Another Superdense Sub-Neptune in K2-182 b and Refined Mass Measurements for K2-199 b and c
We combine multiple campaigns of K2 photometry with precision radial velocity measurements from Keck-HIRES to measure the masses of three sub-Neptune-sized planets. We confirm the planetary nature of the massive sub-Neptune K2-182 b ( P b = 4.7 days, R b = 2.69 R ⊕ ) and derive refined parameters fo...
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| Veröffentlicht in: | The Astronomical journal 2021-12, Vol.162 (6), p.294 |
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| creator | Akana Murphy, Joseph M. Kosiarek, Molly R. Batalha, Natalie M. Gonzales, Erica J. Isaacson, Howard Petigura, Erik A Weiss, Lauren M. Grunblatt, Samuel K. Ciardi, David R. Fulton, Benjamin Hirsch, Lea A. Behmard, Aida Rosenthal, Lee J. |
| description | We combine multiple campaigns of K2 photometry with precision radial velocity measurements from Keck-HIRES to measure the masses of three sub-Neptune-sized planets. We confirm the planetary nature of the massive sub-Neptune K2-182 b (
P
b
= 4.7 days,
R
b
= 2.69
R
⊕
) and derive refined parameters for K2-199 b and c (
P
b
= 3.2 days,
R
b
= 1.73
R
⊕
and
P
c
= 7.4 days,
R
c
= 2.85
R
⊕
). These planets provide valuable data points in the mass–radius plane, especially as TESS continues to reveal an increasingly diverse sample of sub-Neptunes. The moderately bright (
V
= 12.0 mag) early K dwarf K2-182 (EPIC 211359660) was observed during K2 campaigns 5 and 18. We find that K2-182 b is potentially one of the densest sub-Neptunes known to date (20 ± 5
M
⊕
and 5.6 ± 1.4 g cm
−3
). The K5V dwarf K2-199 (EPIC 212779596;
V
= 12.3 mag), observed in K2 campaigns 6 and 17, hosts two recently confirmed planets. We refine the orbital and planetary parameters for K2-199 b and c by modeling both campaigns of K2 photometry and adding 12 Keck-HIRES measurements to the existing radial velocity data set (
N
= 33). We find that K2-199 b is likely rocky, at 6.9 ± 1.8
M
⊕
and
7.2
−
2.0
+
2.1
g cm
−3
, and that K2-199 c has an intermediate density at 12.4 ± 2.3
M
⊕
and
2.9
−
0.6
+
0.7
g cm
−3
. We contextualize these planets on the mass–radius plane, discuss a small but intriguing population of “superdense” sub-Neptunes (
R
p
< 3
R
⊕
,
M
p
>20
M
⊕
), and consider our prospects for the planets’ atmospheric characterization. |
| doi_str_mv | 10.3847/1538-3881/ac2830 |
| format | Article |
| fullrecord | <record><control><sourceid>proquest_cross</sourceid><recordid>TN_cdi_proquest_journals_2607338764</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><sourcerecordid>2607338764</sourcerecordid><originalsourceid>FETCH-LOGICAL-c313t-81cb9a3ea85368fa33a7494bd15373d0eb8fb002dd6a2efe8f86973c46b4da6e3</originalsourceid><addsrcrecordid>eNo9kE1LAzEQhoMoWKt3jwHPsclONps9luIXtgp-nDyEZDPBFptdk92D_96tLZ5mGB7mfXkIuRT8GrSsZqIEzUBrMbNNoYEfkcn_6ZhMOOeSqaJUp-Qs5w3nQmguJ-RjHtv-ExN9HTpMHmPGcXXsCbt-iEjXkT4WTOiCOmqjpy8Y1hE9Xdmc6QptHhJuMfaZhjb9oXV9QJtzchLsV8aLw5yS99ubt8U9Wz7fPSzmS9aAgJ5p0bjaAlpdgtLBAthK1tL5sX8FnqPTwXFeeK9sgQF10KquoJHKSW8VwpRc7f92qf0eMPdm0w4pjpGmULwC0JWSI8X3VJPanBMG06X11qYfI7jZKTQ7X2bny-wVwi_Tc2GN</addsrcrecordid><sourcetype>Aggregation Database</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype><pqid>2607338764</pqid></control><display><type>article</type><title>Another Superdense Sub-Neptune in K2-182 b and Refined