Sökning: id:"swepub:oai:DiVA.org:su-209318" >
Variability-selecte...
Variability-selected Intermediate-mass Black Hole Candidates in Dwarf Galaxies from ZTF and WISE
-
Ward, Charlotte (författare)
-
Gezari, Suvi (författare)
-
Nugent, Peter (författare)
-
visa fler...
-
Bellm, Eric C. (författare)
-
Dekany, Richard (författare)
-
Drake, Andrew (författare)
-
Duev, Dmitry A. (författare)
-
Graham, Matthew J. (författare)
-
Kasliwal, Mansi M. (författare)
-
- Kool, Erik C. (författare)
- Stockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC)
-
Masci, Frank J. (författare)
-
Riddle, Reed L. (författare)
-
visa färre...
-
(creator_code:org_t)
- 2022-09-06
- 2022
- Engelska.
-
Ingår i: Astrophysical Journal. - : American Astronomical Society. - 0004-637X .- 1538-4357. ; 936:2
- Relaterad länk:
-
https://doi.org/10.3...
-
visa fler...
-
https://urn.kb.se/re...
-
https://doi.org/10.3...
-
visa färre...
Abstract
Ämnesord
Stäng
- While it is difficult to observe the first black hole seeds in the early universe, we can study intermediate-mass black holes (IMBHs) in local dwarf galaxies for clues about their origins. In this paper we present a sample of variability-selected active galactic nuclei (AGN) in dwarf galaxies using optical photometry from the Zwicky Transient Facility (ZTF) and forward-modeled mid-IR photometry of time-resolved Wide-field Infrared Survey Explorer (WISE) co-added images. We found that 44 out of 25,714 dwarf galaxies had optically variable AGN candidates and 148 out of 79,879 dwarf galaxies had mid-IR variable AGN candidates, corresponding to active fractions of 0.17% ± 0.03% and 0.19% ± 0.02%, respectively. We found that spectroscopic approaches to AGN identification would have missed 81% of our ZTF IMBH candidates and 69% of our WISE IMBH candidates. Only nine candidates have been detected previously in radio, X-ray, and variability searches for dwarf galaxy AGN. The ZTF and WISE dwarf galaxy AGN with broad Balmer lines have virial masses of 105 M⊙ < MBH < 107 M⊙, but for the rest of the sample, BH masses predicted from host galaxy mass range between 105.2 M⊙ < MBH < 107.25 M⊙. We found that only 5 of 152 previously reported variability-selected AGN candidates from the Palomar Transient Factory in common with our parent sample were variable in ZTF. We also determined a nuclear supernova fraction of 0.05% ± 0.01% yr−1 for dwarf galaxies in ZTF. Our ZTF and WISE IMBH candidates show the promise of variability searches for the discovery of otherwise hidden low-mass AGN.
Ämnesord
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
- NATURVETENSKAP -- Fysik -- Subatomär fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Subatomic Physics (hsv//eng)
Nyckelord
- Active galactic nuclei
- Intermediate-mass black holes
- Dwarf galaxies
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
Hitta via bibliotek
Till lärosätets databas
- Av författaren/redakt...
-
Ward, Charlotte
-
Gezari, Suvi
-
Nugent, Peter
-
Bellm, Eric C.
-
Dekany, Richard
-
Drake, Andrew
-
visa fler...
-
Duev, Dmitry A.
-
Graham, Matthew ...
-
Kasliwal, Mansi ...
-
Kool, Erik C.
-
Masci, Frank J.
-
Riddle, Reed L.
-
visa färre...
- Om ämnet
-
- NATURVETENSKAP
-
NATURVETENSKAP
-
och Fysik
-
och Astronomi astrof ...
-
- NATURVETENSKAP
-
NATURVETENSKAP
-
och Fysik
-
och Subatomär fysik
- Artiklar i publikationen
-
Astrophysical Jo ...
- Av lärosätet
-
Stockholms universitet