A J-band detection of the sub-stellar mass donor in SDSS J1433+1011

S. P. Littlefair; C. D. J. Savoury; V. S. Dhillon; T. R. Marsh; B. T. Gaensicke; T. Butterleym; R. W. Wilson; J. Southworth; C. A. Watson

doi:10.1093/mnras/stt378

A J-band detection of the sub-stellar mass donor in SDSS J1433+1011

S. P. Littlefair^*, C. D. J. Savoury, V. S. Dhillon, T. R. Marsh, B. T. Gaensicke, T. Butterleym, R. W. Wilson, J. Southworth, C. A. Watson

^*Corresponding author for this work

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Abstract

We present time-resolved J-band spectroscopy of the short-period cataclysmic variable SDSS J143317.78+101123.3. We detect absorption lines from the sub-stellar donor star in this system, which contributes 38 +/- 5 per cent to the J-band light. From the relative strengths of the absorption lines in the J band, we estimate the spectral type of the donor star to be L2 +/- 1. These data are the first spectroscopic detection of a donor with a confirmed sub-stellar mass in a cataclysmic variable, and the spectral type is consistent with that expected from semi-empirical evolutionary models.

Using skew mapping, we have been able to derive an estimate for the radial velocity of the donor of K-d = 520 +/- 60 km/s. This value is consistent with, though much less precise than, predictions from mass determinations found via photometric fitting of the eclipse light curves.

Original language	English
Pages (from-to)	2820-2825
Journal	Monthly Notices of the Royal Astronomical Society
Volume	431
Issue number	3
DOIs	https://doi.org/10.1093/mnras/stt378
Publication status	Published - 26 Mar 2013

Keywords

binaries: eclipsing
stars: dwarf novae
stars: individual: SDSS J1433+1011
novae, cataclysmic variables
PERIOD CATACLYSMIC VARIABLES
DWARF LIKE SECONDARIES
WHITE-DWARF
T-DWARFS
INFRARED-SPECTROSCOPY
RADIAL-VELOCITY
STARS
MINIMUM
ROTATION
SPECTRA

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10.1093/mnras/stt378

A J-band detection of the sub-stellar mass donor in SDSS J1433+1011
© 2013 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society. This work is made available online in accordance with the publisher’s policies. Please refer to any applicable terms of use of the publisher.
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title = "A J-band detection of the sub-stellar mass donor in SDSS J1433+1011",

abstract = "We present time-resolved J-band spectroscopy of the short-period cataclysmic variable SDSS J143317.78+101123.3. We detect absorption lines from the sub-stellar donor star in this system, which contributes 38 +/- 5 per cent to the J-band light. From the relative strengths of the absorption lines in the J band, we estimate the spectral type of the donor star to be L2 +/- 1. These data are the first spectroscopic detection of a donor with a confirmed sub-stellar mass in a cataclysmic variable, and the spectral type is consistent with that expected from semi-empirical evolutionary models. Using skew mapping, we have been able to derive an estimate for the radial velocity of the donor of K-d = 520 +/- 60 km/s. This value is consistent with, though much less precise than, predictions from mass determinations found via photometric fitting of the eclipse light curves.",

keywords = "binaries: eclipsing, stars: dwarf novae, stars: individual: SDSS J1433+1011, novae, cataclysmic variables, PERIOD CATACLYSMIC VARIABLES, DWARF LIKE SECONDARIES, WHITE-DWARF, T-DWARFS, INFRARED-SPECTROSCOPY, RADIAL-VELOCITY, STARS, MINIMUM, ROTATION, SPECTRA",

author = "Littlefair, {S. P.} and Savoury, {C. D. J.} and Dhillon, {V. S.} and Marsh, {T. R.} and Gaensicke, {B. T.} and T. Butterleym and Wilson, {R. W.} and J. Southworth and Watson, {C. A.}",

year = "2013",

month = mar,

day = "26",

doi = "10.1093/mnras/stt378",

language = "English",

volume = "431",

pages = "2820--2825",

journal = "Monthly Notices of the Royal Astronomical Society",

issn = "0035-8711",

publisher = "Oxford University Press",

number = "3",

}

A J-band detection of the sub-stellar mass donor in SDSS J1433+1011. / Littlefair, S. P.; Savoury, C. D. J.; Dhillon, V. S.; Marsh, T. R.; Gaensicke, B. T.; Butterleym, T.; Wilson, R. W.; Southworth, J.; Watson, C. A.

In: Monthly Notices of the Royal Astronomical Society, Vol. 431, No. 3, 26.03.2013, p. 2820-2825.

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

TY - JOUR

T1 - A J-band detection of the sub-stellar mass donor in SDSS J1433+1011

AU - Littlefair, S. P.

AU - Savoury, C. D. J.

AU - Dhillon, V. S.

AU - Marsh, T. R.

AU - Gaensicke, B. T.

AU - Butterleym, T.

AU - Wilson, R. W.

AU - Southworth, J.

AU - Watson, C. A.

PY - 2013/3/26

Y1 - 2013/3/26

N2 - We present time-resolved J-band spectroscopy of the short-period cataclysmic variable SDSS J143317.78+101123.3. We detect absorption lines from the sub-stellar donor star in this system, which contributes 38 +/- 5 per cent to the J-band light. From the relative strengths of the absorption lines in the J band, we estimate the spectral type of the donor star to be L2 +/- 1. These data are the first spectroscopic detection of a donor with a confirmed sub-stellar mass in a cataclysmic variable, and the spectral type is consistent with that expected from semi-empirical evolutionary models. Using skew mapping, we have been able to derive an estimate for the radial velocity of the donor of K-d = 520 +/- 60 km/s. This value is consistent with, though much less precise than, predictions from mass determinations found via photometric fitting of the eclipse light curves.

AB - We present time-resolved J-band spectroscopy of the short-period cataclysmic variable SDSS J143317.78+101123.3. We detect absorption lines from the sub-stellar donor star in this system, which contributes 38 +/- 5 per cent to the J-band light. From the relative strengths of the absorption lines in the J band, we estimate the spectral type of the donor star to be L2 +/- 1. These data are the first spectroscopic detection of a donor with a confirmed sub-stellar mass in a cataclysmic variable, and the spectral type is consistent with that expected from semi-empirical evolutionary models. Using skew mapping, we have been able to derive an estimate for the radial velocity of the donor of K-d = 520 +/- 60 km/s. This value is consistent with, though much less precise than, predictions from mass determinations found via photometric fitting of the eclipse light curves.

KW - binaries: eclipsing

KW - stars: dwarf novae

KW - stars: individual: SDSS J1433+1011

KW - novae, cataclysmic variables

KW - PERIOD CATACLYSMIC VARIABLES

KW - DWARF LIKE SECONDARIES

KW - WHITE-DWARF

KW - T-DWARFS

KW - INFRARED-SPECTROSCOPY

KW - RADIAL-VELOCITY

KW - STARS

KW - MINIMUM

KW - ROTATION

KW - SPECTRA

U2 - 10.1093/mnras/stt378

DO - 10.1093/mnras/stt378

M3 - Article

VL - 431

SP - 2820

EP - 2825

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

SN - 0035-8711

IS - 3

ER -

A J-band detection of the sub-stellar mass donor in SDSS J1433+1011

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Keywords

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