A Terrestrial Planet in a ~1 AU Orbit Around One Member of a ~15 AU Binary

A Terrestrial Planet in a ~1 AU Orbit Around One Member of a ~15 AU Binary. Gould, A., Udalski, A., Shin, I. G., Porritt, I., Skowron, J., Han, C., Yee, J. C., Kozłowski, S., Choi, J. Y., Poleski, R., Wyrzykowski, Ł., Ulaczyk, K., Pietrukowicz, P., Mróz, P., Szymański, M. K., Kubiak, M., Soszyński, I., Pietrzyński, G., Gaudi, B. S., Christie, G. W., Drummond, J., McCormick, J., Natusch, T., Ngan, H., Tan, T. G., Albrow, M., DePoy, D. L., Hwang, K. H., Jung, Y. K., Lee, C. U., Park, H., Pogge, R. W., Abe, F., Bennett, D. P., Bond, I. A., Botzler, C. S., Freeman, M., Fukui, A., Fukunaga, D., Itow, Y., Koshimoto, N., Larsen, P., Ling, C. H., Masuda, K., Matsubara, Y., Muraki, Y., Namba, S., Ohnishi, K., Philpott, L., Rattenbury, N. J., Saito, T., Sullivan, D. J., Sumi, T., Suzuki, D., Tristram, P. J., Tsurumi, N., Wada, K., Yamai, N., Yock, P. C. M., Yonehara, A., Shvartzvald, Y., Maoz, D., Kaspi, S., & Friedmann, M. 2014. cite arxiv:1407.1115Comment: Published in Science, Main and supplementary material combined

Paper abstract bibtex

We detect a cold, terrestrial planet in a binary-star system using gravitational microlensing. The planet has low mass (2 Earth masses) and lies projected at $a_{\perp,ph}$ ~ 0.8 astronomical units (AU) from its host star, similar to the Earth-Sun distance. However, the planet temperature is much lower, T<60 Kelvin, because the host star is only 0.10--0.15 solar masses and therefore more than 400 times less luminous than the Sun. The host is itself orbiting a slightly more massive companion with projected separation $a_{\perp,ch}=$10--15 AU. Straightforward modification of current microlensing search strategies could increase their sensitivity to planets in binary systems. With more detections, such binary-star/planetary systems could place constraints on models of planet formation and evolution. This detection is consistent with such systems being very common.

@misc{gould2014terrestrial,
  abstract = {We detect a cold, terrestrial planet in a binary-star system using
gravitational microlensing. The planet has low mass (2 Earth masses) and lies
projected at $a_{\perp,ph}$ ~ 0.8 astronomical units (AU) from its host star,
similar to the Earth-Sun distance. However, the planet temperature is much
lower, T<60 Kelvin, because the host star is only 0.10--0.15 solar masses and
therefore more than 400 times less luminous than the Sun. The host is itself
orbiting a slightly more massive companion with projected separation
$a_{\perp,ch}=$10--15 AU. Straightforward modification of current microlensing
search strategies could increase their sensitivity to planets in binary
systems. With more detections, such binary-star/planetary systems could place
constraints on models of planet formation and evolution. This detection is
consistent with such systems being very common.},
  added-at = {2014-07-16T13:02:10.000+0200},
  author = {Gould, A. and Udalski, A. and Shin, I. G. and Porritt, I. and Skowron, J. and Han, C. and Yee, J. C. and Kozłowski, S. and Choi, J. Y. and Poleski, R. and Wyrzykowski, Ł. and Ulaczyk, K. and Pietrukowicz, P. and Mróz, P. and Szymański, M. K. and Kubiak, M. and Soszyński, I. and Pietrzyński, G. and Gaudi, B. S. and Christie, G. W. and Drummond, J. and McCormick, J. and Natusch, T. and Ngan, H. and Tan, T. G. and Albrow, M. and DePoy, D. L. and Hwang, K. H. and Jung, Y. K. and Lee, C. U. and Park, H. and Pogge, R. W. and Abe, F. and Bennett, D. P. and Bond, I. A. and Botzler, C. S. and Freeman, M. and Fukui, A. and Fukunaga, D. and Itow, Y. and Koshimoto, N. and Larsen, P. and Ling, C. H. and Masuda, K. and Matsubara, Y. and Muraki, Y. and Namba, S. and Ohnishi, K. and Philpott, L. and Rattenbury, N. J. and Saito, To. and Sullivan, D. J. and Sumi, T. and Suzuki, D. and Tristram, P. J. and Tsurumi, N. and Wada, K. and Yamai, N. and Yock, P. C. M. and Yonehara, A. and Shvartzvald, Y. and Maoz, D. and Kaspi, S. and Friedmann, M.},
  biburl = {http://www.bibsonomy.org/bibtex/212588c0e1edb56ce78ac28084fcf1bd9/danielcarrera},
  description = {A Terrestrial Planet in a ~1 AU Orbit Around One Member of a ~15 AU
  Binary},
  interhash = {c23912b8ffb9198f71f9ae009215dc7f},
  intrahash = {12588c0e1edb56ce78ac28084fcf1bd9},
  keywords = {Udalski 2014 Gould},
  note = {cite arxiv:1407.1115Comment: Published in Science, Main and supplementary material combined},
  timestamp = {2014-07-16T13:02:10.000+0200},
  title = {A Terrestrial Planet in a ~1 AU Orbit Around One Member of a ~15 AU
  Binary},
  url = {http://arxiv.org/abs/1407.1115},
  year = 2014
}

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