HD 183579b: a warm sub-Neptune transiting a solar twin detected by TESS

Author(s):Show less -

Gan, Tianjun ^[1] ; Bedell, Megan ^[2] ; Wang, Sharon Xuesong ^[1] ; Foreman-Mackey, Daniel ^[2] ; Melendez, Jorge ^[3] ; Mao, Shude ^{[4, 1]} ; Stassun, Keivan G. ^{[5, 6]} ; Howell, Steve B. ^[7] ; Ziegler, Carl ^[8] ; Wittenmyer, Robert A. ^[9] ; Hellier, Coel ^[10] ; Collins, Karen A. ^[11] ; Shporer, Avi ^{[12, 13]} ; Ricker, George R. ^{[12, 13]} ; Vanderspek, Roland ^{[12, 13]} ; Latham, David W. ^[11] ; Seager, Sara ^{[12, 13, 14, 15]} ; Winn, Joshua N. ^[16] ; Jenkins, Jon M. ^[7] ; Addison, Brett C. ^[9] ; Ballard, Sarah ^[17] ; Barclay, Thomas ^{[18, 19]} ; Bean, Jacob L. ^[20] ; Bowler, Brendan P. ^[21] ; Briceno, Cesar ^[22] ; Crossfield, Ian J. M. ^[23] ; Dittman, Jason ^{[24, 11]} ; Horner, Jonathan ^[9] ; Jensen, Eric L. N. ^[25] ; Kane, Stephen R. ^[26] ; Kielkopf, John ^[27] ; Kreidberg, Laura ^{[24, 11]} ; Law, Nicholas ^[28] ; Mann, Andrew W. ^[28] ; Mengel, Matthew W. ^[9] ; Morgan, Edward H. ^{[12, 13]} ; Okumura, Jack ^[9] ; Osborn, Hugh P. ^{[12, 13, 29]} ; Paegert, Martin ^[11] ; Plavchan, Peter ^[30] ; Schwarz, Richard P. ^[31] ; Shiao, Bernie ^[32] ; Smith, Jeffrey C. ^{[7, 33]} ; Spina, Lorenzo ^[34] ; Tinney, C. G. ^[35] ; Torres, Guillermo ^[11] ; Twicken, Joseph D. ^{[7, 33]} ; Vezie, Michael ^{[12, 13]} ; Wang, Gavin ^{[36, 37]} ; Wright, Duncan J. ^[9] ; Zhang, Hui ^[38]

Affiliation:Show less -

^[1] Tsinghua Univ, Dept Astron & Tsinghua, Ctr Astrophys, Beijing 100084 - Peoples R China

^[2] Flatiron Inst, Ctr Computat Astrophys, 162 Fifth Ave, New York, NY 10010 - USA

^[3] Univ Sao Paulo, Dept Astron, IAG, Rua Matao 1226, BR-05509900 Sao Paulo - Brazil

^[4] Chinese Acad Sci, Natl Astron Observ, 20A Datun Rd, Beijing 100012 - Peoples R China

^[5] Vanderbilt Univ, Dept Phys & Astron, 6301 Stevenson Ctr Ln, Nashville, TN 37235 - USA

^[6] Fisk Univ, Dept Phys, 1000 17th Ave North, Nashville, TN 37208 - USA

^[7] NASA, Ames Res Ctr, Moffett Field, CA 94035 - USA

^[8] Stephen F Austin State Univ, Dept Phys Engn & Astron, 1936 North St, Nacogdoches, TX 75962 - USA

^[9] Univ Southern Queensland, Ctr Astrophys, West St, Toowoomba, Qld 4350 - Australia

^[10] Keele Univ, Astrophys Grp, Keele ST5 5BG, Staffs - England

^[11] Ctr Astrophys Harvard & Smithsonian, 60 Garden St, Cambridge, MA 02138 - USA

^[12] MIT, Dept Phys, Cambridge, MA 02139 - USA

^[13] MIT, Kavli Inst Astrophys & Space Res, Cambridge, MA 02139 - USA

^[14] MIT, Dept Earth Atmospher & Planetary Sci, Cambridge, MA 02139 - USA

^[15] MIT, Dept Aeronaut & Astronaut, 77 Massachusetts Ave, Cambridge, MA 02139 - USA

