Smithsonian Digital Repository: Recent submissions

  • The young mini-Neptune HD 207496b that is either a naked core or on the verge of becoming one 
    Barros, S. C. C.; Demangeon, O. D. S.; Armstrong, D. J.; Delgado Mena, E.; Acuña, L.; Fernández Fernández, J.; Deleuil, M.; Collins, K. A.; Howell, S. B.; Ziegler, C.; Adibekyan, V.; Sousa, S. G.; Stassun, K. G.; Grieves, N.; Lillo-Box, J.; Hellier, C.; Wheatley, P. J.; Briceño, C.; Collins, K. I.; Hawthorn, F.; Hoyer, S.; Jenkins, J.; Law, N.; Mann, A. W.; Matson, R. A.; Mousis, O.; Nielsen, L. D.; Osborn, A.; Osborn, H.; Paegert, M.; Papini, R.; Ricker, G. R.; Rudat, A. A.; Santos, N. C.; Seager, S.; Stockdale, C.; Strøm, P. A.; Twicken, J. D.; Udry, S.; Wang, G.; Vanderspek, R.; Winn, J. N. (2023)
    Aims: We report the discovery and characterisation of the transiting mini-Neptune HD 207496 b (TOI-1099) as part of a large programme that aims to characterise naked core planets. Methods: We obtained HARPS spectroscopic ...
  • Millimeter Observations of the Type II SN 2023ixf: Constraints on the Proximate Circumstellar Medium 
    Berger, Edo; Keating, Garrett K.; Margutti, Raffaella; Maeda, Keiichi; Alexander, Kate D.; Cendes, Yvette; Eftekhari, Tarraneh; Gurwell, Mark; Hiramatsu, Daichi; Ho, Anna Y. Q.; Laskar, Tanmoy; Rao, Ramprasad; Williams, Peter K. G. (2023)
    We present 1.3 mm (230 GHz) observations of the recent and nearby Type II supernova, SN 2023ixf, obtained with the Submillimeter Array (SMA) at 2.6-18.6 days after explosion. The observations were obtained as part the SMA ...
  • A precursor plateau and pre-maximum [O II] emission in the superluminous SN2019szu: a pulsational pair-instability candidate 
    Aamer, Aysha; Nicholl, Matt; Jerkstrand, Anders; Gomez, Sebastian; Oates, Samantha R.; Smartt, Stephen J.; Srivastav, Shubham; Leloudas, Giorgos; Anderson, Joseph P.; Berger, Edo; de Boer, Thomas; Chambers, Kenneth; Chen, Ting-Wan; Galbany, Lluís; Gao, Hua; Gompertz, Benjamin P.; González-Bañuelos, Maider; Gromadzki, Mariusz; Gutiérrez, Claudia P.; Inserra, Cosimo; Lowe, Thomas B.; Magnier, Eugene A.; Mazzali, Paolo A.; Moore, Thomas; Müller-Bravo, Tomás E.; Pursiainen, Miika; Rest, Armin; Schulze, Steve; Smith, Ken W.; Terwel, Jacco H.; Wainscoat, Richard; Young, David R. (2024)
    We present a detailed study on SN2019szu, a Type I superluminous supernova at z = 0.213 that displayed unique photometric and spectroscopic properties. Pan-STARRS and ZTF forced photometry show a pre-explosion plateau ...
  • False Planets around Giant Stars: A Case Study of Sanders 364 in M67 
    Zhou, Qijia; Latham, David W.; Quinn, Samuel N.; Bieryla, Allyson; Vanderburg, Andrew; Berlind, Perry; Calkins, Michael L.; Esquerdo, Gilbert A. (2023)
    Discovering planets in sparsely populated regions of parameter space is crucial to improving our understanding of planetary formation and evolution. One such region is the subset of planets that orbit giant, evolved stars. ...
