New constraint on the atmosphere of (50000) Quaoar from a stellar occultation

Ko Arimatsu; Ryou Ohsawa; George L. Hashimoto; Seitaro Urakawa; Jun Takahashi; Miyako Tozuka; Yoichi Itoh; Misato Yamashita; Fumihiko Usui; Tsutomu Aoki; Noriaki Arima; Mamoru Doi; Makoto Ichiki; Shiro Ikeda; Yoshifusa Ita; Toshihiro Kasuga; Naoto Kobayashi; Mitsuru Kokubo; Masahiro Konishi; Hiroyuki Maehara; Noriyuki Matsunaga; Takashi Miyata; Mikio Morii; Tomoki Morokuma; Kentaro Motohara; Yoshikazu Nakada; Shin Ichiro Okumura; Shigeyuki Sako; Yuki Sarugaku; Mikiya Sato; Toshikazu Shigeyama; Takao Soyano; Hidenori Takahashi; Kenichi Tarusawa; Nozomu Tominaga; Jun Ichi Watanabe; Takuya Yamashita; Makoto Yoshikawa

New constraint on the atmosphere of (50000) Quaoar from a stellar occultation

Ko Arimatsu, Ryou Ohsawa, George L. Hashimoto, Seitaro Urakawa, Jun Takahashi, Miyako Tozuka, Yoichi Itoh, Misato Yamashita, Fumihiko Usui, Tsutomu Aoki, Noriaki Arima, Mamoru Doi, Makoto Ichiki, Shiro Ikeda, Yoshifusa Ita, Toshihiro Kasuga, Naoto Kobayashi, Mitsuru Kokubo, Masahiro Konishi, Hiroyuki MaeharaNoriyuki Matsunaga, Takashi Miyata, Mikio Morii, Tomoki Morokuma, Kentaro Motohara, Yoshikazu Nakada, Shin Ichiro Okumura, Shigeyuki Sako, Yuki Sarugaku, Mikiya Sato, Toshikazu Shigeyama, Takao Soyano, Hidenori Takahashi, Kenichi Tarusawa, Nozomu Tominaga, Jun Ichi Watanabe, Takuya Yamashita, Makoto Yoshikawa

Research output: Contribution to journal › Article › peer-review

Abstract

We report observations of a stellar occultation by the classical Kuiper belt object (50000) Quaoar occurred on 28 June 2019. A single-chord high-cadence (2 Hz) photometry dataset was obtained with the Tomo-e Gozen CMOS camera mounted on the 1.05 m Schmidt telescope at Kiso Observatory. The obtained ingress and egress data do not show any indication of atmospheric refraction and allow to set new 1 σ and 3σ upper limits of 6 and 16 nbar, respectively, for the surface pressure of a pure methane atmosphere. These upper limits are lower than the saturation vapor pressure of methane at Quaoar's expected mean surface temperature (T ∼ 44 K) and imply the absence of a ∼10 nbar-level global atmosphere formed by methane ice on Quaoar's surface.

Original language	English
Journal	Unknown Journal
Publication status	Published - Oct 22 2019

Keywords

Kuiper Belt Objects: Individual (50000, Quaoar)
Occultations
Planets And Satellites: Atmospheres
Planets And Satellites: Fundamental Parameters

ASJC Scopus subject areas

General

Fingerprint Dive into the research topics of 'New constraint on the atmosphere of (50000) Quaoar from a stellar occultation'. Together they form a unique fingerprint.

Cite this

New constraint on the atmosphere of (50000) Quaoar from a stellar occultation. / Arimatsu, Ko; Ohsawa, Ryou; Hashimoto, George L.; Urakawa, Seitaro; Takahashi, Jun; Tozuka, Miyako; Itoh, Yoichi; Yamashita, Misato; Usui, Fumihiko; Aoki, Tsutomu; Arima, Noriaki; Doi, Mamoru; Ichiki, Makoto; Ikeda, Shiro; Ita, Yoshifusa; Kasuga, Toshihiro; Kobayashi, Naoto; Kokubo, Mitsuru; Konishi, Masahiro; Maehara, Hiroyuki; Matsunaga, Noriyuki; Miyata, Takashi; Morii, Mikio; Morokuma, Tomoki; Motohara, Kentaro; Nakada, Yoshikazu; Okumura, Shin Ichiro; Sako, Shigeyuki; Sarugaku, Yuki; Sato, Mikiya; Shigeyama, Toshikazu; Soyano, Takao; Takahashi, Hidenori; Tarusawa, Kenichi; Tominaga, Nozomu; Watanabe, Jun Ichi; Yamashita, Takuya; Yoshikawa, Makoto.