^[16] Princeton Univ, Dept Astrophys Sci, 4 Ivy Lane, Princeton, NJ 08544 - USA

^[17] Univ Florida, Depariment Astron, 211 Bryant Space Sci Ctr, Gainesville, FL 32611 - USA

^[18] NASA, Goddard Space Flight Ctr, 8800 Greenbelt Rd, Greenbelt, MD 20771 - USA

^[19] Univ Maryland, 1000 Hilltop Circle, Baltimore, MD 21250 - USA

^[20] Univ Chicago, Dept Astron & Astrophys, 5640 S Ellis Ave, Chicago, IL 60637 - USA

^[21] Univ Texas Austin, Dept Astron, Austin, TX 78712 - USA

^[22] Cerro Tololo Interamer Observ, Carina 603, La Serena - Chile

^[23] Univ Kansas, Dept Phys & Astron, 1082 Malott, 1251 Wescoe Hall Dr, Lawrence, KS 66045 - USA

^[24] Max Planck Inst Astron, Konigstuhl 17, D-69117 Heidelberg - Germany

^[25] Swarthmore Coll, Dept Phys & Astron, Swarthmore, PA 19081 - USA

^[26] Univ Calif Riverside, Dept Earth & Planetary Sci, Riverside, CA 92521 - USA

^[27] Univ Louisville, Dept Phys & Astron, Louisville, KY 40292 - USA

^[28] Univ N Carolina, Dept Phys & Astron, Chapel Hill, NC 27599 - USA

^[29] Univ Bern, Ctr Space & Habitabil, NCCR PlanetS, CH-3012 Bern - Switzerland

^[30] George Mason Univ, 4400 Univ Dr MS 3F3, Fairfax, VA 22030 - USA

^[31] Patashnick Voorheesville Observ, Voorheesville, NY 12186 - USA

^[32] Space Telescope Sci Inst, 3700 San Martin Dr, Baltimore, MD 21218 - USA

^[33] SETI Inst, 189 Bernardo Ave, Suite 200, Mountain View, CA 94043 - USA

^[34] INAF Osservatorio Astron Padova, Vicolo Osservatorio 5, I-35122 Padua - Italy

^[35] UNSW Sydney, Sch Phys, Exoplanetary Sci UNSW, Sydney, NSW 2052 - Australia

^[36] Tsinghua Int Sch, Beijing 100084 - Peoples R China

^[37] StanfordOnline High Sch, 415 Broadway Acad Hall, Floor 2, 8853, Redwood City, CA 94063 - USA

^[38] Nanjing Univ, Minist Educ, Key Lab Modern Astron & Astrophys, Sch Astron & Space Sci, Nanjing 210046, Jiangsu - Peoples R China

• Document type: Journal article
• Source: Monthly Notices of the Royal Astronomical Society; v. 507, n. 2, p. 2220-2240, OCT 2021.
• Web of Science Citations: 0

Abstract

We report the discovery and characterization of a transiting warm sub-Neptune planet around the nearby bright (V = 8.75 mag, K = 7.15 mag) solar twin HD 183579, delivered by the Transiting Exoplanet Survey Satellite (TESS). The host star is located 56.8 +/- 0.1 pc away with a radius of R-{*} = 0.97 +/- 0.02R(circle dot) and a mass of M-{*} = 1.03 +/- 0.05M(circle dot). We confirm the planetary nature by combining space and ground-based photometry, spectroscopy, and imaging. We find that HD 183579b (TOI-1055b) has a radius of R-p = 3.53 +/- 0.13R(circle plus) on a 17.47 d orbit with a mass of M-p = 11.2 +/- 5.4M(circle plus) (3 sigma mass upper limit of 27.4M(circle plus)). HD 183579b is the fifth brightest known sub-Neptune planet system in the sky, making it an excellent target for future studies of the interior structure and atmospheric properties. By performing a line-by-line differential analysis using the high-resolution and signal-to-noise ratio HARPS spectra, we find that HD 183579 joins the typical solar twin sample, without a statistically significant refractory element depletion. (AU)

• FAPESP's process: 18/04055-8 - High precision spectroscopy: from the first stars to planets
• Grantee: Jorge Luis Melendez Moreno
• Support Opportunities: Research Projects - Thematic Grants