Mass Measurements for K2-199 b and c</title><source>Institute of Physics IOPscience extra</source><source>Institute of Physics Open Access Journal Titles</source><source>Alma/SFX Local Collection</source><source>EZB Electronic Journals Library</source><creator>Akana Murphy, Joseph M. ; Kosiarek, Molly R. ; Batalha, Natalie M. ; Gonzales, Erica J. ; Isaacson, Howard ; Petigura, Erik A ; Weiss, Lauren M. ; Grunblatt, Samuel K. ; Ciardi, David R. ; Fulton, Benjamin ; Hirsch, Lea A. ; Behmard, Aida ; Rosenthal, Lee J.</creator><creatorcontrib>Akana Murphy, Joseph M. ; Kosiarek, Molly R. ; Batalha, Natalie M. ; Gonzales, Erica J. ; Isaacson, Howard ; Petigura, Erik A ; Weiss, Lauren M. ; Grunblatt, Samuel K. ; Ciardi, David R. ; Fulton, Benjamin ; Hirsch, Lea A. ; Behmard, Aida ; Rosenthal, Lee J.</creatorcontrib><description>We combine multiple campaigns of K2 photometry with precision radial velocity measurements from Keck-HIRES to measure the masses of three sub-Neptune-sized planets. We confirm the planetary nature of the massive sub-Neptune K2-182 b (
P
b
= 4.7 days,
R
b
= 2.69
R
⊕
) and derive refined parameters for K2-199 b and c (
P
b
= 3.2 days,
R
b
= 1.73
R
⊕
and
P
c
= 7.4 days,
R
c
= 2.85
R
⊕
). These planets provide valuable data points in the mass–radius plane, especially as TESS continues to reveal an increasingly diverse sample of sub-Neptunes. The moderately bright (
V
= 12.0 mag) early K dwarf K2-182 (EPIC 211359660) was observed during K2 campaigns 5 and 18. We find that K2-182 b is potentially one of the densest sub-Neptunes known to date (20 ± 5
M
⊕
and 5.6 ± 1.4 g cm
−3
). The K5V dwarf K2-199 (EPIC 212779596;
V
= 12.3 mag), observed in K2 campaigns 6 and 17, hosts two recently confirmed planets. We refine the orbital and planetary parameters for K2-199 b and c by modeling both campaigns of K2 photometry and adding 12 Keck-HIRES measurements to the existing radial velocity data set (
N
= 33). We find that K2-199 b is likely rocky, at 6.9 ± 1.8
M
⊕
and
7.2
−
2.0
+
2.1
g cm
−3
, and that K2-199 c has an intermediate density at 12.4 ± 2.3
M
⊕
and
2.9
−
0.6
+
0.7
g cm
−3
. We contextualize these planets on the mass–radius plane, discuss a small but intriguing population of “superdense” sub-Neptunes (
R
p
< 3
R
⊕
,
M
p
>20
M
⊕
), and consider our prospects for the planets’ atmospheric characterization.</description><identifier>ISSN: 0004-6256</identifier><identifier>EISSN: 1538-3881</identifier><identifier>DOI: 10.3847/1538-3881/ac2830</identifier><language>eng</language><publisher>Madison: IOP Publishing</publisher><subject>Astronomy ; Atmospheric models ; Data points ; Extrasolar planets ; Parameters ; Photometry ; Planets ; Radial velocity</subject><ispartof>The Astronomical journal, 2021-12, Vol.162 (6), p.294</ispartof><rights>Copyright IOP Publishing Dec 2021</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c313t-81cb9a3ea85368fa33a7494bd15373d0eb8fb002dd6a2efe8f86973c46b4da6e3</citedby><cites>FETCH-LOGICAL-c313t-81cb9a3ea85368fa33a7494bd15373d0eb8fb002dd6a2efe8f86973c46b4da6e3</cites><orcidid>0000-0002-6115-4359 ; 0000-0003-0012-9093 ; 0000-0003-0967-2893 ; 0000-0002-7030-9519 ; 0000-0003-3504-5316 ; 0000-0001-8391-5182 ; 0000-0002-5741-3047 ; 0000-0001-8898-8284 ; 0000-0003-4976-9980 ; 0000-0002-3725-3058 ; 0000-0001-8058-7443 ; 0000-0002-0531-1073</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>315,781,785,27926,27927</link.rule.ids></links><search><creatorcontrib>Akana Murphy, Joseph M.