and feedback across different env
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::73cca792a00ca41e30635158217094d4
https://doi.org/10.1017/s1743921320001921
https://doi.org/10.1017/s1743921320001921
About half of nearby galaxies have a central surface brightness >1 magnitude below that of the sky. The overall properties of these low-surface-brightness galaxies (LSBGs) remain understudied, and in particular we know very little about their massive
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::23f1f061c5d1f48f1d18ace80f152509
http://arxiv.org/abs/2006.16342
http://arxiv.org/abs/2006.16342
Autor:
Tracy Clarke, Jenny E. Greene, Andrew Hughes, Namir E. Kassim, Dipanjan Mukherjee, Gregg Hallinan, Wiphu Rujopakarn, Vivienne F. Baldassare, Kunal Mooley, Pallavi Patil, Andy D. Goulding, Wendy Peters, Amy Kimball, Mark Lacy, Leonid Petrov, Sumit K. Sarbadhicary, Emil Polisensky, Sjoert van Velzen, Magdalena Kunert-Bajraszewska, Kristina Nyland, Mark Whittle, Mattia Vaccari, D. Dong, Thomas J. Maccarone
We have performed a search over 3440 deg$^2$ of Epoch 1 (2017-2019) of the Very Large Array Sky Survey to identify unobscured quasars in the optical ($0.2 < z < 3.2$) and obscured active galactic nuclei (AGN) in the infrared that have brightened dram
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cdc60ac37bb8da61d5cf15d98c27c779
Publikováno v:
The Astrophysical Journal. 898:L3
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b697f9ccb1af287477296ec8b40c3cbc
https://doi.org/10.3847/2041-8213/aba0c1
https://doi.org/10.3847/2041-8213/aba0c1
Publikováno v:
The Astrophysical Journal. 896:10
We present an analysis of the long-term optical variability for $\sim50,000$ nearby (z
Submitted to Astrophysical Journal
Submitted to Astrophysical Journal
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cb58f4fd1812429498b8158c4eacefcb
https://doi.org/10.3847/1538-4357/ab8936
https://doi.org/10.3847/1538-4357/ab8936