  • Cenozoic Dalbergia (Fabaceae) plant fossils from Southwest China: Biogeographic implications and plant-insect interactions 
    Zhao, Yishan; Wappler, Torsten; Labandeira, Conrad; Huang, Jian; Song, Ai; Xie, Sanping; Jia, Linbo; Deng, Weiyudong; Su, Tao (2024)
  • Tidal Disruption Event Demographics with the Zwicky Transient Facility: Volumetric Rates, Luminosity Function, and Implications for the Local Black Hole Mass Function 
    Yao, Yuhan; Ravi, Vikram; Gezari, Suvi; van Velzen, Sjoert; Lu, Wenbin; Schulze, Steve; Somalwar, Jean J.; Kulkarni, S. R.; Hammerstein, Erica; Nicholl, Matt; Graham, Matthew J.; Perley, Daniel A.; Cenko, S. Bradley; Stein, Robert; Ricarte, Angelo; Chadayammuri, Urmila; Quataert, Eliot; Bellm, Eric C.; Bloom, Joshua S.; Dekany, Richard; Drake, Andrew J.; Groom, Steven L.; Mahabal, Ashish A.; Prince, Thomas A.; Riddle, Reed; Rusholme, Ben; Sharma, Yashvi; Sollerman, Jesper; Yan, Lin (2023)
    We conduct a systematic tidal disruption event (TDE) demographics analysis using the largest sample of optically selected TDEs. A flux-limited, spectroscopically complete sample of 33 TDEs is constructed using the Zwicky ...
  • KMT-2022-BLG-0440Lb: A new q <sup>-4</sup> microlensing planet with the central-resonant caustic degeneracy broken 
    Zhang, Jiyuan; Zang, Weicheng; Jung, Youn Kil; Yang, Hongjing; Gould, Andrew; Sumi, Takahiro; Mao, Shude; Dong, Subo; Albrow, Michael D.; Chung, Sun-Ju; Han, Cheongho; Hwang, Kyu-Ha; Ryu, Yoon-Hyun; Shin, In-Gu; Shvartzvald, Yossi; Yee, Jennifer C.; Cha, Sang-Mok; Kim, Dong-Jin; Kim, Hyoun-Woo; Kim, Seung-Lee; Lee, Chung-Uk; Lee, Dong-Joo; Lee, Yongseok; Park, Byeong-Gon; Pogge, Richard W.; Qian, Qiyue; Liu, Zhuokai; Maoz, Dan; Penny, Matthew T.; Zhu, Wei; Abe, Fumio; Barry, Richard; Bennett, David P.; Bhattacharya, Aparna; Bond, Ian A.; Fujii, Hirosane; Fukui, Akihiko; Hamada, Ryusei; Hirao, Yuki; Silva, Stela Ishitani; Itow, Yoshitaka; Kirikawa, Rintaro; Kondo, Iona; Koshimoto, Naoki; Matsubara, Yutaka; Matsumoto, Sho; Miyazaki, Shota; Muraki, Yasushi; Okamura, Arisa; Olmschenk, Greg; Ranc, Clément; Rattenbury, Nicholas J.; Satoh, Yuki; Suzuki, Daisuke; Toda, Taiga; Tomoyoshi, Mio; Tristram, Paul J.; Vandorou, Aikaterini; Yama, Hibiki; Yamashita, Kansuke; MOA Collaboration (2023)
    We present the observations and analysis of a high-magnification microlensing planetary event, KMT-2022-BLG-0440, for which the weak and short-lived planetary signal was covered by both the KMTNet survey and follow-up ...
  • Submillimeter Observations of Magnetic Fields in Massive Star-forming Region W75N 
    Zeng, Lingzhen; Zhang, Qizhou; Alves, Felipe O.; Ching, Tao-Chung; Girart, Josep M.; Liu, Junhao (2023)
    This paper presents the results of full polarization observations of the massive star-forming region W75N, conducted with ~3? spatial resolutions at 345 GHz using the Submillimeter Array. The magnetic field structures in ...
