Extracting the Physical Parameters of a Sample of M-dwarfs from High-resolution Near-infrared Spectra

Carlos del Burgo; Eduardo L. Martin; Maria Rosa Zapatero Osorio; Rohit Deshpande; Soeren Witte; Christiane Helling; Peter H. Hauschildt

Extracting the Physical Parameters of a Sample of M-dwarfs from High-resolution Near-infrared Spectra

Carlos del Burgo^*, Eduardo L. Martin, Maria Rosa Zapatero Osorio, Rohit Deshpande, Soeren Witte, Christiane Helling, Peter H. Hauschildt

^*Corresponding author for this work

School of Physics and Astronomy

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

This study is part of an effort to determine the physical and kinematical properties of a sample of 36 nearby late M-dwarfs, with spectral types M5-M9.5. They are the targets of a program to search for exoplanets orbiting around them from the radial velocity method using the near-infrared echelle spectrograph NIRSPEC on the Keck 11 telescope. Preliminary results about the effective temperature, surface gravity, and rotational broadening of a subsample of nine M-dwarfs are presented. The analysis is based on the comparison of the spectra obtained in the J-band with a high resolving power of 22,000 and stellar atmosphere synthetic models using the PHOENDC and the PHOENIX/DRIFT codes. This study shows that the strong potassium absorption doublet at 12432 and 12522 angstrom is useful to determine the effective temperature. Our results are of interest for the new generation of near-infrared spectrographs that are being developed to measure radial velocities with unprecedented precisions of a few ms(-1), for which accurate theoretical models for comparison are needed.

Original language	English
Title of host publication	NEW QUESTS IN STELLAR ASTROPHYSICS III: A PANCHROMATIC VIEW OF SOLAR-LIKE STARS, WITH AND WITHOUT PLANETS
Editors	M Chavez, E Bertone, O Vega, DeLaLuz
Publisher	Astronomical Society of the Pacific
Pages	53-+
Number of pages	2
ISBN (Print)	978-1-58381-828-2
Publication status	Published - 2013
Event	3rd International Conference on New Quests in Stellar Astrophysics: A Panchromatic View of Solar-like Stars With and Without Planets - Puerto Vallarta, Mexico Duration: 12 Mar 2012 → 16 Mar 2012

Publication series

Name	Astronomical Society of the Pacific Conference Series
Publisher	ASTRONOMICAL SOC PACIFIC
Volume	472

Conference

Conference	3rd International Conference on New Quests in Stellar Astrophysics: A Panchromatic View of Solar-like Stars With and Without Planets
Country/Territory	Mexico
City	Puerto Vallarta
Period	12/03/12 → 16/03/12

Keywords

BROWN DWARFS
MODEL ATMOSPHERES
STARS
DUST

Cite this

del Burgo, C., Martin, E. L., Zapatero Osorio, M. R., Deshpande, R., Witte, S., Helling, C., & Hauschildt, P. H. (2013). Extracting the Physical Parameters of a Sample of M-dwarfs from High-resolution Near-infrared Spectra. In M. Chavez, E. Bertone, O. Vega, & DeLaLuz (Eds.), NEW QUESTS IN STELLAR ASTROPHYSICS III: A PANCHROMATIC VIEW OF SOLAR-LIKE STARS, WITH AND WITHOUT PLANETS (pp. 53-+). (Astronomical Society of the Pacific Conference Series; Vol. 472). Astronomical Society of the Pacific.

del Burgo, Carlos ; Martin, Eduardo L. ; Zapatero Osorio, Maria Rosa et al. / Extracting the Physical Parameters of a Sample of M-dwarfs from High-resolution Near-infrared Spectra. NEW QUESTS IN STELLAR ASTROPHYSICS III: A PANCHROMATIC VIEW OF SOLAR-LIKE STARS, WITH AND WITHOUT PLANETS. editor / M Chavez ; E Bertone ; O Vega ; DeLaLuz. Astronomical Society of the Pacific, 2013. pp. 53-+ (Astronomical Society of the Pacific Conference Series).

@inproceedings{c965bc86006e45c08c95c2bd2a09bafc,

title = "Extracting the Physical Parameters of a Sample of M-dwarfs from High-resolution Near-infrared Spectra",

abstract = "This study is part of an effort to determine the physical and kinematical properties of a sample of 36 nearby late M-dwarfs, with spectral types M5-M9.5. They are the targets of a program to search for exoplanets orbiting around them from the radial velocity method using the near-infrared echelle spectrograph NIRSPEC on the Keck 11 telescope. Preliminary results about the effective temperature, surface gravity, and rotational broadening of a subsample of nine M-dwarfs are presented. The analysis is based on the comparison of the spectra obtained in the J-band with a high resolving power of 22,000 and stellar atmosphere synthetic models using the PHOENDC and the PHOENIX/DRIFT codes. This study shows that the strong potassium absorption doublet at 12432 and 12522 angstrom is useful to determine the effective temperature. Our results are of interest for the new generation of near-infrared spectrographs that are being developed to measure radial velocities with unprecedented precisions of a few ms(-1), for which accurate theoretical models for comparison are needed.",

keywords = "BROWN DWARFS, MODEL ATMOSPHERES, STARS, DUST",

author = "{del Burgo}, Carlos and Martin, {Eduardo L.} and {Zapatero Osorio}, {Maria Rosa} and Rohit Deshpande and Soeren Witte and Christiane Helling and Hauschildt, {Peter H.}",

year = "2013",

language = "English",

isbn = "978-1-58381-828-2",

series = "Astronomical Society of the Pacific Conference Series",

publisher = "Astronomical Society of the Pacific",

pages = "53--+",

editor = "M Chavez and E Bertone and O Vega and DeLaLuz",

booktitle = "NEW QUESTS IN STELLAR ASTROPHYSICS III: A PANCHROMATIC VIEW OF SOLAR-LIKE STARS, WITH AND WITHOUT PLANETS",

note = "3rd International Conference on New Quests in Stellar Astrophysics: A Panchromatic View of Solar-like Stars With and Without Planets ; Conference date: 12-03-2012 Through 16-03-2012",

