| dc.contributor.author | Homan, Jeroen | |
| dc.contributor.author | Kaplan, David L. | |
| dc.contributor.author | van den Berg, Maureen | |
| dc.contributor.author | Young, Andrew J. | |
| dc.date.accessioned | 2015-03-26T14:23:21Z | |
| dc.date.available | 2015-03-26T14:23:21Z | |
| dc.date.issued | 2009-02 | |
| dc.date.submitted | 2008-04 | |
| dc.identifier.issn | 0004-637X | |
| dc.identifier.issn | 1538-4357 | |
| dc.identifier.uri | http://hdl.handle.net/1721.1/96196 | |
| dc.description.abstract | We report the discovery of a near-infrared (NIR) counterpart to the persistent neutron-star low-mass X-ray binary 4U 1705 – 440, at a location consistent with its recently determined Chandra X-ray position. The NIR source is highly variable, with Ks -band magnitudes varying between 15.2 and 17.3 and additional J- and H-band observations revealing color variations. A comparison with contemporaneous X-ray monitoring observations shows that the NIR brightness correlates well with X-ray flux and X-ray spectral state. We also find possible indications of a change in the slope of the NIR/X-ray flux relation among different X-ray states. We discuss and test various proposed mechanisms for the NIR emission from neutron-star low-mass X-ray binaries and conclude that the NIR emission in 4U 1705 – 440 is most likely dominated by X-ray heating of the outer accretion disk and the secondary star. | en_US |
| dc.description.sponsorship | United States. National Aeronautics and Space Administration (Hubble Fellowship grant #01207.01-A, Space Telescope Science Institute) | en_US |
| dc.language.iso | en_US | |
| dc.publisher | Institute of Physics/American Astronomical Society | en_US |
| dc.relation.isversionof | http://dx.doi.org/10.1088/0004-637x/692/1/73 | en_US |
| dc.rights | Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. | en_US |
| dc.source | American Astronomical Society | en_US |
| dc.title | A VARIABLE NEAR-INFRARED COUNTERPART TO THE NEUTRON-STAR LOW-MASS X-RAY BINARY 4U 1705 – 440 | en_US |
| dc.type | Article | en_US |
| dc.identifier.citation | Homan, Jeroen, David L. Kaplan, Maureen van den Berg, and Andrew J. Young. “A VARIABLE NEAR-INFRARED COUNTERPART TO THE NEUTRON-STAR LOW-MASS X-RAY BINARY 4U 1705 – 440.” The Astrophysical Journal 692, no. 1 (February 10, 2009): 73–80. © 2009 American Astronomical Society. | en_US |
| dc.contributor.department | MIT Kavli Institute for Astrophysics and Space Research | en_US |
| dc.contributor.mitauthor | Homan, Jeroen | en_US |
| dc.contributor.mitauthor | Kaplan, David L. | en_US |
| dc.relation.journal | Astrophysical Journal | en_US |
| dc.eprint.version | Final published version | en_US |
| dc.type.uri | http://purl.org/eprint/type/JournalArticle | en_US |
| eprint.status | http://purl.org/eprint/status/PeerReviewed | en_US |
| dspace.orderedauthors | Homan, Jeroen; Kaplan, David L.; van den Berg, Maureen; Young, Andrew J. | en_US |
| mit.license | PUBLISHER_POLICY | en_US |
| mit.metadata.status | Complete | |