In: Unknown Journal, 22.10.2019.

Research output: Contribution to journal › Article › peer-review

Arimatsu, K, Ohsawa, R, Hashimoto, GL, Urakawa, S, Takahashi, J, Tozuka, M, Itoh, Y, Yamashita, M, Usui, F, Aoki, T, Arima, N, Doi, M, Ichiki, M, Ikeda, S, Ita, Y, Kasuga, T, Kobayashi, N, Kokubo, M, Konishi, M, Maehara, H, Matsunaga, N, Miyata, T, Morii, M, Morokuma, T, Motohara, K, Nakada, Y, Okumura, SI, Sako, S, Sarugaku, Y, Sato, M, Shigeyama, T, Soyano, T, Takahashi, H, Tarusawa, K, Tominaga, N, Watanabe, JI, Yamashita, T & Yoshikawa, M 2019, 'New constraint on the atmosphere of (50000) Quaoar from a stellar occultation', Unknown Journal.

Arimatsu, Ko ; Ohsawa, Ryou ; Hashimoto, George L. ; Urakawa, Seitaro ; Takahashi, Jun ; Tozuka, Miyako ; Itoh, Yoichi ; Yamashita, Misato ; Usui, Fumihiko ; Aoki, Tsutomu ; Arima, Noriaki ; Doi, Mamoru ; Ichiki, Makoto ; Ikeda, Shiro ; Ita, Yoshifusa ; Kasuga, Toshihiro ; Kobayashi, Naoto ; Kokubo, Mitsuru ; Konishi, Masahiro ; Maehara, Hiroyuki ; Matsunaga, Noriyuki ; Miyata, Takashi ; Morii, Mikio ; Morokuma, Tomoki ; Motohara, Kentaro ; Nakada, Yoshikazu ; Okumura, Shin Ichiro ; Sako, Shigeyuki ; Sarugaku, Yuki ; Sato, Mikiya ; Shigeyama, Toshikazu ; Soyano, Takao ; Takahashi, Hidenori ; Tarusawa, Kenichi ; Tominaga, Nozomu ; Watanabe, Jun Ichi ; Yamashita, Takuya ; Yoshikawa, Makoto. / New constraint on the atmosphere of (50000) Quaoar from a stellar occultation. In: Unknown Journal. 2019.

@article{2d86404f4e6a4473ab8a294330f9c782,

title = "New constraint on the atmosphere of (50000) Quaoar from a stellar occultation",

abstract = "We report observations of a stellar occultation by the classical Kuiper belt object (50000) Quaoar occurred on 28 June 2019. A single-chord high-cadence (2 Hz) photometry dataset was obtained with the Tomo-e Gozen CMOS camera mounted on the 1.05 m Schmidt telescope at Kiso Observatory. The obtained ingress and egress data do not show any indication of atmospheric refraction and allow to set new 1 σ and 3σ upper limits of 6 and 16 nbar, respectively, for the surface pressure of a pure methane atmosphere. These upper limits are lower than the saturation vapor pressure of methane at Quaoar's expected mean surface temperature (T ∼ 44 K) and imply the absence of a ∼10 nbar-level global atmosphere formed by methane ice on Quaoar's surface.",

keywords = "Kuiper Belt Objects: Individual (50000, Quaoar), Occultations, Planets And Satellites: Atmospheres, Planets And Satellites: Fundamental Parameters",

