Abstract
Galaxy formation is significantly modulated by energy output from supermassive black holes at the centers of galaxies which grow in highly efficient luminous quasar phases. The timescale on which black holes transition into and out of such phases is, however, unknown. We present the first measurement of the shutdown timescale for an individual quasar using Suzaku and XMM-Newton X-ray observations of the nearby galaxy IC 2497, which hosted a luminous quasar no more than ∼230,000 years ago that is still seen as a light echo in 'Hanny's Voorwerp', but whose presentday radiative output is lower by at least 2 and more likely by over 4 orders of magnitude. This extremely rapid shutdown provides new insights into the physics of accretion in supermassive black holes, and may signal a transition of the accretion disk to a radiatively inefficient state. These results were first presented by [1].
| Original language | English (US) |
|---|---|
| Title of host publication | SUZAKU 2011 - Exploring the X-Ray Universe |
| Subtitle of host publication | Suzaku and Beyond |
| Pages | 193-200 |
| Number of pages | 8 |
| DOIs | |
| State | Published - May 10 2012 |
| Event | Suzaku 2011: Exploring the X-Ray Universe: Suzaku and Beyond - Palo Alto, CA, United States Duration: Jul 20 2011 → Jul 22 2011 |
Publication series
| Name | AIP Conference Proceedings |
|---|---|
| Volume | 1427 |
| ISSN (Print) | 0094-243X |
| ISSN (Electronic) | 1551-7616 |
Other
| Other | Suzaku 2011: Exploring the X-Ray Universe: Suzaku and Beyond |
|---|---|
| Country | United States |
| City | Palo Alto, CA |
| Period | 7/20/11 → 7/22/11 |
Fingerprint
Keywords
- (galaxies:) quasars: general
- (galaxies:) quasars: individual (IC 2497)
Cite this
Probing quasar shutdown timescales with Hanny's Voorwerp. / Evans, Daniel A.; Schawinski, Kevin; Virani, Shanil; Urry, C. Megan; Keel, William C.; Natarajan, Priyamvada; Lintott, Chris J.; Manning, Anna; Coppi, Paolo; Kaviraj, Sugata; Bamford, Steven P.; Józsa, Gyula I.G.; Garrett, Michael; Van Arkel, Hanny; Gay, Pamela; Fortson, Lucy F.
SUZAKU 2011 - Exploring the X-Ray Universe: Suzaku and Beyond. 2012. p. 193-200 (AIP Conference Proceedings; Vol. 1427).Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - Probing quasar shutdown timescales with Hanny's Voorwerp
AU - Evans, Daniel A.
AU - Schawinski, Kevin
AU - Virani, Shanil
AU - Urry, C. Megan
AU - Keel, William C.
AU - Natarajan, Priyamvada
AU - Lintott, Chris J.
AU - Manning, Anna
AU - Coppi, Paolo
AU - Kaviraj, Sugata
AU - Bamford, Steven P.
AU - Józsa, Gyula I.G.
AU - Garrett, Michael
AU - Van Arkel, Hanny
AU - Gay, Pamela
AU - Fortson, Lucy F
PY - 2012/5/10
Y1 - 2012/5/10
N2 - Galaxy formation is significantly modulated by energy output from supermassive black holes at the centers of galaxies which grow in highly efficient luminous quasar phases. The timescale on which black holes transition into and out of such phases is, however, unknown. We present the first measurement of the shutdown timescale for an individual quasar using Suzaku and XMM-Newton X-ray observations of the nearby galaxy IC 2497, which hosted a luminous quasar no more than ∼230,000 years ago that is still seen as a light echo in 'Hanny's Voorwerp', but whose presentday radiative output is lower by at least 2 and more likely by over 4 orders of magnitude. This extremely rapid shutdown provides new insights into the physics of accretion in supermassive black holes, and may signal a transition of the accretion disk to a radiatively inefficient state. These results were first presented by [1].
AB - Galaxy formation is significantly modulated by energy output from supermassive black holes at the centers of galaxies which grow in highly efficient luminous quasar phases. The timescale on which black holes transition into and out of such phases is, however, unknown. We present the first measurement of the shutdown timescale for an individual quasar using Suzaku and XMM-Newton X-ray observations of the nearby galaxy IC 2497, which hosted a luminous quasar no more than ∼230,000 years ago that is still seen as a light echo in 'Hanny's Voorwerp', but whose presentday radiative output is lower by at least 2 and more likely by over 4 orders of magnitude. This extremely rapid shutdown provides new insights into the physics of accretion in supermassive black holes, and may signal a transition of the accretion disk to a radiatively inefficient state. These results were first presented by [1].
KW - (galaxies:) quasars: general
KW - (galaxies:) quasars: individual (IC 2497)
UR - http://www.scopus.com/inward/record.url?scp=84860632013&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84860632013&partnerID=8YFLogxK
U2 - 10.1063/1.3696176
DO - 10.1063/1.3696176
M3 - Conference contribution
AN - SCOPUS:84860632013
SN - 9780735410107
T3 - AIP Conference Proceedings
SP - 193
EP - 200
BT - SUZAKU 2011 - Exploring the X-Ray Universe
ER -