  • Systematic KMTNet Planetary Anomaly Search. VII. Complete Sample of q <sup>-4</sup> Planets from the First 4 yr Survey 
    Zang, Weicheng; Jung, Youn Kil; Yang, Hongjing; Zhang, Xiangyu; Udalski, Andrzej; Yee, Jennifer C.; Gould, Andrew; Mao, Shude; Albrow, Michael D.; Chung, Sun-Ju; Han, Cheongho; Hwang, Kyu-Ha; Ryu, Yoon-Hyun; Shin, In-Gu; Shvartzvald, Yossi; Cha, Sang-Mok; Kim, Dong-Jin; Kim, Hyoun-Woo; Kim, Seung-Lee; Lee, Chung-Uk; Lee, Dong-Joo; Lee, Yongseok; Park, Byeong-Gon; Pogge, Richard W.; KMTNet Collaboration; Mróz, Przemek; Skowron, Jan; Poleski, Radoslaw; Szymanski, Michal K.; Soszynski, Igor; Pietrukowicz, Pawel; Kozlowski, Szymon; Ulaczyk, Krzysztof; Rybicki, Krzysztof A.; Iwanek, Patryk; Wrona, Marcin; Gromadzki, Mariusz; OGLE Collaboration; Wang, Hanyue; Zhang, Jiyuan; Zhu, Wei; MAP Collaboration (2023)
    We present the analysis of seven microlensing planetary events with planet/host mass ratios q <sup>-4</sup>: KMT-2017-BLG-1194, KMT-2017-BLG-0428, KMT-2019-BLG-1806, KMT-2017-BLG-1003, KMT-2019-BLG-1367, OGLE-2017-BLG-1806, ...
  • Probing the Origin of Changing-look Quasar Transitions with Chandra 
    Yang, Qian; Green, Paul J.; MacLeod, Chelsea L.; Plotkin, Richard M.; Anderson, Scott F.; Bieryla, Allyson; Civano, Francesca; Eracleous, Michael; Graham, Matthew; Ruan, John J.; Runnoe, Jessie; Zhao, Xiurui (2023)
    Extremely variable quasars can also show strong changes in broad-line emission strength and are known as changing-look quasars (CLQs). To study the CLQ transition mechanism, we present a pilot sample of CLQs with X-ray ...
  • TRAO Survey of Nearby Filamentary Molecular Clouds, the Universal Nursery of Stars (TRAO-FUNS). III. Filaments and Dense Cores in the NGC 2068 and NGC 2071 Regions of Orion B 
    Yoo, Hyunju; Lee, Chang Won; Chung, Eun Jung; Kim, Shinyoung; Tafalla, Mario; Caselli, Paola; Myers, Philip C.; Kim, Kyoung Hee; Liu, Tie; Kwon, Woojin; Soam, Archana; Kim, Jongsoo (2023)
    We present the results of molecular line observations performed toward the NGC 2068 and NGC 2071 regions of the Orion B cloud as the TRAO-FUNS project to study the roles of the filamentary structure in the formation of ...
  • Systematic reanalysis of KMTNet microlensing events, paper I: Updates of the photometry pipeline and a new planet candidate 
    Yang, Hongjing; Yee, Jennifer C.; Hwang, Kyu-Ha; Qian, Qiyue; Bond, Ian A.; Gould, Andrew; Hu, Zhecheng; Zhang, Jiyuan; Mao, Shude; Zhu, Wei; Albrow, Michael D.; Chung, Sun-Ju; Kim, Seung-Lee; Park, Byeong-Gon; Han, Cheongho; Jung, Youn Kil; Ryu, Yoon-Hyun; Shin, In-Gu; Shvartzvald, Yossi; Cha, Sang-Mok; Kim, Dong-Jin; Kim, Hyoun-Woo; Lee, Chung-Uk; Lee, Dong-Joo; Lee, Yongseok; Pogge, Richard W.; Zang, Weicheng; Abe, Fumio; Barry, Richard; Bennett, David P.; Bhattacharya, Aparna; Donachie, Martin; Fujii, Hirosane; Fukui, Akihiko; Hirao, Yuki; Itow, Yoshitaka; Kirikawa, Rintaro; Kondo, Iona; Koshimoto, Naoki; Silva, Stela Ishitani; Li, Man Cheung Alex; Matsubara, Yutaka; Muraki, Yasushi; Suzuki, Daisuke; Tristram, Paul J.; Yonehara, Atsunori; Ranc, Clément; Miyazaki, Shota; Olmschenk, Greg; Rattenbury, Nicholas J.; Satoh, Yuki; Shoji, Hikaru; Sumi, Takahiro; Tanaka, Yuzuru; Yamawaki, Tsubasa (2024)
    In this work, we update and develop algorithms for KMTNet tender-love care (TLC) photometry in order to create a new, mostly automated, TLC pipeline. We then start a project to systematically apply the new TLC pipeline to ...