</creatorcontrib><creatorcontrib>Kosiarek, Molly R.</creatorcontrib><creatorcontrib>Batalha, Natalie M.</creatorcontrib><creatorcontrib>Gonzales, Erica J.</creatorcontrib><creatorcontrib>Isaacson, Howard</creatorcontrib><creatorcontrib>Petigura, Erik A</creatorcontrib><creatorcontrib>Weiss, Lauren M.</creatorcontrib><creatorcontrib>Grunblatt, Samuel K.</creatorcontrib><creatorcontrib>Ciardi, David R.</creatorcontrib><creatorcontrib>Fulton, Benjamin</creatorcontrib><creatorcontrib>Hirsch, Lea A.</creatorcontrib><creatorcontrib>Behmard, Aida</creatorcontrib><creatorcontrib>Rosenthal, Lee J.</creatorcontrib><title>Another Superdense Sub-Neptune in K2-182 b and Refined Mass Measurements for K2-199 b and c</title><title>The Astronomical journal</title><description>We combine multiple campaigns of K2 photometry with precision radial velocity measurements from Keck-HIRES to measure the masses of three sub-Neptune-sized planets. We confirm the planetary nature of the massive sub-Neptune K2-182 b (
P
b
= 4.7 days,
R
b
= 2.69
R
⊕
) and derive refined parameters for K2-199 b and c (
P
b
= 3.2 days,
R
b
= 1.73
R
⊕
and
P
c
= 7.4 days,
R
c
= 2.85
R
⊕
). These planets provide valuable data points in the mass–radius plane, especially as TESS continues to reveal an increasingly diverse sample of sub-Neptunes. The moderately bright (
V
= 12.0 mag) early K dwarf K2-182 (EPIC 211359660) was observed during K2 campaigns 5 and 18. We find that K2-182 b is potentially one of the densest sub-Neptunes known to date (20 ± 5
M
⊕
and 5.6 ± 1.4 g cm
−3
). The K5V dwarf K2-199 (EPIC 212779596;
V
= 12.3 mag), observed in K2 campaigns 6 and 17, hosts two recently confirmed planets. We refine the orbital and planetary parameters for K2-199 b and c by modeling both campaigns of K2 photometry and adding 12 Keck-HIRES measurements to the existing radial velocity data set (
N
= 33). We find that K2-199 b is likely rocky, at 6.9 ± 1.8
M
⊕
and
7.2
−
2.0
+
2.1
g cm
−3
, and that K2-199 c has an intermediate density at 12.4 ± 2.3
M
⊕
and
2.9
−
0.6
+
0.7
g cm
−3
. We contextualize these planets on the mass–radius plane, discuss a small but intriguing population of “superdense” sub-Neptunes (
R
p
< 3
R
⊕
,
M
p
>20
M
⊕
), and consider our prospects for the planets’ atmospheric characterization.</description><subject>Astronomy</subject><subject>Atmospheric models</subject><subject>Data points</subject><subject>Extrasolar planets</subject><subject>Parameters</subject><subject>Photometry</subject><subject>Planets</subject><subject>Radial velocity</subject><issn>0004-6256</issn><issn>1538-3881</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2021</creationdate><recordtype>article</recordtype><recordid>eNo9kE1LAzEQhoMoWKt3jwHPsclONps9luIXtgp-nDyEZDPBFptdk92D_96tLZ5mGB7mfXkIuRT8GrSsZqIEzUBrMbNNoYEfkcn_6ZhMOOeSqaJUp-Qs5w3nQmguJ-RjHtv-ExN9HTpMHmPGcXXsCbt-iEjXkT4WTOiCOmqjpy8Y1hE9Xdmc6QptHhJuMfaZhjb9oXV9QJtzchLsV8aLw5yS99ubt8U9Wz7fPSzmS9aAgJ5p0bjaAlpdgtLBAthK1tL5sX8FnqPTwXFeeK9sgQF10KquoJHKSW8VwpRc7f92qf0eMPdm0w4pjpGmULwC0JWSI8X3VJPanBMG06X11qYfI7jZKTQ7X2bny-wVwi_Tc2GN</recordid><startdate>20211201</startdate><enddate>20211201</enddate><creator>Akana Murphy, Joseph M.</creator><creator>Kosiarek, Molly R.</creator><creator>Batalha, Natalie M.</creator><creator>Gonzales, Erica J.