A new investigation of hydration in the M-type asteroids

Landsman, Zoe A.; Campins, H.; Pinilla-Alonso, N.; Hanuš, Josef; Lorenzi, V.

doi:10.1016/j.icarus.2015.01.021

Cited by 21 publications

(17 citation statements)

References 61 publications

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“…Evidence for the 3 μm band was detected in spectra of many M-type asteroids, attributed to OH or H 2 O-bearing phases (e.g., Jones et al 1990;Rivkin et al 2000;Landsman et al 2015). Gaffey et al (2002) and references therein proposed a number of plausible alternative interpretations for the presence of the 3 μm band on M-asteroids.…”

Section: Discussionmentioning

confidence: 99%

DETECTION OF WATER AND/OR HYDROXYL ON ASTEROID (16) Psyche

Takir

Reddy

Sanchez

et al. 2016

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In order to search for evidence of hydration on M-type asteroid (16) Psyche, we observed this object in the 3 μm spectral region using the long-wavelength cross-dispersed (LXD: 1.9-4.2 μm) mode of the SpeX spectrograph/ imager at the NASA Infrared Telescope Facility. Our observations show that Psyche exhibits a 3 μm absorption feature, attributed to water or hydroxyl. The 3 μm absorption feature is consistent with the hydration features found on the surfaces of water-rich asteroids, attributed to OH-and/or H 2 O-bearing phases (phyllosilicates). The detection of a 3 μm hydration absorption band on Psyche suggests that this asteroid may not be ametallic core, or it could be a metallic core that has been impacted by carbonaceous material over the past 4.5 Gyr. Our results also indicate rotational spectral variations, which we suggest reflect heterogeneity in the metal/silicate ratio on the surface of Psyche.

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Section: Discussionmentioning

confidence: 99%

DETECTION OF WATER AND/OR HYDROXYL ON ASTEROID (16) Psyche

Takir

Reddy

Sanchez

et al. 2016

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“…Diameter ratios of this system are 0.06 and 0.07. Landsman et al (2015) showed evidence for hydrated minerals in Kleopatra using IRTF observations; approximately 5% on average, as well as rotational variability in the depth of its 3-µm feature. Our AKARI results show a small feature with a ∼ 3% band depth at around 2.78 µm.…”

Section: Kleopatramentioning

confidence: 96%

“…Hesperia is an Xk-type asteroid (or M-type in the Tholen taxonomy). Landsman et al (2015) reported a 3-µm absorption feature with a band depth of 6.2%. Our AKARI results show a feature at around 2.8 µm that is below the detection limit.…”

Section: Hesperiamentioning

confidence: 99%

AKARI/IRC near-infrared asteroid spectroscopic survey: AcuA-spec

Usui

Hasegawa

Ootsubo

et al. 2018

Publications of the Astronomical Society of Japan

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Knowledge of water in the solar system is important for understanding of a wide range of evolutionary processes and the thermal history of the solar system. To explore the existence of water in the solar system, it is indispensable to investigate hydrated minerals and/or water ice on asteroids. These water-related materials show absorption features in the 3-µm band (wavelengths from 2.7 to 3.1 µm). We conducted a spectroscopic survey of asteroids in the 3-µm band using the Infrared Camera (IRC) on board the Japanese infrared satellite AKARI. In the warm mission period of AKARI, 147 pointed observations were performed for 66 asteroids in the grism mode for wavelengths from 2.5 to 5 µm. According to these observations, most C-complex asteroids have clear absorption features (> 10% with respect to the continuum) related to hydrated minerals at a peak wavelength of approximately 2.75 µm, while S-complex asteroids have no significant feature in this wavelength range. The present data are released to the public as the Asteroid Catalog using AKARI Spectroscopic Observations (AcuA-spec).

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“…The study of these asteroids can help with spacecraft and mission design, mission operations, and sample site selection criteria. In addition, the spectroscopic characterization of asteroids is already helping to identify targets with the desired composition for ISRU, such as those rich in hydrated minerals, those that are metal-rich, and even some that are both (e.g., Landsman et al 2015). Walsh et al (2013) for the Polana (light grey dots) and Eulalia families (dark grey dots), respectively.…”

Section: Inner Belt Primitive Asteroids: Families and Backgroundmentioning

confidence: 99%

Compositional Diversity Among Primitive Asteroids

Campins

León

Licandro

et al. 2018

Primitive Meteorites and Asteroids

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Spectroscopic observations from the ultraviolet to the mid-infrared have revealed new and diagnostic differences among primitive asteroids. We review the spectral characteristics of these asteroids and their inferred compositional and physical properties. Primitive asteroids throughout the belt show carbon-rich compounds, varying degrees of aqueous alteration and even surface ice; recent observations provide significant new constraints on composition, thermal inertia, and other surface properties. New mid-infrared connections between primitive asteroids and interplanetary dust particles indicate that the latter sample a larger fraction of main belt asteroids than meteorites. Links with the composition of comets are consistent with a proposed continuum between primitive asteroids and comets. Two sample-return missions, OSIRIS-REx and Hayabusa 2, will visit primitive near-Earth asteroids (NEAs). Most spacecraft-accessible NEAs originate in the inner asteroid belt, which contains several primitive asteroid families and a background of primitive asteroids outside these families. Initial results from these families offer a tantalizing preview of the properties expected in the NEAs they produce. So far, primitive asteroids in the inner belt fall into two spectral groups. The first group includes the Polana-Eulalia families, which show considerable spectral homogeneity in spite of their dynamical and collisional complexity. In contrast, the Erigone and Sulamitis families are spectrally diverse and most of their members show clear 0.7-µm hydration features. The two sample-return targets (101955) Bennu and (162173) Ryugu, most likely originated in the Polana family.

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A new investigation of hydration in the M-type asteroids

Cited by 21 publications

References 61 publications

DETECTION OF WATER AND/OR HYDROXYL ON ASTEROID (16) Psyche

DETECTION OF WATER AND/OR HYDROXYL ON ASTEROID (16) Psyche

AKARI/IRC near-infrared asteroid spectroscopic survey: AcuA-spec

Compositional Diversity Among Primitive Asteroids

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