  • HYPerluminous quasars at the Epoch of ReionizatION (HYPERION): A new regime for the X-ray nuclear properties of the first quasars 
    Zappacosta, L.; Piconcelli, E.; Fiore, F.; Saccheo, I.; Valiante, R.; Vignali, C.; Vito, F.; Volonteri, M.; Bischetti, M.; Comastri, A.; Done, C.; Elvis, M.; Giallongo, E.; La Franca, F.; Lanzuisi, G.; Laurenti, M.; Miniutti, G.; Bongiorno, A.; Brusa, M.; Civano, F.; Carniani, S.; D'Odorico, V.; Feruglio, C.; Gallerani, S.; Gilli, R.; Grazian, A.; Guainazzi, M.; Marinucci, A.; Menci, N.; Middei, R.; Nicastro, F.; Puccetti, S.; Tombesi, F.; Tortosa, A.; Testa, V.; Vietri, G.; Cristiani, S.; Haardt, F.; Maiolino, R.; Schneider, R.; Tripodi, R.; Vallini, L.; Vanzella, E. (2023)
    The existence of luminous quasars (QSOs) at the epoch of reionization (EoR; i.e., z > 6) powered by well-grown supermassive black holes (SMBHs) with masses ?10<sup>9</sup> M<sub>?</sub> challenges models of early SMBH ...
  • ATOMS: ALMA three-millimeter observations of massive star-forming regions - XIII. Ongoing triggered star formation within clump-fed scenario found in the massive ( 1500 M<sub>?</sub>) clump 
    Zhang, Siju; Wang, Ke; Liu, Tie; Zavagno, Annie; Juvela, Mika; Liu, Hongli; Tej, Anandmayee; Stutz, Amelia M.; Li, Shanghuo; Bronfman, Leonardo; Zhang, Qizhou; Goldsmith, Paul F.; Lee, Chang Won; Vázquez-Semadeni, Enrique; Tatematsu, Ken'ichi; Jiao, Wenyu; Xu, Fengwei; Wang, Chao; Zhou, Jian-Wen (2023)
    Whether ionization feedback triggers the formation of massive stars is highly debated. Using ALMA 3-mm observations with a spatial resolution of ~0.05 pc and a mass sensitivity of 1.1 $\rm M_\odot$ per beam at 20 K, we ...
  • Wide post-common envelope binaries containing ultramassive white dwarfs: evidence for efficient envelope ejection in massive asymptotic giant branch stars 
    Yamaguchi, Natsuko; El-Badry, Kareem; Fuller, Jim; Latham, David W.; Cargile, Phillip A.; Mazeh, Tsevi; Shahaf, Sahar; Bieryla, Allyson; Buchhave, Lars A.; Hobson, Melissa (2024)
    Post-common envelope binaries (PCEBs) containing a white dwarf (WD) and a main-sequence (MS) star can constrain the physics of common envelope evolution and calibrate binary evolution models. Most PCEBs studied to date ...