}

del Burgo, C, Martin, EL, Zapatero Osorio, MR, Deshpande, R, Witte, S, Helling, C & Hauschildt, PH 2013, Extracting the Physical Parameters of a Sample of M-dwarfs from High-resolution Near-infrared Spectra. in M Chavez, E Bertone, O Vega & DeLaLuz (eds), NEW QUESTS IN STELLAR ASTROPHYSICS III: A PANCHROMATIC VIEW OF SOLAR-LIKE STARS, WITH AND WITHOUT PLANETS. Astronomical Society of the Pacific Conference Series, vol. 472, Astronomical Society of the Pacific, pp. 53-+, 3rd International Conference on New Quests in Stellar Astrophysics: A Panchromatic View of Solar-like Stars With and Without Planets, Puerto Vallarta, Mexico, 12/03/12.

Extracting the Physical Parameters of a Sample of M-dwarfs from High-resolution Near-infrared Spectra. / del Burgo, Carlos; Martin, Eduardo L.; Zapatero Osorio, Maria Rosa et al.
NEW QUESTS IN STELLAR ASTROPHYSICS III: A PANCHROMATIC VIEW OF SOLAR-LIKE STARS, WITH AND WITHOUT PLANETS. ed. / M Chavez; E Bertone; O Vega; DeLaLuz. Astronomical Society of the Pacific, 2013. p. 53-+ (Astronomical Society of the Pacific Conference Series; Vol. 472).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

TY - GEN

T1 - Extracting the Physical Parameters of a Sample of M-dwarfs from High-resolution Near-infrared Spectra

AU - del Burgo, Carlos

AU - Martin, Eduardo L.

AU - Zapatero Osorio, Maria Rosa

AU - Deshpande, Rohit

AU - Witte, Soeren

AU - Helling, Christiane

AU - Hauschildt, Peter H.

PY - 2013

Y1 - 2013

N2 - This study is part of an effort to determine the physical and kinematical properties of a sample of 36 nearby late M-dwarfs, with spectral types M5-M9.5. They are the targets of a program to search for exoplanets orbiting around them from the radial velocity method using the near-infrared echelle spectrograph NIRSPEC on the Keck 11 telescope. Preliminary results about the effective temperature, surface gravity, and rotational broadening of a subsample of nine M-dwarfs are presented. The analysis is based on the comparison of the spectra obtained in the J-band with a high resolving power of 22,000 and stellar atmosphere synthetic models using the PHOENDC and the PHOENIX/DRIFT codes. This study shows that the strong potassium absorption doublet at 12432 and 12522 angstrom is useful to determine the effective temperature. Our results are of interest for the new generation of near-infrared spectrographs that are being developed to measure radial velocities with unprecedented precisions of a few ms(-1), for which accurate theoretical models for comparison are needed.

AB - This study is part of an effort to determine the physical and kinematical properties of a sample of 36 nearby late M-dwarfs, with spectral types M5-M9.5. They are the targets of a program to search for exoplanets orbiting around them from the radial velocity method using the near-infrared echelle spectrograph NIRSPEC on the Keck 11 telescope. Preliminary results about the effective temperature, surface gravity, and rotational broadening of a subsample of nine M-dwarfs are presented. The analysis is based on the comparison of the spectra obtained in the J-band with a high resolving power of 22,000 and stellar atmosphere synthetic models using the PHOENDC and the PHOENIX/DRIFT codes. This study shows that the strong potassium absorption doublet at 12432 and 12522 angstrom is useful to determine the effective temperature. Our results are of interest for the new generation of near-infrared spectrographs that are being developed to measure radial velocities with unprecedented precisions of a few ms(-1), for which accurate theoretical models for comparison are needed.

KW - BROWN DWARFS

KW - MODEL ATMOSPHERES

KW - STARS

KW - DUST

M3 - Conference contribution

SN - 978-1-58381-828-2

T3 - Astronomical Society of the Pacific Conference Series

SP - 53-+

BT - NEW QUESTS IN STELLAR ASTROPHYSICS III: A PANCHROMATIC VIEW OF SOLAR-LIKE STARS, WITH AND WITHOUT PLANETS

A2 - Chavez, M

A2 - Bertone, E

A2 - Vega, O

A2 - DeLaLuz, null

PB - Astronomical Society of the Pacific

T2 - 3rd International Conference on New Quests in Stellar Astrophysics: A Panchromatic View of Solar-like Stars With and Without Planets

Y2 - 12 March 2012 through 16 March 2012

ER -

del Burgo C, Martin EL, Zapatero Osorio MR, Deshpande R, Witte S, Helling C et al. Extracting the Physical Parameters of a Sample of M-dwarfs from High-resolution Near-infrared Spectra. In Chavez M, Bertone E, Vega O, DeLaLuz, editors, NEW QUESTS IN STELLAR ASTROPHYSICS III: A PANCHROMATIC VIEW OF SOLAR-LIKE STARS, WITH AND WITHOUT PLANETS. Astronomical Society of the Pacific. 2013. p. 53-+. (Astronomical Society of the Pacific Conference Series).

Extracting the Physical Parameters of a Sample of M-dwarfs from High-resolution Near-infrared Spectra

Abstract

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Keywords

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