</creator><creator>Isaacson, Howard</creator><creator>Petigura, Erik A</creator><creator>Weiss, Lauren M.</creator><creator>Grunblatt, Samuel K.</creator><creator>Ciardi, David R.</creator><creator>Fulton, Benjamin</creator><creator>Hirsch, Lea A.</creator><creator>Behmard, Aida</creator><creator>Rosenthal, Lee J.</creator><general>IOP Publishing</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7TG</scope><scope>8FD</scope><scope>H8D</scope><scope>KL.</scope><scope>L7M</scope><orcidid>https://orcid.org/0000-0002-6115-4359</orcidid><orcidid>https://orcid.org/0000-0003-0012-9093</orcidid><orcidid>https://orcid.org/0000-0003-0967-2893</orcidid><orcidid>https://orcid.org/0000-0002-7030-9519</orcidid><orcidid>https://orcid.org/0000-0003-3504-5316</orcidid><orcidid>https://orcid.org/0000-0001-8391-5182</orcidid><orcidid>https://orcid.org/0000-0002-5741-3047</orcidid><orcidid>https://orcid.org/0000-0001-8898-8284</orcidid><orcidid>https://orcid.org/0000-0003-4976-9980</orcidid><orcidid>https://orcid.org/0000-0002-3725-3058</orcidid><orcidid>https://orcid.org/0000-0001-8058-7443</orcidid><orcidid>https://orcid.org/0000-0002-0531-1073</orcidid></search><sort><creationdate>20211201</creationdate><title>Another Superdense Sub-Neptune in K2-182 b and Refined Mass Measurements for K2-199 b and c</title><author>Akana Murphy, Joseph M. ; Kosiarek, Molly R. ; Batalha, Natalie M. ; Gonzales, Erica J. ; Isaacson, Howard ; Petigura, Erik A ; Weiss, Lauren M. ; Grunblatt, Samuel K. ; Ciardi, David R. ; Fulton, Benjamin ; Hirsch, Lea A. ; Behmard, Aida ; Rosenthal, Lee J.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c313t-81cb9a3ea85368fa33a7494bd15373d0eb8fb002dd6a2efe8f86973c46b4da6e3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2021</creationdate><topic>Astronomy</topic><topic>Atmospheric models</topic><topic>Data points</topic><topic>Extrasolar planets</topic><topic>Parameters</topic><topic>Photometry</topic><topic>Planets</topic><topic>Radial velocity</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Akana Murphy, Joseph M.</creatorcontrib><creatorcontrib>Kosiarek, Molly R.</creatorcontrib><creatorcontrib>Batalha, Natalie M.</creatorcontrib><creatorcontrib>Gonzales, Erica J.</creatorcontrib><creatorcontrib>Isaacson, Howard</creatorcontrib><creatorcontrib>Petigura, Erik A</creatorcontrib><creatorcontrib>Weiss, Lauren M.</creatorcontrib><creatorcontrib>Grunblatt, Samuel K.</creatorcontrib><creatorcontrib>Ciardi, David R.</creatorcontrib><creatorcontrib>Fulton, Benjamin</creatorcontrib><creatorcontrib>Hirsch, Lea A.</creatorcontrib><creatorcontrib>Behmard, Aida</creatorcontrib><creatorcontrib>Rosenthal, Lee J.</creatorcontrib><collection>CrossRef</collection><collection>Meteorological & Geoastrophysical Abstracts</collection><collection>Technology Research Database</collection><collection>Aerospace Database</collection><collection>Meteorological & Geoastrophysical Abstracts - Academic</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>The Astronomical journal</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Akana Murphy, Joseph M.</au><au>Kosiarek, Molly R.</au><au>Batalha, Natalie M.</au><au>Gonzales, Erica J.</au><au>Isaacson, Howard</au><au>Petigura, Erik A</au><au>Weiss, Lauren M.</au><au>Grunblatt, Samuel K.</au><au>Ciardi, David R.</au><au>Fulton, Benjamin</au><au>Hirsch, Lea A.