Follow-up observations of the neptune mass transiting extrasolar planet HAT-P-11b

Jason A. Dittmann, Laird M Close, Elizabeth M. Green, Louis J. Scuderi, Jared R. Males

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

We have confirmed the existence of the transiting super Neptune extrasolar planet HAT-P-11b. On 2009 May 1 UT, the transit of HAT-P-11b was detected at the University of Arizona's 1.55 m Kuiper telescope with 1.7 millimag rms accuracy. We find a central transit time of Tc = 2454952.92534 ± 0.00060 BJD; this transit occurred 80 ± 73 s sooner than previous measurements (71 orbits in the past) would have predicted. Hence, our transit timing rules out the presence of any large (>200 s) deviations from the ephemeris of Bakos etal. We obtain a slightly more accurate period of P = 4.8878045 ± 0.0000043 days. We measure a slightly larger planetary radius of Rp = 0.452 ± 0.020 RJ (5.07 ± 0.22 R ) compared to Bakos and coworkers' value of 0.422 ± 0.014 RJ (4.73 ± 0.16 R ). Our values confirm that HAT-P-11b is very similar to GJ 436b (the only other known transiting super Neptune) in radius and other bulk properties.

Original languageEnglish (US)
JournalAstrophysical Journal
Volume699
Issue number1 PART 2
DOIs
StatePublished - 2009

Fingerprint

Neptune (planet)
Neptune
extrasolar planets
transit
planet
radii
transit time
time measurement
telescopes
orbits
deviation

Keywords

  • Planetary systems
  • Stars: individual (HAT-P-11)

ASJC Scopus subject areas

  • Space and Planetary Science
  • Astronomy and Astrophysics

Cite this

Follow-up observations of the neptune mass transiting extrasolar planet HAT-P-11b. / Dittmann, Jason A.; Close, Laird M; Green, Elizabeth M.; Scuderi, Louis J.; Males, Jared R.

In: Astrophysical Journal, Vol. 699, No. 1 PART 2, 2009.

Research output: Contribution to journalArticle

Dittmann, Jason A. ; Close, Laird M ; Green, Elizabeth M. ; Scuderi, Louis J. ; Males, Jared R. / Follow-up observations of the neptune mass transiting extrasolar planet HAT-P-11b. In: Astrophysical Journal. 2009 ; Vol. 699, No. 1 PART 2.
@article{9caa05a967dd43fba6d8c1e00005d1ef,
title = "Follow-up observations of the neptune mass transiting extrasolar planet HAT-P-11b",
abstract = "We have confirmed the existence of the transiting super Neptune extrasolar planet HAT-P-11b. On 2009 May 1 UT, the transit of HAT-P-11b was detected at the University of Arizona's 1.55 m Kuiper telescope with 1.7 millimag rms accuracy. We find a central transit time of Tc = 2454952.92534 ± 0.00060 BJD; this transit occurred 80 ± 73 s sooner than previous measurements (71 orbits in the past) would have predicted. Hence, our transit timing rules out the presence of any large (>200 s) deviations from the ephemeris of Bakos etal. We obtain a slightly more accurate period of P = 4.8878045 ± 0.0000043 days. We measure a slightly larger planetary radius of Rp = 0.452 ± 0.020 RJ (5.07 ± 0.22 R ⊕) compared to Bakos and coworkers' value of 0.422 ± 0.014 RJ (4.73 ± 0.16 R ⊕). Our values confirm that HAT-P-11b is very similar to GJ 436b (the only other known transiting super Neptune) in radius and other bulk properties.",
keywords = "Planetary systems, Stars: individual (HAT-P-11)",
author = "Dittmann, {Jason A.} and Close, {Laird M} and Green, {Elizabeth M.} and Scuderi, {Louis J.} and Males, {Jared R.}",
year = "2009",
doi = "10.1088/0004-637X/699/1/L48",
language = "English (US)",
volume = "699",
journal = "Astrophysical Journal",
issn = "0004-637X",
publisher = "IOP Publishing Ltd.",
number = "1 PART 2",

}

TY - JOUR

T1 - Follow-up observations of the neptune mass transiting extrasolar planet HAT-P-11b

AU - Dittmann, Jason A.

AU - Close, Laird M

AU - Green, Elizabeth M.

AU - Scuderi, Louis J.

AU - Males, Jared R.

PY - 2009

Y1 - 2009

N2 - We have confirmed the existence of the transiting super Neptune extrasolar planet HAT-P-11b. On 2009 May 1 UT, the transit of HAT-P-11b was detected at the University of Arizona's 1.55 m Kuiper telescope with 1.7 millimag rms accuracy. We find a central transit time of Tc = 2454952.92534 ± 0.00060 BJD; this transit occurred 80 ± 73 s sooner than previous measurements (71 orbits in the past) would have predicted. Hence, our transit timing rules out the presence of any large (>200 s) deviations from the ephemeris of Bakos etal. We obtain a slightly more accurate period of P = 4.8878045 ± 0.0000043 days. We measure a slightly larger planetary radius of Rp = 0.452 ± 0.020 RJ (5.07 ± 0.22 R ⊕) compared to Bakos and coworkers' value of 0.422 ± 0.014 RJ (4.73 ± 0.16 R ⊕). Our values confirm that HAT-P-11b is very similar to GJ 436b (the only other known transiting super Neptune) in radius and other bulk properties.

AB - We have confirmed the existence of the transiting super Neptune extrasolar planet HAT-P-11b. On 2009 May 1 UT, the transit of HAT-P-11b was detected at the University of Arizona's 1.55 m Kuiper telescope with 1.7 millimag rms accuracy. We find a central transit time of Tc = 2454952.92534 ± 0.00060 BJD; this transit occurred 80 ± 73 s sooner than previous measurements (71 orbits in the past) would have predicted. Hence, our transit timing rules out the presence of any large (>200 s) deviations from the ephemeris of Bakos etal. We obtain a slightly more accurate period of P = 4.8878045 ± 0.0000043 days. We measure a slightly larger planetary radius of Rp = 0.452 ± 0.020 RJ (5.07 ± 0.22 R ⊕) compared to Bakos and coworkers' value of 0.422 ± 0.014 RJ (4.73 ± 0.16 R ⊕). Our values confirm that HAT-P-11b is very similar to GJ 436b (the only other known transiting super Neptune) in radius and other bulk properties.

KW - Planetary systems

KW - Stars: individual (HAT-P-11)

UR - http://www.scopus.com/inward/record.url?scp=70549085689&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=70549085689&partnerID=8YFLogxK

U2 - 10.1088/0004-637X/699/1/L48

DO - 10.1088/0004-637X/699/1/L48

M3 - Article

AN - SCOPUS:70549085689

VL - 699

JO - Astrophysical Journal

JF - Astrophysical Journal

SN - 0004-637X

IS - 1 PART 2

ER -