author = "Ko Arimatsu and Ryou Ohsawa and Hashimoto, {George L.} and Seitaro Urakawa and Jun Takahashi and Miyako Tozuka and Yoichi Itoh and Misato Yamashita and Fumihiko Usui and Tsutomu Aoki and Noriaki Arima and Mamoru Doi and Makoto Ichiki and Shiro Ikeda and Yoshifusa Ita and Toshihiro Kasuga and Naoto Kobayashi and Mitsuru Kokubo and Masahiro Konishi and Hiroyuki Maehara and Noriyuki Matsunaga and Takashi Miyata and Mikio Morii and Tomoki Morokuma and Kentaro Motohara and Yoshikazu Nakada and Okumura, {Shin Ichiro} and Shigeyuki Sako and Yuki Sarugaku and Mikiya Sato and Toshikazu Shigeyama and Takao Soyano and Hidenori Takahashi and Kenichi Tarusawa and Nozomu Tominaga and Watanabe, {Jun Ichi} and Takuya Yamashita and Makoto Yoshikawa",

year = "2019",

month = oct,

day = "22",

language = "English",

journal = "[No source information available]",

issn = "0402-1215",

}

TY - JOUR

T1 - New constraint on the atmosphere of (50000) Quaoar from a stellar occultation

AU - Arimatsu, Ko

AU - Ohsawa, Ryou

AU - Hashimoto, George L.

AU - Urakawa, Seitaro

AU - Takahashi, Jun

AU - Tozuka, Miyako

AU - Itoh, Yoichi

AU - Yamashita, Misato

AU - Usui, Fumihiko

AU - Aoki, Tsutomu

AU - Arima, Noriaki

AU - Doi, Mamoru

AU - Ichiki, Makoto

AU - Ikeda, Shiro

AU - Ita, Yoshifusa

AU - Kasuga, Toshihiro

AU - Kobayashi, Naoto

AU - Kokubo, Mitsuru

AU - Konishi, Masahiro

AU - Maehara, Hiroyuki

AU - Matsunaga, Noriyuki

AU - Miyata, Takashi

AU - Morii, Mikio

AU - Morokuma, Tomoki

AU - Motohara, Kentaro

AU - Nakada, Yoshikazu

AU - Okumura, Shin Ichiro

AU - Sako, Shigeyuki

AU - Sarugaku, Yuki

AU - Sato, Mikiya

AU - Shigeyama, Toshikazu

AU - Soyano, Takao

AU - Takahashi, Hidenori

AU - Tarusawa, Kenichi

AU - Tominaga, Nozomu

AU - Watanabe, Jun Ichi

AU - Yamashita, Takuya

AU - Yoshikawa, Makoto

PY - 2019/10/22

Y1 - 2019/10/22

N2 - We report observations of a stellar occultation by the classical Kuiper belt object (50000) Quaoar occurred on 28 June 2019. A single-chord high-cadence (2 Hz) photometry dataset was obtained with the Tomo-e Gozen CMOS camera mounted on the 1.05 m Schmidt telescope at Kiso Observatory. The obtained ingress and egress data do not show any indication of atmospheric refraction and allow to set new 1 σ and 3σ upper limits of 6 and 16 nbar, respectively, for the surface pressure of a pure methane atmosphere. These upper limits are lower than the saturation vapor pressure of methane at Quaoar's expected mean surface temperature (T ∼ 44 K) and imply the absence of a ∼10 nbar-level global atmosphere formed by methane ice on Quaoar's surface.

AB - We report observations of a stellar occultation by the classical Kuiper belt object (50000) Quaoar occurred on 28 June 2019. A single-chord high-cadence (2 Hz) photometry dataset was obtained with the Tomo-e Gozen CMOS camera mounted on the 1.05 m Schmidt telescope at Kiso Observatory. The obtained ingress and egress data do not show any indication of atmospheric refraction and allow to set new 1 σ and 3σ upper limits of 6 and 16 nbar, respectively, for the surface pressure of a pure methane atmosphere. These upper limits are lower than the saturation vapor pressure of methane at Quaoar's expected mean surface temperature (T ∼ 44 K) and imply the absence of a ∼10 nbar-level global atmosphere formed by methane ice on Quaoar's surface.

KW - Kuiper Belt Objects: Individual (50000, Quaoar)

KW - Occultations

KW - Planets And Satellites: Atmospheres

KW - Planets And Satellites: Fundamental Parameters

UR - http://www.scopus.com/inward/record.url?scp=85095168652&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85095168652&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:85095168652

JO - [No source information available]

JF - [No source information available]

SN - 0402-1215

ER -