</au><au>Behmard, Aida</au><au>Rosenthal, Lee J.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Another Superdense Sub-Neptune in K2-182 b and Refined Mass Measurements for K2-199 b and c</atitle><jtitle>The Astronomical journal</jtitle><date>2021-12-01</date><risdate>2021</risdate><volume>162</volume><issue>6</issue><spage>294</spage><pages>294-</pages><issn>0004-6256</issn><eissn>1538-3881</eissn><abstract>We combine multiple campaigns of K2 photometry with precision radial velocity measurements from Keck-HIRES to measure the masses of three sub-Neptune-sized planets. We confirm the planetary nature of the massive sub-Neptune K2-182 b (
P
b
= 4.7 days,
R
b
= 2.69
R
⊕
) and derive refined parameters for K2-199 b and c (
P
b
= 3.2 days,
R
b
= 1.73
R
⊕
and
P
c
= 7.4 days,
R
c
= 2.85
R
⊕
). These planets provide valuable data points in the mass–radius plane, especially as TESS continues to reveal an increasingly diverse sample of sub-Neptunes. The moderately bright (
V
= 12.0 mag) early K dwarf K2-182 (EPIC 211359660) was observed during K2 campaigns 5 and 18. We find that K2-182 b is potentially one of the densest sub-Neptunes known to date (20 ± 5
M
⊕
and 5.6 ± 1.4 g cm
−3
). The K5V dwarf K2-199 (EPIC 212779596;
V
= 12.3 mag), observed in K2 campaigns 6 and 17, hosts two recently confirmed planets. We refine the orbital and planetary parameters for K2-199 b and c by modeling both campaigns of K2 photometry and adding 12 Keck-HIRES measurements to the existing radial velocity data set (
N
= 33). We find that K2-199 b is likely rocky, at 6.9 ± 1.8
M
⊕
and
7.2
−
2.0
+
2.1
g cm
−3
, and that K2-199 c has an intermediate density at 12.4 ± 2.3
M
⊕
and
2.9
−
0.6
+
0.7
g cm
−3
. We contextualize these planets on the mass–radius plane, discuss a small but intriguing population of “superdense” sub-Neptunes (
R
p
< 3
R
⊕
,
M
p
>20
M
⊕
), and consider our prospects for the planets’ atmospheric characterization.</abstract><cop>Madison</cop><pub>IOP Publishing</pub><doi>10.3847/1538-3881/ac2830</doi><orcidid>https://orcid.org/0000-0002-6115-4359</orcidid><orcidid>https://orcid.org/0000-0003-0012-9093</orcidid><orcidid>https://orcid.org/0000-0003-0967-2893</orcidid><orcidid>https://orcid.org/0000-0002-7030-9519</orcidid><orcidid>https://orcid.org/0000-0003-3504-5316</orcidid><orcidid>https://orcid.org/0000-0001-8391-5182</orcidid><orcidid>https://orcid.org/0000-0002-5741-3047</orcidid><orcidid>https://orcid.org/0000-0001-8898-8284</orcidid><orcidid>https://orcid.org/0000-0003-4976-9980</orcidid><orcidid>https://orcid.org/0000-0002-3725-3058</orcidid><orcidid>https://orcid.org/0000-0001-8058-7443</orcidid><orcidid>https://orcid.org/0000-0002-0531-1073</orcidid><oa>free_for_read</oa></addata></record> |
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| ispartof | The Astronomical journal, 2021-12, Vol.162 (6), p.294 |
| issn | 0004-6256 1538-3881 |
| language | eng |
| recordid | cdi_proquest_journals_2607338764 |
| source | Institute of Physics IOPscience extra; Institute of Physics Open Access Journal Titles; Alma/SFX Local Collection; EZB Electronic Journals Library |
| subjects | Astronomy Atmospheric models Data points Extrasolar planets Parameters Photometry Planets Radial velocity |
| title | Another Superdense Sub-Neptune in K2-182 b and Refined Mass Measurements for K2-199 b and c |
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