  • The Chandra Cygnus OB2 Legacy Survey: Design and X-Ray Point-source Catalog 
    Wright, Nicholas J.; Drake, Jeremy J.; Guarcello, Mario G.; Aldcroft, Tom L.; Kashyap, Vinay L.; Damiani, Francesco; DePasquale, Joseph; Fruscione, Antonella (2023)
    The Cygnus OB2 association is the largest concentration of young and massive stars within 2 kpc of the Sun, including an estimated ~65 O-type stars and hundreds of OB stars. The Chandra Cygnus OB2 Legacy Survey is a large ...
  • JWST's PEARLS: Transients in the MACS J0416.1-2403 Field 
    Yan, Haojing; Ma, Zhiyuan; Sun, Bangzheng; Wang, Lifan; Kelly, Patrick; Diego, José M.; Cohen, Seth H.; Windhorst, Rogier A.; Jansen, Rolf A.; Grogin, Norman A.; Beacom, John F.; Conselice, Christopher J.; Driver, Simon P.; Frye, Brenda; Coe, Dan; Marshall, Madeline A.; Koekemoer, Anton; Willmer, Christopher N. A.; Robotham, Aaron; D'Silva, Jordan C. J.; Summers, Jake; Nonino, Mario; Pirzkal, Nor; Ryan, Russell E.; Ortiz, Rafael; Tompkins, Scott; Bhatawdekar, Rachana A.; Cheng, Cheng; Zitrin, Adi; Willner, S. P. (2023)
    With its unprecedented sensitivity and spatial resolution, the James Webb Space Telescope (JWST) has opened a new window for time-domain discoveries in the infrared. Here we report observations in the only field that has ...
  • Simulating the Sensitivity to Stellar Point Sources of Chandra X-Ray Observations 
    Wright, Nicholas J.; Drake, Jeremy J.; Guarcello, Mario G.; Kashyap, Vinay L.; Zezas, Andreas (2023)
    The Chandra Cygnus OB2 Legacy Survey is a wide and deep X-ray survey of the nearby and massive Cygnus OB2 association. The survey has detected ~8000 X-ray sources, the majority of which are pre-main-sequence X-ray-emitting ...
  • PEARLS: Near-infrared Photometry in the JWST North Ecliptic Pole Time Domain Field 
    Willmer, Christopher N. A.; Ly, Chun; Kikuta, Satoshi; Kattner, S. A.; Jansen, Rolf A.; Cohen, Seth H.; Windhorst, Rogier A.; Smail, Ian; Tompkins, Scott; Beacom, John F.; Cheng, Cheng; Conselice, Christopher J.; Frye, Brenda L.; Koekemoer, Anton M.; Hathi, Nimish; Hyun, Minhee; Im, Myungshin; Willner, S. P.; Zhao, Xiurui; Brisken, Walter A.; Civano, Francesca; Cotton, William; Hasinger, Günther; Maksym, W. Peter; Rieke, Marcia J.; Grogin, Norman A. (2023)
    We present near-infrared (NIR) ground-based Y, J, H, and K imaging obtained in the James Webb Space Telescope (JWST) North Ecliptic Pole Time Domain Field (NEP TDF) using the MMT-Magellan Infrared Imager and Spectrometer ...
  • The role of turbulence in high-mass star formation: Subsonic and transonic turbulence are ubiquitously found at early stages 
    Wang, Chao; Wang, Ke; Xu, Feng-Wei; Sanhueza, Patricio; Liu, Hauyu Baobab; Zhang, Qizhou; Lu, Xing; Fontani, F.; Caselli, Paola; Busquet, Gemma; Tan, Jonathan C.; Li, Di; Jackson, J. M.; Pillai, Thushara; Ho, Paul T. P.; Guzmán, Andrés E.; Yue, Nannan (2024)
    Context. Traditionally, supersonic turbulence is considered to be one of the most likely mechanisms slowing the gravitational collapse in dense clumps, thereby enabling the formation of massive stars. However, several ...

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